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Showing posts with label (TEL T27). Show all posts
Showing posts with label (TEL T27). Show all posts

Jun 9, 2018

Confirmation Images of the COMET C/2018 L2 (ATLAS) on 2018-06-07

...

A confirmation image of the COMET C/2018 L2 (ATLAS)
on 2018-06-07 from Siding Spring Observatory,
Coonabarabran, NSW, Australia. (MPC Q62)
a stack of 5 - 60 second luminance BIN2 images taken
with iTelescope.net's (T27 TEL 0.70-m f/6.6 reflector + CCD)
By Steven M. Tilley


A confirmation image of the COMET C/2018 L2 (ATLAS)
on 2018-06-07 from Siding Spring Observatory,
Coonabarabran, NSW, Australia. (MPC Q62)
a stack of 5 - 60 second luminance BIN2 images taken
with iTelescope.net's (T27 TEL 0.70-m f/6.6 reflector + CCD)
By Steven M. Tilley


A confirmation image of the COMET C/2018 L2 (ATLAS)
on 2018-06-07 from Siding Spring Observatory,
Coonabarabran, NSW, Australia. (MPC Q62)
a stack of 5 - 60 second luminance BIN2 images taken
with iTelescope.net's (T27 TEL 0.70-m f/6.6 reflector + CCD)
By Steven M. Tilley

A confirmation image of the COMET C/2018 L2 (ATLAS)
on 2018-06-07 from Siding Spring Observatory,
Coonabarabran, NSW, Australia. (MPC Q62)
a stack of 5 - 60 second luminance BIN2 images taken
with iTelescope.net's (T27 TEL 0.70-m f/6.6 reflector + CCD)
By Steven M. Tilley



Jun 1, 2018

Confirmation Images of the COMET C/2018 K1 (Weiland)

On 2018 05 25 Henry Weiland an observer with ATLAS-MLO(Asteroid Terrestrial-impact Last Alert System ---Mauna Loa) reported a possible comet to the Minor Planet Center in Cambridge, Massachusetts, USA.  This possible comet was reported using the observer-assigned temporary designation "A1072Wf".  It was posted to the Possible Comet Confirmation Page(PCCP) and came to the attention of observer around the world. On 2018-05-26 I woke up, check iTelescope.net and saw that their facility in Siding Spring Observatory, AU was open. So had T30 started an imaging run of  60 - 60-second luminance BIN2 images and went out to eat breakfast. I got back made four stacks of 5 so can work around "stars that were in the way." I submitted my observations, as more observations came in and as the morning change to the afternoon, I saw my observations had poor residuals, so I did imaging run of  60 - 60-second luminance BIN2 images on T27.

A confirmation image of COMET C/2018 K1 (Weiland)
[was the PCCP(Possible Comet Confirmation Page)object A1072Wf] on 2018-05-26
from Siding Spring Observatory, Coonabarabran, NSW, Australia. (MPC Q62)
a stack of 5 - 60 second luminance BIN2 images taken with iTelescope.net's
(T30 TEL 0.50-m f/6.8 reflector + CCD + f/4.5 focal reducer)
By Steven M. Tilley
A confirmation image of COMET C/2018 K1 (Weiland)
[was the PCCP(Possible Comet Confirmation Page)object A1072Wf] on 2018-05-26
from Siding Spring Observatory, Coonabarabran, NSW, Australia. (MPC Q62)
a stack of 5 - 60 second luminance BIN2 images taken with iTelescope.net's
(T30 TEL 0.50-m f/6.8 reflector + CCD + f/4.5 focal reducer)
By Steven M. Tilley
A confirmation image of COMET C/2018 K1 (Weiland)
[was the PCCP(Possible Comet Confirmation Page)object A1072Wf] on 2018-05-26
from Siding Spring Observatory, Coonabarabran, NSW, Australia. (MPC Q62)
a stack of 5 - 60 second luminance BIN2 images taken with iTelescope.net's
(T30 TEL 0.50-m f/6.8 reflector + CCD + f/4.5 focal reducer)
By Steven M. Tilley
A confirmation image of COMET C/2018 K1 (Weiland)
[was the PCCP(Possible Comet Confirmation Page)object A1072Wf] on 2018-05-26
from Siding Spring Observatory, Coonabarabran, NSW, Australia. (MPC Q62)
a stack of 5 - 60 second luminance BIN2 images taken with iTelescope.net's
(T30 TEL 0.50-m f/6.8 reflector + CCD + f/4.5 focal reducer)
By Steven M. Tilley
A confirmation image of COMET C/2018 K1 (Weiland)
[was the PCCP(Possible Comet Confirmation Page)object A1072Wf] on 2018-05-26
from Siding Spring Observatory, Coonabarabran, NSW, Australia. (MPC Q62)
a stack of 5 - 60 second luminance BIN2 images taken with iTelescope.net's
(T27 TEL 0.70-m f/6.6 reflector + CCD)
By Steven M. Tilley
A confirmation image of COMET C/2018 K1 (Weiland)
[was the PCCP(Possible Comet Confirmation Page)object A1072Wf] on 2018-05-26
from Siding Spring Observatory, Coonabarabran, NSW, Australia. (MPC Q62)
a stack of 5 - 60 second luminance BIN2 images taken with iTelescope.net's
(T27 TEL 0.70-m f/6.6 reflector + CCD)
By Steven M. Tilley
A confirmation image of COMET C/2018 K1 (Weiland)
[was the PCCP(Possible Comet Confirmation Page)object A1072Wf] on 2018-05-26
from Siding Spring Observatory, Coonabarabran, NSW, Australia. (MPC Q62)
a stack of 5 - 60 second luminance BIN2 images taken with iTelescope.net's
(T27 TEL 0.70-m f/6.6 reflector + CCD)
By Steven M. Tilley
A confirmation image of COMET C/2018 K1 (Weiland)
[was the PCCP(Possible Comet Confirmation Page)object A1072Wf] on 2018-05-26
from Siding Spring Observatory, Coonabarabran, NSW, Australia. (MPC Q62)
a stack of 5 - 60 second luminance BIN2 images taken with iTelescope.net's
(T27 TEL 0.70-m f/6.6 reflector + CCD)
By Steven M. Tilley




 Background
(as of 2018-05-31)

  • Object: COMET C/2018 K1 (Weiland) 
  • Orbit Type: Halley-type Comet
  • First(Precovery) observation was made on: 2017 11 06.24388
  • First(Precovery) observation was made by:  Pan-STARRS 1, Haleakala (MPC Code F51)
  • Discovery observation was made on: 2018 05 25.54194
  • Discovery observation was made by : ATLAS-MLO, Mauna Loa  (MPC Code T08)
  • The Discovery M.P.E.C.: MPEC 2018-K117: COMET C/2018 K1 (Weiland)
  • Last Observation (publish): 2018 05 30.34974  (from Steward Observatory, Kitt Peak - Spacewatch  (MPC Code 691) ) 
  • Data-Arc Span (publish):  205 days 
  • Number of Optical Observations(published):  91
  • Observatories reporting (published) observations(MPC Code): 
    • (349) Ageo, Japan. 
    • (372) Geisei, Japan. 
    • (691) Steward Observatory, Kitt Peak - Spacewatch, US/Arizona. 
    • (E23) Arcadia, Australia/NSW. 
    • (F51) Pan-STARRS 1, Haleakala, US/Hawaii 
    • (H06) iTelescope Observatory, Mayhill, US/New Mexico 
    • (H47) Vicksburg, US/Mississippi. 
    • (I47) Pierre Auger Observatory, Malarg├╝e, Argentina. 
    • (I52) Steward Observatory, Mt. Lemmon Station US/Arizona. 
    • (Q62) iTelescope Observatory, Siding Spring, Australia/NSW.
    • (T08) ATLAS-MLO, Mauna Loa, US/Hawaii.
    • (W88) Slooh.com Chile Observatory, La Dehesa, Chile. 
    • (W96) CAO, San Pedro de Atacama (since 2013), Chile. 
    • (Y00) SONEAR Observatory, Oliveira, Brazil. 
  • Perihelion Distance 1.879151252869776 (AU) 
  • Aphelion Distance:  57.90074646767503 (AU) 
  • Earth MOID (Earth center to NEO center): 0.886103 AU (( 344.846 LD)), (20,806.64 Earth radii) or miles 82,368,419.687 ( 132,559,122.013 ( KM))[If the Earth was the size of a basketball this would be 8,210.36 Feet( 2,502.52 Meters)]

May 29, 2018

Re-Observing 2015 FP118 Another Look Almost Three Years later

When I am looking objects to observer, I try to find something within the capabilities of the telescope, interesting, and 'needing" observation. To these ends I check following lists:
On 2018-05-28 I saw  that 2015 FP118 was on both the Arecibo and Goldstone lists, needing astrometry,  and it was within the capabilities of iTelescope.net's (T27 TEL 0.70-m f/6.6 reflector + CCD) so I went for it. As I was create a directory so I could downloading the .FITS(Flexible Image Transport System) files I found out that I observed 2015 FP118  for  19.6 min on  2015-06-06.

The NEO 2015 FP118 on 2018-05-28 from
Siding Spring Observatory, Coonabarabran, NSW, Australia. (MPC Q62)
a stack of 45 - 60 second luminance BIN2 images
taken with iTelescope.net's (T27 TEL 0.70-m f/6.6 reflector + CCD)
By Steven M. Tilley

The NEO 2015 FP118 on 2015-06-06 from
 Siding Spring Observatory, Coonabarabran, NSW, Australia. (MPC Q62)
 a stack of 22 - 60 second luminance BIN2 images
taken with iTelescope.net's (T27 TEL 0.70-m f/6.6 reflector + CCD)
By Steven M. Tilley
 Background
(as of 2018-05-29)
  • Object: 2015 FP118
  • Orbit Type: Apollo [NEO, PHA]
  • Approximate Diameter: 370 m - 820 m(1213.911 feet to 2690.289 feet) (Absolute Magnitude: H= 19.3)
  • On the Sentry Risk Table: NO( Removed 2015-04-02 15:53:35)
  • On the NEODyS CLOMON2 risk page: NO 
  • Discovery observation was made on: 2015 03 21.57498
  • Discovery observation was made by Pan-STARRS 1, Haleakala (MPC Code F51) The Discovery M.P.E.C.:MPEC 2015-F132: 2015 FP118
  • Last Observation (publish): 2018 05 28.56107 (at iTelescope Observatory, Siding Spring, Australia (MPC Code Q62) )
  • Data-Arc Span (publish): 1164 days (3.19 yr) 
  • Number of Optical Observations(published):133
  • Observatories Reporting (Published) Observations(MPC Code):
    • (204) Schiaparelli Observatory,Italy. 
    • (290) Mt. Graham-VATT,US/Arizona.
    • (291) LPL/Spacewatch II,US/Arizona. 
    • (568) Mauna Kea, US/Hawaii.
    • (691) Steward Observatory, Kitt Peak - Spacewatch US/Arizona.
    • (703) Catalina Sky Survey, US/Arizona.
    • (711) McDonald Observatory, Fort Davis, US/Texas.
    • (807) Cerro Tololo Observatory, La Serena, Chile.
    • (926) Tenagra II, US/Arizona.
    • (D29) Purple Mountain Observatory, XuYi Station 
    • (F51) Pan-STARRS 1, Haleakala US/Hawaii. 
    • (G96) Mt. Lemmon Survey, US/Arizona.
    • (Q62) iTelescope Observatory, Siding Spring
  • Perihelion Distance 0.9541884017671265 (AU)
  • Aphelion Distance: 3.28765938878308 (AU)
  • Earth MOID (Earth center to NEO center): 0.029858 AU ((11.62 LD)), ( 701.09 Earth radii) or 2,775,474.494 miles ( 4,466,693.22 ( KM))[If the Earth was the size of a Basketball this would be 276.261 Feet(84.204 Meters)]
  • Next Close-Approach to Earth: Will safely pass Earth on 2018-Sep-03:
    • Minimum Distance(Earth center to NEO center) of 0.0314378825351047 (AU) (12.235  (LD)),  (738.195 Earth radii) or  2,922,333.75 miles ( 4,703,040.286 (KM)) 
    • Nominal Distance(Earth center to NEO center) of   0.031438612821003 (AU) (12.235 (LD)), (738.212 Earth radii) or  2,922,401.634  miles (4,703,149.536 (KM))
    • Maximum Distance(Earth center to NEO center) of  0.0314393431490244 (AU) (12.235 (LD)), (738.229 Earth radii) or  2,922,469.522 miles (4,703,258.791 (KM))
  • Goldstone Asteroid Schedule: Yes 2018 Sep (Needs Astrometry: Yes Needs Physical Observations: Yes)
  • On the Arecibo Asteroid Schedule:  YES,  Dates 2018 Aug (Request Optical Astrometry: YES , Request Optical  Lightcurve:YES, Request Optical Characterization YES) 

Dec 3, 2016

The NEO 2016 WJ1 Has Been Removed from the Sentry Risk Table--Neodys Risk Table List 3 Possible Impacts 2106-2115.

On December 2, 2016 at 21:33(UTC) NASA JPL removed the NEO 2016 WJ1 from the Sentry Risk Table. Whenever an object is posted to one the risk lists (especially if it has a Torino Scale 1 or greater) and it is observable, observers will take a particular interest in it. In the case of 2016 WJ1 many follow-up observations where made and  there was a search in archives for precovery observations. From  November 24, 2016  to December 2, 2016  through the work of many observers from around the world the number of optical observations went from 68  to 240 and  the data-arc span went from 5 days to  4899 days (13.41 yr). This allowed  for the calculation of orbital elements with lower uncertainty and NASA JPL rule out  potential impacts well into the future. Notice: Neodys risk table list 3 possible impacts 2106-2115.
Background
(as of 2016-12-03 )
 
  • Object: 2016 WJ1 
  • Approximate Diameter: 140 m - 310 m (459.318 feet to 1017.06 feet)(Absolute Magnitude: H= 21.382)
  • Orbit Type: Apollo [NEO]- Potentially Hazardous Asteroid
  • On the Sentry Risk Table: No Removed on 2016-12-02 21:33
  • On the NEODyS CLOMON2 risk page: yes
  • Torino Scale(NEODyS CLOMON2): 0
    • The likelihood of a collision is zero, or is so low as to be effectively zero. Also applies to small objects such as meteors and bodies that burn up in the atmosphere as well as infrequent meteorite falls that rarely cause damage."
  • First(Precovery) Observation was made: 2003 07 04.605261
  • First(Precovery) Observed By: Mauna Kea (MPC Code 568) The Precovery M.P.E.C.:MPEC 2016-X21 : 2016 WJ1
  • Discovery (First) observation was made: 2016 11 19.46522
  • Discovery (First )observed by: Mt. Lemmon Survey (MPC Code G96) The Discovery M.P.E.C.: MPEC 2016-W38 : 2016 WJ1
  • Last Observation(publish): 2016 12 02.87233
    (by Nonndorf, Austria. (MPC Code C47 )
  • Data-Arc Span(publish) : 4900 days (13.42 yr)
  • Number of Optical Observations(published): 257
  • Observatories Reporting (Published) Observations(MPC Code):
    • (151) Eschenberg Observatory, Winterthur Switzerland.  
    • (160) Castelmartini,Italy.
    • (203) GiaGa Observatory,Italy.
    • (246) Klet Observatory-KLENOT, Czech Republic.
    • (291) LPL/Spacewatch II,US/Arizona. 
    • (568) Mauna Kea,US/Hawaii.
    • (691) Steward Observatory, Kitt Peak-Spacewatch, US/Arizona.
    • (926) Tenagra II Observatory, Nogales,US/Arizona.  
    • (958) Observatoire de Dax, France.
    • (A17) Guidestar Observatory, Weinheim,Germany.
    • (A48) Povegliano Veronese,Italy.
    • (C47) Nonndorf, Austria.
    • (C77) Bernezzo Observatory, Italy.
    • (E10) Siding Spring-Faulkes Telescope South, Australia/NSW.
    • (F51) Pan-STARRS 1, Haleakala, US/Hawaii.
    • (G96) Mt. Lemmon Survey, US/Arizona.
    • (H06) iTelescope Observatory, Mayhill, US/New Mexico.  
    • (H21) Astronomical Research Observatory, Westfield, US/Illinois.
    • (H45) Arkansas Sky Obs., Petit Jean Mountain South, US/Arkansas.
    • (I52) Steward Observatory, Mt. Lemmon Station,US/Arizona.
    • (J04) ESA Optical Ground Station, Tenerife, Canary Islands (Spain).
    • (J69) North Observatory, Clanfield,UK.
    • (K38) M57 Observatory, Saltrio,Italy.
    • (K61) Rokycany Observatory,Czech Republic.
    • (K65) Cesena,Italy.
    • (K74) Muensterschwarzach Observatory, Schwarzach, Germany.
    • (K88) GINOP-KHK, Piszkesteto, Hungary.
    • (L04) ROASTERR-1 Observatory, Cluj-Napoca, Romania.
    • (Q62) iTelescope Observatory, Siding Spring, Australia/NSW.
    • (T05) ATLAS-HKO, Haleakala, US/Hawaii.
    • (T12) Mauna Kea-UH/Tholen NEO Follow-U (2.24-m),US/Hawaii.
    • (W25) RMS Observatory, Cincinnati,US/Ohio.
    • (W88) Slooh.com Chile Observatory, La Dehesa,Chile.
    • (Y28) OASI, Nova Itacuruba, Brazil.
    • (Z80) Northolt Branch Observatory,UK..
  • Perihelion Distance: 0.6654428764236301  (AU)
  • Aphelion Distance: 2.013952506814137 (AU)
  • Earth MOID: 0.000339358 AU (0.132 (LD)) or 31,545.297 miles (50,767.234 (KM))
  • Close-Approach to Earth: Will safely pass Earth on 2016-December-16 at a Nominal Distance of  0.0538116295342834 (AU) (20.942 (LD)) or 5,004,610.672 miles (8,054,140.158 (KM))
To illustrate on how the addition of observation can lower the uncertainty of orbital elements here is three
screenshot of Find_Orb showing elements and their uncertainty
 
A screenshot of Find_Orb showing orbital elements and uncertainty
 before the addition of the precovery observation.
(2 observationobservation are rejected as outliers) 
Orbital elements:  2016 WJ1
   Perihelion 2017 Feb 7.453335 +/- 0.0146 TT = 10:52:48 (JD 2457791.953335)
Epoch 2017 Feb 16.0 TT = JDT 2457800.5   Earth MOID: 0.0004   Ve: 0.0023
M   5.42420715 +/- 0.0053           Ma: 0.0027                Find_Orb
n   0.63465774060 +/- 0.000456      Peri.   87.68828816 +/- 0.0057
a   1.34104390016 +/- 0.000642      Node    82.04709113 +/- 0.0023
e   0.5040907493 +/- 0.000384       Incl.    2.89419977 +/- 0.0022
P   1.55/567.22d           H 21.3   G  0.15   U  7.6  
q 0.66503607568 +/- 0.000196    Q 2.01705172465 +/- 0.00148
233 of 235 observations 2016 Nov. 19-Dec. 1; mean residual 0".32
 
A screenshot of Find_Orb showing orbital elements and uncertainty 
after the addition of the precovery observation.
(2 observationobservation are rejected as outliers) 
 
Orbital elements:  2016 WJ1
   Perihelion 2017 Feb 7.484044 +/- 0.000243 TT = 11:37:01 (JD 2457791.984044)
Epoch 2017 Feb 16.0 TT = JDT 2457800.5   Earth MOID: 0.0004   Ve: 0.0024
M   5.41286498 +/- 0.00015          Ma: 0.0027                Find_Orb
n   0.63561447057 +/- 1.52e-7       Peri.   87.67637253 +/- 0.00017
a   1.33969786518 +/- 2.14e-7       Node    82.05217334 +/- 0.00022
e   0.5032874712 +/- 8.64e-7        Incl.    2.88944734 +/- 0.000020
P   1.55/566.37d           H 21.3   G  0.15   U  2.3  
q 0.66544471439 +/- 1.26e-6    Q 2.01395101596 +/- 8.71e-7
238 of 240 observations 2003 July 4-2016 Dec. 1; mean residual 0".32
 
A screenshot of Find_Orb showing orbital elements and uncertainty 
with all published observation.
(2 observationobservation are rejected as outliers) 

Orbital elements:  2016 WJ1
   Perihelion 2017 Feb 7.484067 +/- 0.000172 TT = 11:37:03 (JD 2457791.984067)
Epoch 2017 Feb 16.0 TT = JDT 2457800.5   Earth MOID: 0.0004   Ve: 0.0024
M   5.41285007 +/- 0.00010          Ma: 0.0027                Find_Orb
n   0.63561448686 +/- 1.18e-7       Peri.   87.67634890 +/- 0.00015
a   1.33969784228 +/- 1.66e-7       Node    82.05222716 +/- 0.00017
e   0.5032875546 +/- 7.26e-7        Incl.    2.88944241 +/- 0.000019
P   1.55/566.37d           H 21.3   G  0.15   U  2.1  
q 0.66544459133 +/- 1.05e-6    Q 2.01395109323 +/- 7.49e-7
255 of 257 observations 2003 July 4-2016 Dec. 2; mean residual 0".31
 Useful Links: 

Dec 1, 2016

The NEO 2016 WJ1 on 2016-12-01 from Siding Spring - Australia

See The NEO 2016 WJ1 Has Been Removed from the Sentry Risk Table--Neodys Risk Table List 3 Possible Impacts 2106-2115.

NOTE with only 12 days data-arc span there is "little" known about the NEO 2016 WJ1 and the information in this post may become outdated. So one should always check the links for updates. Whenever an object is posted to one the risk lists (especially if it has a Torino Scale 1 or greater) and it is observable, observers will take a particular interest in it. In the coming days it is possible there will be more follow-up observations and a search in archives for precovery observations. It is MOST likely this object will be removed from the risk lists. It could take observations over one or more orbital periods before we can reliably say where it will be from 2030 to 2108.
Background
(as of 2016-12-01 9:50am CST)
 
  • Object: 2016 WJ1 
  • Approximate Diameter: 140 m - 310 m (459.318 feet to 1017.06 feet)(Absolute Magnitude: H= 21.402)
  • Orbit Type: Apollo [NEO]- Potentially Hazardous Asteroid
  • On the Sentry Risk Table: yes  NO
  •  Torino Scale(JPL): 1 
    • "A routine discovery in which a pass near the Earth is predicted that poses no unusual level of danger. Current calculations show the chance of collision is extremely unlikely with no cause for public attention or public concern. New telescopic observations very likely will lead to re-assignment to Level 0"
  • On the NEODyS CLOMON2 risk page: yes
  • Torino Scale(NEODyS CLOMON2): 1
  • First observation was made: 2016 11 19.46522
  • First observed by: Mt. Lemmon Survey (MPC Code G96) The Discovery M.P.E.C.: MPEC 2016-W38 : 2016 WJ1
  • Last Observation(publish): 2016 12 01.48096 (by iTelescope Observatory  (MPC Code Q62)
  • Data-Arc Span(publish) : 12 days
  • Number of Optical Observations(published): 222
  • Observatories Reporting (Published) Observations(MPC Code):
    • (151) Eschenberg Observatory, Winterthur, Switzerland. 
    • (203) GiaGa Observatory, Italy.  
    • (246) Klet Observatory-KLENOT, Czech Republic.  
    • (291) LPL/Spacewatch II,Arizona,US. 
    • (691) Steward Observatory, Kitt Peak-Spacewatch, Arizona,US.
    • (926) Tenagra II Observatory, Nogales,Arizona,US. 
    • (958) Observatoire de Dax,France.
    • (A17) Guidestar Observatory, Weinheim, Germany.
    • (A48) Povegliano Veronese,Italy.
    • (C47) Nonndorf, Austria.
    • (E10) Siding Spring-Faulkes Telescope South, NSW,Australia.
    • (F51) Pan-STARRS 1, Haleakala,Hawaii,US. 
    • (G96) Mt. Lemmon Survey, Arizona,US.
    • (H06) iTelescope Observatory, Mayhill,New Mexico,US.
    • (H21) Astronomical Research Observatory, Westfield,Illinois,US.
    • (H45) Arkansas Sky Obs., Petit Jean Mountain South,Arizona,US. 
    • (I52) Steward Observatory, Mt. Lemmon Station, Arizona,US.
    • (J04) ESA Optical Ground Station, Tenerife, Canary Islands, Spain.
    • (J69) North Observatory, Clanfield, UK.
    • (K38) M57 Observatory, Saltrio, Italy.
    • (K61) Rokycany Observatory,Czech Republic.
    • (K65) Cesena Italy.
    • (K74) Muensterschwarzach Observatory, Schwarzach, Germany.
    • (K88) GINOP-KHK, Piszkesteto,Hungary.
    • (L04) ROASTERR-1 Observatory, Cluj-Napoca,Romania.
    • (Q62) iTelescope Observatory, Siding Spring, NSW,Australia.   
    • (T05) ATLAS-HKO, Haleakala,Hawaii,US.
    • (T12) Mauna Kea-UH/Tholen NEO Follow-U, Hawaii,US.
    • (W88) Slooh.com Chile Observatory, La Dehesa,Chile.
    • (Y28) OASI, Brazil.
    • (Z80) Northolt Branch Observatory, UK.
    • .
  • Perihelion Distance: .6653138187201434 (AU)
  • Aphelion Distance: 2.01493605513458 (AU)
  • Earth MOID: 0.000339608 AU (0.132 (LD)) or 31,568.536 miles (50,804.634 (KM))
  • Close-Approach to Earth: Will safely pass Earth on 2016-December-16 at a Nominal Distance of  0.0538386015810167 (AU) (20.952 (LD)) or 5,004,610.672 miles (8,054,140.158 (KM))

A image of the NEO 2016 WJ1 on 2016-12-01
from Siding Spring Observatory, Coonabarabran, NSW, Australia. (MPC Q62)
a stack of  3 - 60 second luminance BIN2 images taken with iTelescope.net's
(TEL T27 0.70-m f/6.6 reflector + CCD)
(C) Steven M. Tilley
A image of the NEO 2016 WJ1 on 2016-12-01
from Siding Spring Observatory, Coonabarabran, NSW, Australia. (MPC Q62)
a stack of  3 - 60 second luminance BIN2 images taken with iTelescope.net's
(TEL T27 0.70-m f/6.6 reflector + CCD)
(C) Steven M. Tilley
A image of the NEO 2016 WJ1 on 2016-12-01
from Siding Spring Observatory, Coonabarabran, NSW, Australia. (MPC Q62)
a stack of  3 - 60 second luminance BIN2 images taken with iTelescope.net's
(TEL T27 0.70-m f/6.6 reflector + CCD)
(C) Steven M. Tilley
A image of the NEO 2016 WJ1 on 2016-12-01
from Siding Spring Observatory, Coonabarabran, NSW, Australia. (MPC Q62)
a stack of  3 - 60 second luminance BIN2 images taken with iTelescope.net's
(TEL T27 0.70-m f/6.6 reflector + CCD)
(C) Steven M. Tilley
 Useful Links: 

Nov 26, 2016

The NEO 2016 WJ1 on 2016-11-25 from Siding Spring - Australia

See The NEO 2016 WJ1 Has Been Removed from the Sentry Risk Table--Neodys Risk Table List 3 Possible Impacts 2106-2115.

NOTE with only 6 days data-arc span there is "little" known about the NEO 2016 WJ1 and the information in this post may become outdated. So one should check the links for updates. Whenever an object is posted to one the risk lists (especially if it has a Torino Scale 1 or greater) and it is observable, observers will take a particular interest in it. In the coming days it is possible there will be more follow-up observations and a search in archives for precovery observations. It is likely this object will be removed from the risk lists.
Background
(as of 2016-11-25)
 
  • Object: 2016 WJ1 
  • Approximate Diameter: 140  m - 320  m (459.318 feet to 1049.87 feet)(Absolute Magnitude: H= 21.338)
  • Orbit Type: Apollo [NEO]- Potentially Hazardous Asteroid
  • On the Sentry Risk Table: yes  NO
  •  Torino Scale(JPL): 1 
    • "A routine discovery in which a pass near the Earth is predicted that poses no unusual level of danger. Current calculations show the chance of collision is extremely unlikely with no cause for public attention or public concern. New telescopic observations very likely will lead to re-assignment to Level 0"
  • On the NEODyS CLOMON2 risk page: yes
  • Torino Scale(NEODyS CLOMON2): 1
  • First observation was made: 2016 11 19.46522
  • First observed by: Mt. Lemmon Survey (MPC Code G96) The Discovery M.P.E.C.: MPEC 2016-W38 : 2016 WJ1
  • Last Observation(publish): 2016 11 25.183886 (by OASI, Nova ItacurubaI (MPC Code Y28)
  • Data-Arc Span(publish) : 6 days
  • Number of Optical Observations(published): 80
  • Observatories Reporting (Published) Observations(MPC Code):
    • (246) Klet Observatory-KLENOT,Czech Republic. 
    • (291) LPL/Spacewatch II,Arizona,US. 
    • (691) Steward Observatory, Kitt Peak-Spacewatch, Arizona,US.
    • (926) Tenagra II Observatory, Nogales,Arizona, US. 
    • (958) Observatoire de Dax, France.
    • (G96) Mt. Lemmon Survey, Arizona,US. 
    • (H06) iTelescope Observatory, Mayhill,New Mexico,US.
    • (H21) Astronomical Research Observatory, Westfield, Illinois,US.
    • (I52) Steward Observatory, Mt. Lemmon Station,Arizona,US.
    • (K88) GINOP-KHK, Piszkesteto, Hungary.
    • (L04) ROASTERR-1 Observatory, Cluj-Napoca, Romania.
    • (Q62) iTelescope Observatory, Siding Spring,NSW,Australia. 
    • (T12) Mauna Kea-UH/Tholen NEO Follow-U, Hawaii,US.
    • (Y28) OASI, Nova Itacuruba, Brazil.
  • Perihelion Distance: 0.6643788245227231 (AU)
  • Aphelion Distance: 2.019174401968141 (AU)
  • Earth MOID: 0.000357041 AU ( 0.139 (LD)) or 33,189.034 miles (53,412.573 (KM))
  • Close-Approach to Earth: Will safely pass Earth on 2016-December-16 at a Nominal Distance of  0.05398437711059 (AU) (21.009 (LD)) or 5,018,161.354 miles (8,075,947.866 (KM))

A image of the NEO 2016 WJ1 on 2016-11-25
from Siding Spring Observatory, Coonabarabran, NSW, Australia. (MPC Q62)
a stack of 5 - 60 second luminance BIN2 images taken with iTelescope.net's
(TEL T27 0.70-m f/6.6 reflector + CCD)
(C) Steven M. Tilley
A image of the NEO 2016 WJ1 on 2016-11-25
from Siding Spring Observatory, Coonabarabran, NSW, Australia. (MPC Q62)
a stack of 5 - 60 second luminance BIN2 images taken with iTelescope.net's
(TEL T27 0.70-m f/6.6 reflector + CCD)
(C) Steven M. Tilley
A image of the NEO 2016 WJ1 on 2016-11-25
from Siding Spring Observatory, Coonabarabran, NSW, Australia. (MPC Q62)
a stack of 5 - 60 second luminance BIN2 images taken with iTelescope.net's
(TEL T27 0.70-m f/6.6 reflector + CCD)
(C) Steven M. Tilley
Useful Links: 

Nov 25, 2016

The NEO 2016 WJ1 on 2016-11-24 from Siding Spring - Australia

See The NEO 2016 WJ1 Has Been Removed from the Sentry Risk Table--Neodys Risk Table List 3 Possible Impacts 2106-2115.

NOTE with only 4 days data-arc span there is "little" known about the NEO 2016 WJ1 and the information in this post may become outdated. So one should check the links for updates. Whenever an object is posted to one the risk lists (especially if it has a Torino Scale 1 or greater) and it is observable, observers will take a particular interest in it. In the coming days it is possible there will be more follow-up observations and a search in archives for precovery observations. It is likely this object will be removed from the risk lists.
Background
(as of 2016-11-24)
 
  • Object: 2016 WJ1 
  • Approximate Diameter: 140  m - 320  m (459.318 feet to 1049.87 feet)(Absolute Magnitude: H= 21.328)
  • Orbit Type: Apollo [NEO]- Potentially Hazardous Asteroid
  • On the Sentry Risk Table: yes NO 
  •  Torino Scale(JPL): 1 
    • "A routine discovery in which a pass near the Earth is predicted that poses no unusual level of danger. Current calculations show the chance of collision is extremely unlikely with no cause for public attention or public concern. New telescopic observations very likely will lead to re-assignment to Level 0"
  • On the NEODyS CLOMON2 risk page: yes
  • Torino Scale(NEODyS CLOMON2): 1
  • First observation was made: 2016 11 19.46522
  • First observed by: Mt. Lemmon Survey (MPC Code G96) The Discovery M.P.E.C.: MPEC 2016-W38 : 2016 WJ1
  • Last Observation(publish): 2016 11 24.49274 (by LPL/Spacewatch II (MPC Code 291)
  • Data-Arc Span(publish) : 5 days
  • Number of Optical Observations(published): 68
  • Perihelion Distance: 0.6646977875617796 (AU)
  • Aphelion Distance: 2.016698875781032 (AU)
  • Earth MOID: 0.000378886 AU ( 0.147 (LD)) or 35,219.654 miles (56,680.539 (KM))
  • Close-Approach to Earth: Will safely pass Earth on 2016-December-16 at a Nominal Distance of  0.0539141743012569 (AU) (20.982 (LD)) or 5,011,635.595 miles (8,065,445.676 (KM))

A image of the NEO 2016 WJ1 on 2016-11-24
from Siding Spring Observatory, Coonabarabran, NSW, Australia. (MPC Q62)
a stack of 5 - 60 second luminance BIN2 images taken with iTelescope.net's
(TEL T27 0.70-m f/6.6 reflector + CCD)
(C) Steven M. Tilley
  
A image of the NEO 2016 WJ1 on 2016-11-24
from Siding Spring Observatory, Coonabarabran, NSW, Australia. (MPC Q62)
a stack of 5 - 60 second luminance BIN2 images taken with iTelescope.net's
(TEL T27 0.70-m f/6.6 reflector + CCD)
(C) Steven M. Tilley
Useful Links:

Nov 18, 2016

Images of The Asteroid 2016 UG on 2016-11-15 and 2016-11-16

Asteroid(and comet) observing is done by taking a series of images of a section of the night sky over a period of time with a telescope and CCD. Then data reduction is performed on the images looking for moving objects. The observer needs to make two or more observation for each moving object. All “known” objects have a designation, if the observer knows the object’s designation the observation can be reported using the object's designation. If the observer is not trying to identify objects, it is an unknown object or if there is any doubt, an observer-assigned temporary designation is used. The Minor Planet Center’s(MPC) computers check to see if any observations reported  with an observer-assigned temporary designation matchs a “known” objects,  If  any are  "unknown" and its "NEO score is 65” it is posted to “The NEOConfirmation Page”(NEOCP)

Many observers watch the NEOCP and do follow-up observation on listed objects.   As more observational data comes in better orbital elements can be generated, the "unknown" object may be shown to be a "known" object or shown to be a "new" object. When there are enough observations to generate useful orbital elements the object is assigned a provisional designation by the Minor Planet Center if the object is a NEO, a comet, or unusual a Minor Planet Electronic Circular will be issued.  It is possible over time with additional observational data two or more provisional designations maybe link showing they are the same object.   After four well-observed oppositions for main-belt (two to three for NEOs), asteroids are given a  number ( or their permanent designation and they are eligible to be named by the discoverer).

While many observers will targete NEOs for follow-up observations however other asteroids( i.e., Mars-crossers, main-belt, etc.) may be neglected and over time may become "lost."  On 2016-10-19  a new object was found by Pan-STARRS 1, it was posted to the NEOCP.  Three more observatories submitted observations, and on 2016-10-20.92 it was shown to be a Mars-crossing asteroid and the MPC assigned it the provisional designation 2016 UG.  Since it was not a NEO and pose no danger to Earth, no one targeted it for any follow-up observations.  Then on 2016-11-14 Pan-STARRS 1 reported observations for an object under an observer-assigned temporary designation and it was posted to the NEOCP.  Then observations were reported from two more observatories(including myself), and on 2016-11-16.06 the  "new" NEOCP object was shown to be the Mars-crossing asteroid, 2016 UG  and the orbital elements were updated.

Observations Made Before  the  Object  Was Updates.

A image of the asteroid 2016 UG on 2016-11-15
from Siding Spring Observatory, Coonabarabran, NSW, Australia. (MPC Q62)
a stack of 5 - 120 second luminance BIN2 images taken with iTelescope.net's
(TEL T27 0.70-m f/6.6 reflector + CCD)
(C) Steven M. Tilley
A image of the asteroid 2016 UG on 2016-11-15
from Siding Spring Observatory, Coonabarabran, NSW, Australia. (MPC Q62)
a stack of 5 - 120 second luminance BIN2 images taken with iTelescope.net's
(TEL T27 0.70-m f/6.6 reflector + CCD)
(C) Steven M. Tilley
A image of the asteroid 2016 UG on 2016-11-15
from Siding Spring Observatory, Coonabarabran, NSW, Australia. (MPC Q62)
a stack of 5 - 120 second luminance BIN2 images taken with iTelescope.net's
(TEL T27 0.70-m f/6.6 reflector + CCD)
(C) Steven M. Tilley
A image of the asteroid 2016 UG on 2016-11-15
from Siding Spring Observatory, Coonabarabran, NSW, Australia. (MPC Q62)
a stack of 15 - 120 second luminance BIN2 images taken with iTelescope.net's
(TEL T27 0.70-m f/6.6 reflector + CCD)
(C) Steven M. Tilley
Observations Made After  the  Object  Was Updates.
A image of the asteroid 2016 UG on 2016-11-16
 from Siding Spring Observatory, Coonabarabran, NSW, Australia. (MPC Q62)
 a stack of 5 - 120 second luminance BIN2 images taken with iTelescope.net's 
(TEL T27 0.70-m f/6.6 reflector + CCD)
 (C) Steven M. Tilley


A image of the asteroid 2016 UG on 2016-11-16
 from Siding Spring Observatory, Coonabarabran, NSW, Australia. (MPC Q62)
 a stack of 5 - 120 second luminance BIN2 images taken with iTelescope.net's 
(TEL T27 0.70-m f/6.6 reflector + CCD)
 (C) Steven M. Tilley
A image of the asteroid 2016 UG on 2016-11-16
 from Siding Spring Observatory, Coonabarabran, NSW, Australia. (MPC Q62)
 a stack of 15 - 120 second luminance BIN2 images taken with iTelescope.net's 
(TEL T27 0.70-m f/6.6 reflector + CCD)
 (C) Steven M. Tilley
Background 
(as of 2016-11-17)