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Showing posts with label MPC Code H06. Show all posts
Showing posts with label MPC Code H06. Show all posts

May 11, 2018

The NEO 2010 WC9 on 2018-05-10

The NEO 2010 WC9 on 2018-05-10 from Mayhill, New Mexico [New Mexico Skies](MPC Code H06)
 a stack of 13-60 Second Luminance BIN2 Images taken with iTelescope.net's
(T11 TEL 0.50-m f/6.8 reflector + CCD + f/4.5 focal reducer)
By Steven M. Tilley
The NEO 2010 WC9 on 2018-05-10 from Mayhill, New Mexico [New Mexico Skies](MPC Code H06)
 a stack of 13-60 Second Luminance BIN2 Images taken with iTelescope.net's
(T11 TEL 0.50-m f/6.8 reflector + CCD + f/4.5 focal reducer)
By Steven M. Tilley
The NEO 2010 WC9 on 2018-05-10 from Mayhill, New Mexico [New Mexico Skies](MPC Code H06)
 a stack of 13-60 Second Luminance BIN2 Images taken with iTelescope.net's
(T11 TEL 0.50-m f/6.8 reflector + CCD + f/4.5 focal reducer)
By Steven M. Tilley

If the  Earth was the Size of a basketball the flyby of the asteroid 2010 WC9  would be ~3.7 Meters(~12.2 feet) away. https://goo.gl/3SXrMg

Apr 6, 2018

The NEO 2018 BY2 - Information Sheet

The NEO 2018 BY2 on 2018-03-31 from Mayhill, New Mexico
(New Mexico Skies) - (MPC Code H06) a stack of 9 - 20 Second Luminance 
BIN2 Images taken with iTelescope.net's
(T21 TEL 0.43-m f/6.8 reflector + CCD + f/4.5 focal reducer)

By Steven M. Tilley
The NEO 2018 BY2 on 2018-03-31 from Mayhill, New Mexico
(New Mexico Skies) - (MPC Code H06) a stack of 9 - 20 Second Luminance 
BIN2 Images taken with iTelescope.net's
(T21 TEL 0.43-m f/6.8 reflector + CCD + f/4.5 focal reducer)

By Steven M. Tilley
The NEO 2018 BY2 on 2018-03-31 from Mayhill, New Mexico
(New Mexico Skies) - (MPC Code H06) a stack of 9 - 20 Second Luminance 
BIN2 Images taken with iTelescope.net's
(T21 TEL 0.43-m f/6.8 reflector + CCD + f/4.5 focal reducer)

By Steven M. Tilley
The NEO 2018 BY2 on 2018-03-31 from Mayhill, New Mexico
(New Mexico Skies) - (MPC Code H06) a stack of 9 - 20 Second Luminance 
BIN2 Images taken with iTelescope.net's
(T21 TEL 0.43-m f/6.8 reflector + CCD + f/4.5 focal reducer)

By Steven M. Tilley
The NEO 2018 BY2 on 2018-04-02 from Sierra Remote Observatory,
Auberry, California, USA (MPC U69) a stack of 10 - 15 Second Luminance BIN2 Images
taken with iTelescope.net's (T24 TEL 0.61-m f/6.5 reflector + CCD) 
By Steven M. Tilley
The NEO 2018 BY2 on 2018-04-02 from Sierra Remote Observatory,
Auberry, California, USA (MPC U69) a stack of 10 - 15 Second Luminance BIN2 Images 
taken with iTelescope.net's (T24 TEL 0.61-m f/6.5 reflector + CCD) 
By Steven M. Tilley
The NEO 2018 BY2 on 2018-04-02 from Sierra Remote Observatory,
Auberry, California, USA (MPC U69) a stack of 10 - 15 Second Luminance BIN2 Images 
taken with iTelescope.net's (T24 TEL 0.61-m f/6.5 reflector + CCD) 
By Steven M. Tilley
The NEO 2018 BY2 on 2018-04-02 from Sierra Remote Observatory,
Auberry, California, USA (MPC U69) a stack of 10 - 15 Second Luminance BIN2 Images 
taken with iTelescope.net's (T24 TEL 0.61-m f/6.5 reflector + CCD) 
By Steven M. Tilley
The NEO 2018 BY2 on 2018-04-02 from Sierra Remote Observatory,
Auberry, California, USA (MPC U69) a stack of 10 - 15 Second Luminance BIN2 Images 
taken with iTelescope.net's (T24 TEL 0.61-m f/6.5 reflector + CCD) 
By Steven M. Tilley
The NEO 2018 BY2 on 2018-04-05 from Siding Spring Observatory,
Coonabarabran, NSW, Australia. (MPC Q62) a stack of 20 - 15 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 2018 BY2 on 2018-04-05 from Siding Spring Observatory,
Coonabarabran, NSW, Australia. (MPC Q62) a stack of 20 - 15 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 2018 BY2 on 2018-04-05 from Siding Spring Observatory,
Coonabarabran, NSW, Australia. (MPC Q62) a stack of 20 - 15 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 2018 BY2 on 2018-04-05 from Siding Spring Observatory,
Coonabarabran, NSW, Australia. (MPC Q62) a stack of 20 - 15 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 2018 BY2 on 2018-04-05 from Siding Spring Observatory,
Coonabarabran, NSW, Australia. (MPC Q62) a stack of 20 - 15 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 2018-04-06)
  • Object: 2018 BY2
  • Orbit Type: Apollo [NEO, PHA]
  • Approximate Diameter: 210 m - 470 m ( 688.976  feet to 1541.995  feet) (Absolute Magnitude: H= 20.5)
  • On the Sentry Risk Table: NO
  • On the NEODyS CLOMON2 risk page: NO 
  • First(Precovery) Observation was made: 2018 01 03.45659
  • Discovery observation was made on: 2018 01 17.31782
  • Discovery observation was made by Pan-STARRS 1, Haleakala (MPC Code F51) The Discovery M.P.E.C.:MPEC 2018-B85 : 2018 BY2
  • Last Observation (publish): 2018 04 05.42579 (at iTelescope Observatory, Siding Spring,  Australia (MPC Code Q62) )
  • Data-Arc Span (publish):  days 92
  • Number of Optical Observations(published):146
  • Observatories Reporting (Published) Observations(MPC Code):
    • (246) Klet Observatory-KLENOT, Czech Republic.
    • (474) Mount John Observatory, Lake Tekapo, New Zealand. 
    • (568) Mauna Kea, US/Hawaii. 
    • (587) Sormano, Italy. 
    • (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.
    • (A48) Povegliano Veronese, Italy.
    • (B74) Santa Maria de Montmagastrell, Spain.
    • (F51) Pan-STARRS 1, Haleakala,US/Hawaii.
    • (H01) Magdalena Ridge Observatory, Socorro, US/New Mexico. 
    • (H06) iTelescope Observatory, Mayhill, US/New Mexico.
    • (H21) Astronomical Research Observatory, Westfield, US/Illinois.
    • (H36) Sandlot Observatory, Scranton, US/Kansas.
    • (H45) Arkansas Sky Obs., Petit Jean Mountain South, US/Arkansas.
    • (I52) Steward Observatory, Mt. Lemmon Station,US/Arizona.
    • (K61) Rokycany Observatory, Czech Republic.
    • (L04) ROASTERR-1 Observatory, Cluj-Napoca, Romania.
    • (Q62) iTelescope Observatory, Siding Spring, Australia/NSW.
    • (T05) ATLAS-HKO, Haleakala, US/Hawaii.
    • (U69) iTelescope SRO Observatory, Auberry,
    • (W89) Cerro Tololo-LCO Aqawan A #1, Chile.
  • Perihelion Distance 1.014723117954455 (AU)
  • Aphelion Distance: 2.264719569328387 (AU)
  • Earth MOID (Earth center to NEO center): 0.04159 AU ((16.186 LD)), ( 975.57 Earth radii) or 3,866,032.024  miles ( 6,221,775.442 ( KM))
  • Next Close-Approach to Earth:  Will safely pass Earth on 2018-Apr-11:
    • Minimum Distance(Earth center to NEO center) of  0.0609381959952516 (AU) ( 23.715 (LD)), 1429.89 (Earth radii) or  5,664,559.202  miles ( 9,116,224.365(KM)) 
    • Nominal Distance(Earth center to NEO center) of 0.0609437887594874 (AU) ( 23.718 (LD)), (1430.02  Earth radii) or 5,665,079.082 miles ( 9,117,061.03 (KM))
    • Maximum Distance(Earth center to NEO center) of  0.0609493815227982 (AU) ( 23.72 (LD)), (1430.156443 Earth radii) or 5,665,598.962 miles (9,117,897.696 (KM))   

Jun 19, 2017

Confirmation Images of The NEO 2017 MC

A confirmation images of the NEO 2017 MC on 2017-06-18
from Mayhill, New Mexico (New Mexico Skies) (MPC Code H06),
a stack of 5-30 Second Luminance BIN2 Images taken with itelescope.net's
(TEL T11 0.50-m f/6.8 reflector + CCD + f/4.5 focal reducer)
(c) Steven M. Tilley
A confirmation images of the NEO 2017 MC on 2017-06-18
from Mayhill, New Mexico (New Mexico Skies) (MPC Code H06),
a stack of 5-30 Second Luminance BIN2 Images taken with itelescope.net's
(TEL T11 0.50-m f/6.8 reflector + CCD + f/4.5 focal reducer)
(c) Steven M. Tilley
A confirmation images of the NEO 2017 MC on 2017-06-18
from Mayhill, New Mexico (New Mexico Skies) (MPC Code H06),
a stack of 5-30 Second Luminance BIN2 Images taken with itelescope.net's
(TEL T11 0.50-m f/6.8 reflector + CCD + f/4.5 focal reducer)
(c) Steven M. Tilley
A confirmation images of the NEO 2017 MC on 2017-06-18
from Mayhill, New Mexico (New Mexico Skies) (MPC Code H06),
a stack of 5-30 Second Luminance BIN2 Images taken with itelescope.net's
(TEL T11 0.50-m f/6.8 reflector + CCD + f/4.5 focal reducer)
(c) Steven M. Tilley
A confirmation images of the NEO 2017 MC on 2017-06-18
from Mayhill, New Mexico (New Mexico Skies) (MPC Code H06),
a stack of 50-30 Second Luminance BIN2 Images taken with itelescope.net's
(TEL T11 0.50-m f/6.8 reflector + CCD + f/4.5 focal reducer)
(c) Steven M. Tilley
A confirmation images of the NEO 2017 MC on 2017-06-18
from Siding Spring Observatory, Coonabarabran, NSW, Australia (MPC Code Q62),
a stack of 20-30 Second Luminance BIN2 Images taken with itelescope.net's
(TEL T31 0.50-m f/6.8 reflector + CCD + f/4.5 focal reducer)
(c) Steven M. Tilley
A confirmation images of the NEO 2017 MC on 2017-06-18
from Siding Spring Observatory, Coonabarabran, NSW, Australia (MPC Code Q62),
a stack of 20-30 Second Luminance BIN2 Images taken with itelescope.net's
(TEL T31 0.50-m f/6.8 reflector + CCD + f/4.5 focal reducer)
(c) Steven M. Tilley
A confirmation images of the NEO 2017 MC on 2017-06-18
from Siding Spring Observatory, Coonabarabran, NSW, Australia (MPC Code Q62),
a stack of 20-30 Second Luminance BIN2 Images taken with itelescope.net's
(TEL T31 0.50-m f/6.8 reflector + CCD + f/4.5 focal reducer)
(c) Steven M. Tilley
A confirmation images of the NEO 2017 MC on 2017-06-18
from Siding Spring Observatory, Coonabarabran, NSW, Australia (MPC Code Q62),
a stack of 60-30 Second Luminance BIN2 Images taken with itelescope.net's
(TEL T31 0.50-m f/6.8 reflector + CCD + f/4.5 focal reducer)
(c) Steven M. Tilley

Background

(as of 2017-06-18)
  • Object: 2017 MC
  • Approximate Diameter:  150 m - 380 m ( 492.126 feet to feet 1246.72)(Absolute Magnitude: H= 21.021)
  • Orbit Type: Apollo [NEO] Potentially Hazardous Asteroid
  • On the Sentry Risk Table: NO
  • On the NEODyS CLOMON2 risk page: NO
  • Discovery (First) observation was made: 2017 06 16.53663
  • Discovery (First )observation was made by:  ATLAS-MLO(Asteroid Terrestrial-impact Last Alert System)(MPC Code  T08) The Discovery M.P.E.C.: MPEC 2017-M15 : 2017 MC
  • Last Observation(publish) was made: 2017 06 18.64005 (by iTelescope Observatory, Siding Spring   (MPC Code Q62 )
  • Data-Arc Span(publish) :  2 days
  • Number of Optical Observations(published) : 76 
  • Observatories Reporting (Published) Observations(MPC Code):
    • (104) San Marcello Pistoiese, Italy.
    • (160) Castelmartini, Italy.
    • (204) Schiaparelli Observatory, Italy.
    • (595) Farra d'Isonzo, Italy.
    • (926) Tenagra II Observatory, Nogales, US/Arizona.
    • (B49) Paus Observatory, Sabadell, Spain.
    • (B74) Santa Maria de Montmagastrell, Spain.
    • (C23) Olmen,Belgium.
    • (H06) iTelescope Observatory, Mayhill, US/New Mexico.
    • (I93) St Pardon de Conques (N44.558708 W0.203000) France.
    • (J69) North Observatory, Clanfield (N50.939011 W1.019700) UK.
    • (J95) Great Shefford,UK.
    • (K38) M57 Observatory, Saltrio, Italy.
    • (K63) G. Pascoli Observatory, Castelvecchio Pascoli, Italy.
    • (K88) GINOP-KHK, Piszkesteto, Hungary.
    • (Q62) iTelescope Observatory, Siding Spring, Australia/NSW.
    • (T08) ATLAS-MLO, Mauna Loa,US/Hawaii.
    • (W25) RMS Observatory, Cincinnati,US/Ohio.
    • (W34) Squirrel Valley Observatory, Columbus, US/North Carolina.
    • (Y00) SONEAR Observatory, Oliveira, Brazil.

Dec 7, 2016

The NEO 2016 WJ1 on 2016-12-06 from Mayhill, New Mexico

Background
(as of 2016-12-06 ) 
  • Object: 2016 WJ1
  • Approximate Diameter: 140 m - 320 m (459.318 feet to 1049.87 feet)(Absolute Magnitude: H= 21.375)
  • Orbit Type: Apollo [NEO]- Potentially Hazardous Asteroid
  • On the Sentry Risk Table: No Removed on 2016-12-02 21:33
  • 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 )observation by: Mt. Lemmon Survey (MPC Code G96) The Discovery M.P.E.C.: MPEC 2016-W38 : 2016 WJ1
  • Last Observation(publish): 2016 12 06.14946 (by iTelescope Observatory (MPC Code H06)
  • Data-Arc Span(publish) : 4904 days (13.43 yr)
  • Number of Optical Observations(published): 305
  • Observatories Reporting (Published) Observations(MPC Code):
    • (046) Klet Observatory, Ceske Budejovice, Czech Republic.
    • (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.   Observers
    • (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 N EO Follow-Up (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: 0.6654428334671134 (AU)
  • Aphelion Distance: 2.013952383212332 (AU)
  • Earth MOID: 0.000339353 AU (0.132(LD)) or 31,544.832 miles (50,766.486 (KM))
  • Close-Approach to Earth: Will safely pass Earth on 2016-December-16 at a Nominal Distance of  0.0538126242900806 (AU) (20.942(LD)) or 5,002,195.932 miles (8,050,254.01(KM))
The NEO 2016 WJ1 on 2016-12-06 from Mayhill, New Mexico (New Mexico Skies) (MPC Code H06)
a stack of 4-30 Second Luminance BIN2 Images taken with iTelescope.net's
(T11 TEL 0.50-m f/6.8 reflector + CCD + f/4.5 focal reducer)
(c) Steven M.Tilley
The NEO 2016 WJ1 on 2016-12-06 from Mayhill, New Mexico (New Mexico Skies) (MPC Code H06)
a stack of 4-30 Second Luminance BIN2 Images taken with iTelescope.net's
(T11 TEL 0.50-m f/6.8 reflector + CCD + f/4.5 focal reducer)
(c) Steven M.Tilley
The NEO 2016 WJ1 on 2016-12-06 from Mayhill, New Mexico (New Mexico Skies) (MPC Code H06)
a stack of 4-30 Second Luminance BIN2 Images taken with iTelescope.net's
(T11 TEL 0.50-m f/6.8 reflector + CCD + f/4.5 focal reducer)
(c) Steven M.Tilley
The NEO 2016 WJ1 on 2016-12-06 from Mayhill, New Mexico (New Mexico Skies) (MPC Code H06)
a stack of 4-30 Second Luminance BIN2 Images taken with iTelescope.net's
(T11 TEL 0.50-m f/6.8 reflector + CCD + f/4.5 focal reducer)
(c) Steven M.Tilley
The NEO 2016 WJ1 on 2016-12-06 from Mayhill, New Mexico (New Mexico Skies) (MPC Code H06)
a stack of 4-30 Second Luminance BIN2 Images taken with iTelescope.net's
(T11 TEL 0.50-m f/6.8 reflector + CCD + f/4.5 focal reducer)
(c) Steven M.Tilley

The NEO 2016 WJ1 on 2016-12-06 from Mayhill, New Mexico (New Mexico Skies) (MPC Code H06)
a stack of 26-30 Second Luminance BIN2 Images taken with iTelescope.net's
(T11 TEL 0.50-m f/6.8 reflector + CCD + f/4.5 focal reducer)
(c) Steven M.Tilley

The NEO 2016 WJ1 on 2016-12-06 from Mayhill, New Mexico (New Mexico Skies) (MPC Code H06)
a stack of 10-30 Second Luminance BIN2 Images taken with iTelescope.net's
(T11 TEL 0.50-m f/6.8 reflector + CCD + f/4.5 focal reducer)
(c) Steven M.Tilley
 A screenshot of Find_Orb showing elements and their uncertainty
A screenshot of Find_Orb showing orbital elements and uncertainty 
with all published observation.(as of 2016-12-06 )
(2 observationobservation are rejected as outliers)  
Orbital elements:  2016 WJ1
   Perihelion 2017 Feb 7.484174 +/- 7.58e-5 TT = 11:37:12 (JD 2457791.984174)
Epoch 2017 Feb 16.0 TT = JDT 2457800.5   Earth MOID: 0.0004   Ve: 0.0024
M   5.41278301 +/- 0.000047         Ma: 0.0027                Find_Orb
n   0.63561452635 +/- 9.48e-8       Peri.   87.67640929 +/- 0.00013
a   1.33969778679 +/- 1.33e-7       Node    82.05225737 +/- 0.00009
e   0.5032876307 +/- 6.78e-7        Incl.    2.88944962 +/- 0.000015
P   1.55/566.37d           H 21.3   G  0.15   U  1.9  
q 0.66544446179 +/- 9.73e-7    Q 2.01395111179 +/- 7.16e-7
303 of 305 observations 2003 July 4-2016 Dec. 6; mean residual 0".31
Useful Links:

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
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