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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only 6 days data-arc span there is "little" known about the NEO 2016 WJ1 and the information in this post may become outdated.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 24, 2016

The NEO 2016 WJ1 on 2016-11-24

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

Background
(as of 2016-11-23)
 
  • Object: 2016 WJ1 
  • Approximate Diameter: 150 m - 330 m (492.126 feet to 1082.68 feet)(Absolute Magnitude: H= 21.303)
  • Orbit Type: Apollo [NEO]- Potentially Hazardous Asteroid
  • On the Sentry Risk Table: yes NO  NOTE this is NOT a prediction of an impact but rather a statement there is insufficient observational data rule out an impact -- for information read  Understanding Risk Pages by Jon Giorgini
  • On the NEODyS CLOMON2 risk page: yes
  • 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 23.32687 (byTenagra II Observatory, Nogales (MPC Code 926)
  • Data-Arc Span(publish) : 4 days
  • Number of Optical Observations(published): 56
  • Perihelion Distance: 0.6659416098880451  (AU)
  • Aphelion Distance: 2.008089275410093 (AU)
  • Earth MOID: 0.000375787 AU (0.146 (LD)) or 34,931.584 miles (56,216.935 (KM))
  • Close-Approach to Earth: Will safely pass Earth on 2016-December-16 at a Nominal Distance of  0.053816832705857 (AU) ( 20.944 (LD)) or 5,002,587.129 miles (8,050,883.58 (KM))
The NEO 2016 WJ1 on 2016-11-24 from Mayhill, New Mexico (New Mexico Skies) (MPC Code H06)
a stack of 10- 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)
(c) Steven M.Tilley
The NEO 2016 WJ1 on 2016-11-24 from Mayhill, New Mexico (New Mexico Skies) (MPC Code H06)
a stack of 10- 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)
(c) Steven M.Tilley
The NEO 2016 WJ1 on 2016-11-24 from Mayhill, New Mexico (New Mexico Skies) (MPC Code H06)
a stack of 10- 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)
(c) Steven M.Tilley
Useful Links:

Nov 23, 2016

The NEO 2016 WG on 2016-11-23


Background
(as of 2016-11-23)
 
  • Object: 2016 WG
  • Approximate Diameter: 59 m - 130 m (193.57 feet to 426.509 feet)(Absolute Magnitude: H= 23.258)
  • Orbit Type: Apollo [NEO]
  • On the Sentry Risk Table: yes   NOTE this is NOT a prediction of an impact but rather a statement there is insufficient observational data rule out an impact -- for information read  Understanding Risk Pages by Jon Giorgini
  • On the NEODyS CLOMON2 risk page: yes
  • First observation was made: 2016 11 18.43559
  • First observed by: Mt. Lemmon Survey (MPC Code G96) The Discovery M.P.E.C.: MPEC 2016-W21 : 2016 WG
  • Last Observation(publish): 2016 11 23.33429 (by LPL/Spacewatch II (MPC Code 291)
  • Data-Arc Span(publish) : 5 days
  • Number of Optical Observations(published): 101
  • Perihelion Distance: 0.4718660174472272(AU)
  • Aphelion Distance: 3.176881868525502 (AU)
  • Earth MOID:  0.00171104 AU ( 0.666 (LD)) or 159,051.104 miles (255,967.941 (KM))
  • Close-Approach to Earth: Will safely pass Earth on 2016-November-25 at a Nominal Distance of 0.0107875037239381 (AU) (4.198 (LD)) or 1,002,761.117 miles (1,613,787.587 (KM))
The NEO 2016 WG on 2016-11-23 from Mayhill, New Mexico (New Mexico Skies) (MPC Code H06)
a stack of 4- 15 Second Luminance BIN2 Images taken with iTelescope.net's
(T21 TEL 0.43-m f/6.8 reflector + CCD + f/4.5 focal reducer)
(c) Steven M.Tilley
The NEO 2016 WG on 2016-11-23 from Mayhill, New Mexico (New Mexico Skies) (MPC Code H06)
a stack of 4- 15 Second Luminance BIN2 Images taken with iTelescope.net's
(T21 TEL 0.43-m f/6.8 reflector + CCD + f/4.5 focal reducer)
(c) Steven M.Tilley
The NEO 2016 WG on 2016-11-23 from Mayhill, New Mexico (New Mexico Skies) (MPC Code H06)
a stack of 4- 15 Second Luminance BIN2 Images taken with iTelescope.net's
(T21 TEL 0.43-m f/6.8 reflector + CCD + f/4.5 focal reducer)
(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)




Nov 8, 2016

Information on the Asteroid (35396) 1997 XF11

The Near Earth Object (35396) 1997 XF11 is notable( or notorious) for the fact it became the center of a media firestorm on 11 March 1998 when an IAU Circular and press information sheet incorrectly stated the possibility of it impacting the Earth in 2028. Within a day new calculations where done showing the probability of Earth impact to be essentially zero. However this was after the news media reported the story and old(or incorrect) news stories have away living for long time(this can be a good thing if research is done right). This is why one should aways look for updates when doing any research. Recently this story has made a comeback in blogosphere. To show that (35396) 1997 XF11 is NOT "Being Hidden From the World" I obtain the publicly available orbit and imaged it from AstroCamp Observatory. Nerpio, Spain (MPC Code I89)...and I fond where it should be. Here is the images, background information, and links on (35396) 1997 XF11.


The Near Earth Objects (35396) 1997 XF11 on 2016-11-01 from AstroCamp Observatory. Nerpio, Spain - (MPC Code I89) using itelescope.net's (T7 TEL 0.43-m f/6.8 reflector + CCD) a stack of 4 - 60 Second Luminance BIN2 Images
(C) Steven M. Tilley
The Near Earth Objects (35396) 1997 XF11 on 2016-11-01 from AstroCamp Observatory. Nerpio, Spain - (MPC Code I89)
using itelescope.net's (T7 TEL 0.43-m f/6.8 reflector + CCD) a stack of 4 - 60 Second Luminance BIN2 Images
(C) Steven M. Tilley




Background 

(as of 2016-11-07)

Nov 7, 2016

Confirmation Images of the Asteroid 2016 VC1

 Background
(as of 2016-11-06)
     
    A confirmation image of the Near Earth Object 2016 VC1
    on 2016-11-04 from Auberry California USA - (MPC Code U69)
    a stack of 5 - 60 Second Luminance BIN2 Images using
    itelescope.net's (t24 TEL 0.61-m f/6.5 reflector + CCD)
    (C) Steven M. Tilley
    A confirmation image of the Near Earth Object 2016 VC1
    on 2016-11-04 from Auberry California USA - (MPC Code U69)
    a stack of 5 - 60 Second Luminance BIN2 Images using
    itelescope.net's (t24 TEL 0.61-m f/6.5 reflector + CCD)
    (C) Steven M. Tilley
    A confirmation image of the Near Earth Object 2016 VC1
    on 2016-11-04 from Auberry California USA - (MPC Code U69)
    a stack of 5 - 60 Second Luminance BIN2 Images using
    itelescope.net's (t24 TEL 0.61-m f/6.5 reflector + CCD)
    (C) Steven M. Tilley
    A confirmation image of the Near Earth Object 2016 VC1
    on 2016-11-04 from Auberry California USA - (MPC Code U69)
    a stack of 5 - 60 Second Luminance BIN2 Images using
    itelescope.net's (t24 TEL 0.61-m f/6.5 reflector + CCD)
    (C) Steven M. Tilley
    A confirmation image of the Near Earth Object 2016 VC1
    on 2016-11-05 from Auberry California USA - (MPC Code U69)
    a stack of 9 - 60 Second Luminance BIN2 Images using
    itelescope.net's (t24 TEL 0.61-m f/6.5 reflector + CCD)
    (C) Steven M. Tilley
    A confirmation image of the Near Earth Object 2016 VC1
    on 2016-11-05 from Auberry California USA - (MPC Code U69)
    a stack of 9 - 60 Second Luminance BIN2 Images using
    itelescope.net's (t24 TEL 0.61-m f/6.5 reflector + CCD)
    (C) Steven M. Tilley
    A confirmation image of the Near Earth Object 2016 VC1
    on 2016-11-05 from Auberry California USA - (MPC Code U69)
    a stack of 9 - 60 Second Luminance BIN2 Images using
    itelescope.net's (t24 TEL 0.61-m f/6.5 reflector + CCD)
    (C) Steven M. Tilley

    Other links: