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only 6 days data-arc span there is "little" known about the NEO 2016 WJ1 and the information in this post may become outdated.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