2012 YQ1

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2012 YQ1
Asteroids-PHA-and-NEA-Orbits.jpg
Discovery[1] and designation
Discovered by Andrey Oreshko and Timur Kryachko
Discovery site "Elena" Telescope (Chilean Atacama desert)
Discovery date 2012 Dec 19
Minor planet category Apollo NEO,
PHA
Orbital characteristics[2]
Epoch 2013-Apr-18
(Uncertainty=7)
Aphelion 3.11509±0.00377 AU[2]
Perihelion 0.87012±0.00004 AU[2]
Semi-major axis 1.99261±0.00241 AU[2]
Eccentricity 0.56332±0.0006[2]
Orbital period 2.811 years (1,027 d)[2]
Mean anomaly 22.87031±0.03773 deg[2]
Inclination 5.14883±0.00319 deg[2]
Longitude of ascending node 120.16657±0.00583 deg[2]
Argument of perihelion 42.08109±0.00571 deg[2]
Physical characteristics
Dimensions ~220 m (720 ft)[3]
Absolute magnitude (H) 21.028±0.431[2]; 20.9[4]

2012 YQ1 is an Apollo asteroid discovered on 19 December 2012 by astronomers Andrey Oreshko and Timur Kryachko using an "Elena" Telescope located in the Chilean Atacama desert.[1] With a 4 day observation arc, the asteroid had a 1 in 3 million chance of impacting in 2106.[3] With a 10 day observation arc, the asteroid had a 1 in 10 million chance of impacting in 2106.[4] On 5 January 2013, the asteroid passed 0.10 AU (15,000,000 km; 9,300,000 mi) from Earth.[2] It was removed from the Sentry Risk Table on 8 January 2013.[5] It has an observation arc of 32 days and an orbital uncertainty of 7.[2] Since the asteroid has a poorly known orbit, the cone of uncertainty quickly multiplies as a result of perturbations by the inner planets and prevents precise/reliable ephemeris data. Eliminating an entry on the Sentry Risk Table is a negative prediction; a prediction of where it will NOT be.

Orbit (blue) of asteroid 2012 YQ1 for 6 February 2013


References[edit]

  1. ^ a b "MPEC 2012-Y15 : 2012 YQ1". IAU Minor Planet Center. 2012-12-21. Retrieved 2013-02-05.  (K12Y01Q)
  2. ^ a b c d e f g h i j k l m "JPL Close-Approach Data: (2012 YQ1)". 2013-01-20 last obs (arc=32 days). Retrieved 2013-02-05. 
  3. ^ a b "Observations of small Solar-System bodies". hohmanntransfer. 2012-12-24. Retrieved 2013-02-06.  (3.3e-07 = 1 in 3,030,000 chance)
  4. ^ a b "Observations of small Solar-System bodies". hohmanntransfer. 2012-12-30. Retrieved 2013-02-05. 
  5. ^ "Date/Time Removed". NASA/JPL Near-Earth Object Program Office. Retrieved 2012-03-19. 

External links[edit]