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2 External links  














(308242) 2005 GO21






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This is an old revision of this page, as edited by Exoplanetaryscience (talk | contribs)at21:02, 16 March 2015 (External links). The present address (URL) is a permanent link to this revision, which may differ significantly from the current revision.
(diff)  Previous revision | Latest revision (diff) | Newer revision  (diff)

(308242) 2005 GO21
Goldstone radar image of asteroid 2005 GO21
taken 17 June 2012.
Discovery[1]
Discovered bySiding Spring Survey (E12)
0.5-m Uppsala Schmidt
Discovery date2005 April 1
Designations

Designation

(308242) 2005 GO21

Minor planet category

Aten NEO,
PHA[2]
Orbital characteristics[2]
Epoch 2012-Mar-14
(Uncertainty=0)[2]
Aphelion1.0095 AU (Q)
Perihelion0.49716 AU (q)

Semi-major axis

0.75333 AU (a)
Eccentricity0.34005

Orbital period (sidereal)

0.65 yr

Mean anomaly

69.001° (M)
Inclination24.915°

Longitude of ascending node

272.71°

Argument of perihelion

156.57°
Physical characteristics
Dimensions~1.6 km[3]

Sidereal rotation period

11 hr[3]

Absolute magnitude (H)

16.4[2]

(308242) 2005 GO21 is a large near-Earth asteroid and potentially hazardous object.[2] It has a well determined orbit with an observation arc of 7 years and an uncertainty parameter of 0.[2] It was discovered on 1 April 2005 by the Siding Spring Survey at an apparent magnitude of 18.1 using the 0.5-metre (20 in) Uppsala Southern Schmidt Telescope.[1]

Based on an absolute magnitude of 16.4,[2] the asteroid has an estimated diameter of 1.6 km (within a factor of two).[3] 2005 GO21 is the largest potentially hazardous asteroid (PHA) discovered in 2005.[4] On 21 June 2012 it passed Earth at a distance of 0.043963 AU (6,576,800 km; 4,086,600 mi).[5] The 2012 passage was studied with radar using Goldstone and Arecibo.[3]

References

  1. ^ a b "MPEC 2005-G31 : 2005 GO21". IAU Minor Planet Center. 2005-04-05. Retrieved 2012-06-18. (K05G21O)
  • ^ a b c d e f g "JPL Small-Body Database Browser: 308242 (2005 GO21)" (last observation: 2012-06-17; arc: 7.21 years). Jet Propulsion Laboratory. Retrieved 2012-06-18.
  • ^ a b c d Dr. Lance A. M. Benner (2012-06-18). "(308242) 2005 GO21 Goldstone Radar Observations Planning". NASA/JPL Asteroid Radar Research. Retrieved 2012-06-18.
  • ^ "JPL Small-Body Database Search Engine: PHAs and H < 17 (mag)". JPL Solar System Dynamics. Retrieved 2011-11-20.
  • ^ "JPL Close-Approach Data: 308242 (2005 GO21)" (last observation: 2012-06-17; arc: 7.21 years). Retrieved 2012-06-18.
  • External links


    Retrieved from "https://en.wikipedia.org/w/index.php?title=(308242)_2005_GO21&oldid=651686703"

    Categories: 
    Aten asteroids
    Near-Earth asteroids
    Radar-imaged asteroids
    Astronomical objects discovered in 2005
    Near-Earth objects in 2012
    Hidden category: 
    Pages using infobox planet with unknown parameters
     



    This page was last edited on 16 March 2015, at 21:02 (UTC).

    This version of the page has been revised. Besides normal editing, the reason for revision may have been that this version contains factual inaccuracies, vandalism, or material not compatible with the Creative Commons Attribution-ShareAlike License.



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