(308242) 2005 GO21
|
| |
| Discovery[1] | |
|---|---|
| Discovered by |
Siding Spring Survey (E12) 0.5-m Uppsala Schmidt |
| Discovery date | 2005 April 1 |
| Designations | |
| MPC designation | (308242) 2005 GO21 |
|
Aten NEO, PHA[2] | |
| Orbital characteristics[2] | |
|
Epoch 2012-Mar-14 (Uncertainty=0)[2] | |
| Aphelion | 1.0095 AU (Q) |
| Perihelion | 0.49716 AU (q) |
| 0.75333 AU (a) | |
| Eccentricity | 0.34005 |
| 0.65 yr | |
| 69.001° (M) | |
| Inclination | 24.915° |
| 272.71° | |
| 156.57° | |
| Physical characteristics | |
| Dimensions | ~1.6 km[3] |
Sidereal rotation period | 11 hr[3] |
| 16.4[2] | |
|
| |
(308242) 2005 GO21 is a large Aten 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] (308242) 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 2 "MPEC 2005-G31 : 2005 GO21". IAU Minor Planet Center. 2005-04-05. Retrieved 2012-06-18. (K05G21O)
- 1 2 3 4 5 6 7 "JPL Small-Body Database Browser: 308242 (2005 GO21)" (last observation: 2012-06-17; arc: 7.21 years). Jet Propulsion Laboratory. Retrieved 2012-06-18.
- 1 2 3 4 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
- Orbital simulation from JPL (Java) / Ephemeris
- (308242) 2005 GO21 at the JPL Small-Body Database
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