(308242) 2005 GO 21 is a large asteroid of the atomic group, a near-Earth object, and a potentially dangerous asteroid . [1] It has a well-defined orbit, the observation arc is 7 years, the uncertainty parameter is 0. [1] Opened on April 1, 2005 in the Siding Spring survey with an apparent magnitude of 18.1 when observed with the 0.5-meter Uppsala telescope. [2]
| (308,242) 2005 GO 21 | |
|---|---|
| Asteroid | |
 Image of an asteroid using the Goldstone radar, received June 17, 2012 | |
| Minor Planet Category | Aton · NEO · PHA [1] |
| Discovery [2] | |
| Discoverer | Siding Spring Review |
| Opening place | Siding Spring Observatory |
| opening date | April 1, 2005 |
| Orbital characteristics [1] | |
| Age : January 13, 2016 ( JD 2457400.5) | |
| Perihelion | 0.49720 a. e. (74 million km ) |
| Aphelion | 1.0093 a. e. (150 million km ) |
| Semimajor axis ( a ) | 0.75324 a. e. (110 million km ) |
| Orbital eccentricity ( e ) | 0.33992 |
| Sidereal circulation period | 0.65 years (238.8 days) |
| The average anomaly ( M o ) | 19.462 ° |
| Inclination ( i ) | 24.926 ° |
| Longitude node ( Ω ) | 272.70 ° |
| Pericenter Argument ( ω ) | 156.62 ° |
| physical characteristics | |
| Dimensions | ~ 1.6 km [3] |
| Rotation period ( T ) | 11.00 h [1] [3] |
| Absolute magnitude | 16.5 [1] |
With an absolute magnitude of 16.4 [1], the estimate of the diameter of the asteroid is 1.6 km (accurate to a factor of 2). [3] (308,242) 2005 GO 21 is one of the largest potentially dangerous asteroids, the largest among discovered in 2005. [4] On June 21, 2012, an asteroid passed the Earth at a distance of 0.043963 AU [5] During the approach, the asteroid was investigated using the radars of the Goldstone and Arecibo complexes. [3]
Notes
- ↑ 1 2 3 4 5 6 7 JPL Small-Body Database Browser: 308242 (2005 GO21) unspecified . Jet Propulsion Laboratory . Date of treatment April 7, 2016.
- ↑ 1 2 MPEC 2005-G31: 2005 GO21 . IAU Minor Planet Center (April 5, 2005). Date of treatment June 18, 2012. (K05G21O)
- ↑ 1 2 3 4 Dr. Lance AM Benner. (308242) 2005 GO21 Goldstone Radar Observations Planning . NASA / JPL Asteroid Radar Research (June 18, 2012). Date of treatment June 18, 2012.
- ↑ JPL Small-Body Database Search Engine: PHAs and H <17 (mag) . JPL Solar System Dynamics. Date of treatment November 20, 2011.
- ↑ JPL Close-Approach Data: 308242 (2005 GO21) unspecified . Date of treatment June 18, 2012.