| Discovery | |
|---|---|
| Discovered by | Spacewatch |
| Discovery site | Kitt Peak National Obs. |
| Discovery date | 3 April 2002 |
| Designations | |
| (163249) 2002 GT | |
| NEO · PHA · Apollo[1] | |
| Orbital characteristics[1] | |
| Epoch 13 January 2016 (JD 2457400.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 5114 days (14.00 yr) |
| Aphelion | 1.7945 AU (268.45 Gm) |
| Perihelion | 0.89422 AU (133.773 Gm) |
| 1.3444 AU (201.12 Gm) | |
| Eccentricity | 0.33483 |
| 1.56 yr (569.33 d) | |
| 196.65° | |
| 0° 37m 56.352s / day (n) | |
| Inclination | 6.9681° |
| 201.76° | |
| 135.09° | |
| Earth MOID | 0.0161099 AU (2.41001 Gm) |
| Physical characteristics | |
Mean diameter | 350-500 m[2] |
| 3.7663 h (0.15693 d) | |
| 18.4[1] | |
(163249) 2002 GT is an Apollo asteroid with an absolute magnitude of 18.26.[1] It is a potentially hazardous asteroid as its orbit crosses that of Earth.[3]
Description
In 2011, NASA considered sending the unmanned spacecraft Deep Impact toward the asteroid with the aim of performing a flyby[3] in 2020. It was uncertain whether Deep Impact carried sufficient fuel for this operation.[3]
On 24 November 2011 and 4 October 2012, the space probe's thrusters were fired briefly for two trajectory correction maneuvers that targeted Deep Impact for an encounter with 2002 GT in 2020, possibly within a distance of no more than 400 kilometers. However, funding for the flyby mission was not guaranteed.[4] In June 2013 the asteroid was observed in radar by the Arecibo Observatory.[5]
However, on 8 August 2013 NASA lost communication with the spacecraft, and on 20 September 2013, NASA abandoned further attempts to contact the craft.[6] According to A'Hearn,[7] the most probable reason of software malfunction was a Y2K-like problem (at 11 August 2013 0:38:49 it was 232 deciseconds from 1 January 2000[8]).
See also
References
- ^ a b c d "JPL Small-Body Database Browser: 163249 (2002 GT)". 4 March 2009. Retrieved 7 April 2016.
- ^ 45th Meeting of the American Astronomical Society's Division for Planetary Sciences, October 2013, page 6
- ^ a b c Stephen Clark, "Deep Impact sets path for asteroid encounter in 2020". Spaceflight Now. 18 December 2011.
- ^ Emily Lakdawalla blog entry: "Deep Impact targets possible 2020 asteroid flyby". 5 October 2012.
- ^ Asteroid and Comet Mission Targets Observed by Radar (archived version, 19 Dec 2013)
- ^ NASA calls off search for lost Deep Impact comet probe - Australian Broadcasting Corporation - Retrieved 21 September 2013.
- ^ "NASA Declares End to Deep Impact Comet Mission Communication cutoff leads to loss of comet hunter, say space officials". National Geographic. 20 September 2013. Archived from the original on 23 September 2013.
- ^ "Re: [tz] Deep Impact: wrong time zone?". [email protected]. 23 September 2013. Archived from the original on 2 October 2013. Retrieved 23 September 2020.
External links
- Arecibo data
- (163249) 2002 GT at NeoDyS-2, Near Earth Objects—Dynamic Site
- (163249) 2002 GT at ESA–space situational awareness
- (163249) 2002 GT at the JPL Small-Body Database
This page was last edited on 27 November 2023, at 19:12