2015 AZ43
| Discovery[1] | |
|---|---|
| Discovered by | Pan-STARRS (F51) |
| Discovery date | 11 January 2015 |
| Designations | |
| MPC designation | 2015 AZ43 |
| Apollo NEO[2] | |
| Orbital characteristics[2] | |
|
Epoch 2014-Dec-09 (Uncertainty=4)[2] | |
| Observation arc | 45 days |
| Aphelion | 2.76955 AU (Q) |
| Perihelion | 0.98831921 AU (q) |
| 1.87894 AU (a) | |
| Eccentricity | 0.474001 |
| 2.58 yr | |
| 329.9174° (M) | |
| Inclination | 4.47852° |
| 337.59218° | |
| 181.52865° | |
| Physical characteristics | |
| Dimensions |
~70 meters[3] 50–120 meters[4] |
| 23.5[2] | |
|
| |
2015 AZ43 (also written 2015 AZ43) is a near-Earth asteroid roughly 70 meters in diameter. On 10 February 2015 with a 29.5-day observation arc, it showed a 1 in 5,880 chance of impacting Earth on 27 February 2107.[3] However, the NEODyS nominal best-fit orbit shows that 2015 AZ43 will be 2.8 AU (420,000,000 km; 260,000,000 mi) from Earth on 27 February 2107.[5] A (non-impacting) Earth close approach in 2056 makes future trajectories diverge.[6] It was removed from the JPL Sentry Risk Table on 23 February 2015 using JPL solution 26 with an observation arc of 40 days that included radar data.[7]
2015 AZ43 was discovered on 11 January 2015 by Pan-STARRS at an apparent magnitude of 20 using a 1.8-meter (71 in) Ritchey–Chrétien telescope.[1] On 15 February 2015 the asteroid passed 0.0197 AU (2,950,000 km; 1,830,000 mi) from Earth.[8] The Goldstone Deep Space Network detected the asteroid on 18–19 February 2015, but the signal was not strong enough for delay-Doppler imaging.[9]
With an absolute magnitude of 23.5,[2] the asteroid is about 50–120 meters in diameter.[4]
References
- ↑ 1.0 1.1 "MPEC 2015-B05 : 2015 AZ43". IAU Minor Planet Center. 2015-01-16. Retrieved 2015-02-07. (K15A43Z)
- ↑ 2.0 2.1 2.2 2.3 2.4 "JPL Small-Body Database Browser: (2015 AZ43)" (last observation: 2015-02-20; arc: 40 days). Jet Propulsion Laboratory. Retrieved 2015-02-24.
- ↑ 3.0 3.1 "Earth Impact Risk Summary: 2015 AZ43". WayBack Machine: NASA/JPL Near-Earth Object Program Office. 2015-02-10. Retrieved 2015-02-24.
- ↑ 4.0 4.1 "Absolute Magnitude (H)". NASA/JPL. Retrieved 2015-02-07.
- ↑ "2015AZ43 Ephemerides for 25 February 2107 through 2 March 2107". NEODyS (Near Earth Objects – Dynamic Site). Retrieved 2015-02-14.
- ↑ "2015AZ43 close approaches". NEODyS (Near Earth Objects – Dynamic Site). Retrieved 2015-02-08.
- ↑ "Date/Time Removed". NASA/JPL Near-Earth Object Program Office. Retrieved 2015-02-24.
- ↑ "JPL Close-Approach Data: (2015 AZ43)" (last observation: 2015-02-20; arc: 40 days). Retrieved 2015-02-24.
- ↑ Dr. Lance A. M. Benner. "Goldstone Asteroid Schedule". NASA/JPL Asteroid Radar Research. Retrieved 2015-02-20.
External links
- Orbital simulation from JPL (Java) / Ephemeris
- 2015 AZ43 Orbit – Minor Planet Center
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