(86039) 1999 NC43
Discovery [1] | |
---|---|
Discovered by | LINEAR |
Discovery site | Lincoln Lab's ETS |
Discovery date | 14 July 1999 |
Designations | |
MPC designation | (86039) 1999 NC43 |
1999 NC43 | |
Apollo · NEO · PHA [1] | |
Orbital characteristics [1] | |
Epoch 31 July 2016 (JD 2457600.5) | |
Uncertainty parameter 0 | |
Observation arc | 15.04 yr (5,492 days) |
Aphelion | 2.7784 AU |
Perihelion | 0.7409 AU |
1.7596 AU | |
Eccentricity | 0.5790 |
2.33 yr (853 days) | |
30.803° | |
Inclination | 7.1230° |
311.81° | |
120.57° | |
Earth MOID | 0.0247 AU |
Physical characteristics | |
Dimensions | 2.22 km[2][3] 1.43±0.07 km[4] |
34.49±0.18 h[lower-alpha 1] 34.29±0.06 h[5][6] |
|
0.14[3] 0.13[2] 0.352±0.039[4] |
|
SMASS = Q [1][7] | |
16.0[1][4] 16.08[8] 16.1[2][7] |
|
(86039) 1999 NC43, is an eccentric, rare-type asteroid, suspected tumbler and relatively slow rotator from the group of Apollo asteroids. It is classified as near-Earth object and potentially hazardous asteroid, and measures approximately 2.2 kilometers in diameter. The asteroid was discovered on 14 July 1999, by the U.S. Lincoln Near-Earth Asteroid Research (LINEAR) team at Lincoln Laboratory's Experimental Test Site, Socorro, New Mexico, at an apparent magnitude of 18, using a 1.0-meter reflector.[9][10]
The rare Q-type asteroid is one of only 20 characterized bodies of this spectral type in the SMASS taxonomic scheme.[11] It has a well-determined orbit with an uncertainty of 0. The body orbits the Sun at a distance of 0.7–2.8 AU once every 2 years and 4 months (853 days). Its orbit has a high eccentricity of 0.58 and an inclination of 7° with respect to the ecliptic.[1] The first observation was made by the Catalina Sky Survey in June 1999, extending the asteroid's observation arc by one month prior to its discovery.[9] Its Earth minimum orbit intersection distance is Lua error in Module:Convert at line 1851: attempt to index local 'en_value' (a nil value).. Its most notable close approach to Earth will be on 14 February 2173 at a distance of 0.03361 AU (5,028,000 km).[12] The asteroid also makes close approaches to Venus and Mars.
Several rotational light-curves were obtained from photometric observations by Czech astronomer Petr Pravec at Ondřejov Observatory and American astronomer Brian Warner at his private Palmer Divide Observatory, Colorado. The light-curve with the best result gave a rotation period of 34.49±0.18 hours with an exceptionally high brightness variation of 1.1 in magnitude (U=n.a.).[lower-alpha 1] Pravec's alternative period of 122 hours was later not supported by Warner.[5] However, there are still other periods possible due to sparse photometric data points. The asteroid is also suspected to be in a tumbling motion, which makes the determination of its period more complex.[6] For an asteroid of its size, it is a relatively slow rotator.
According to the survey carried out by the Japanese Akari satellite, the asteroid has a high albedo of 0.35 and a diameter of 1.43 kilometers.[4] Observations by the Keck Observatory in the thermal infrared gave a refined albedo of 0.13–0.14 with a larger diameter of 2.22 kilometers.[2][3][7]
1999 NC43 is suspected to be related to the 20-meter Chelyabinsk meteor, which exploded as a bright fireball over Russia on 15 February 2013. Analysis showed similar orbits for both bodies and suggested that they were once part of the same object.[13][14]
References
- ↑ 1.0 1.1 Pravec (2000) web: rotation period 34.49±0.18 hours with a brightness amplitude of 1.1 mag. Summary figures at Collaborative Asteroid Lightcurve Link (CALL) for (86039)
- ↑ 1.0 1.1 1.2 1.3 1.4 1.5 Lua error in package.lua at line 80: module 'strict' not found.
- ↑ 2.0 2.1 2.2 2.3 Lua error in package.lua at line 80: module 'strict' not found.
- ↑ 3.0 3.1 3.2 Lua error in package.lua at line 80: module 'strict' not found.
- ↑ 4.0 4.1 4.2 4.3 Lua error in package.lua at line 80: module 'strict' not found.
- ↑ 5.0 5.1 Lua error in package.lua at line 80: module 'strict' not found.
- ↑ 6.0 6.1 Lua error in package.lua at line 80: module 'strict' not found.
- ↑ 7.0 7.1 7.2 Lua error in package.lua at line 80: module 'strict' not found.
- ↑ Lua error in package.lua at line 80: module 'strict' not found.
- ↑ 9.0 9.1 Lua error in package.lua at line 80: module 'strict' not found.
- ↑ Lua error in package.lua at line 80: module 'strict' not found. (J99N43C)
- ↑ Lua error in package.lua at line 80: module 'strict' not found.
- ↑ Lua error in package.lua at line 80: module 'strict' not found.
- ↑ Lua error in package.lua at line 80: module 'strict' not found.
- ↑ Lua error in package.lua at line 80: module 'strict' not found.
External links
- Asteroid Lightcurve Database (LCDB), query form (info)
- Asteroids and comets rotation curves, CdR – Observatoire de Genève, Raoul Behrend
- Discovery Circumstances: Numbered Minor Planets (85001)-(90000) – Minor Planet Center
- (86039) 1999 NC43 at the JPL Small-Body Database