(23135) 2000 AN146
Discovery [1] | |
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Discovered by | LINEAR |
Discovery site | Lincoln Lab's ETS |
Discovery date | 7 January 2000 |
Designations | |
MPC designation | (23135) 2000 AN146 |
2000 AN146 · 1967 GN1 1998 XF55 | |
Jupiter trojan [1][2][3] Greek [4][5] · background [5] | |
Orbital characteristics [2] | |
Epoch 23 March 2018 (JD 2458200.5) | |
Uncertainty parameter 0 | |
Observation arc | 50.47 yr (18,433 d) |
Aphelion | 5.5252 AU |
Perihelion | 4.9847 AU |
5.2550 AU | |
Eccentricity | 0.0514 |
12.05 yr (4,400 d) | |
155.59° | |
0° 4m 54.48s / day | |
Inclination | 17.358° |
256.58° | |
255.74° | |
Jupiter MOID | 0.011 AU |
TJupiter | 2.9060 |
Physical characteristics | |
Dimensions | km × 42.0 km 42.0(occ.)[6] |
Mean diameter |
±0.74 km 66.23[7] ±1.93 km 68.50[8] |
±0.01 h 8.69[9] | |
±0.003 0.042[8] ±0.011 0.044[7] | |
C (assumed)[3] V–I = ±0.050 0.860[3] BR = ±0.078 1.310[3] | |
9.90[1][2][3][7][8] | |
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(23135) 2000 AN146, provisional designation 2000 AN146, is a large Jupiter trojan from the Greek camp, approximately 66 kilometers (41 miles) in diameter. It was discovered on 7 January 2000, by astronomers with the Lincoln Near-Earth Asteroid Research at the Lincoln Laboratory's Experimental Test Site near Socorro, New Mexico, in the United States.[1] The dark Jovian asteroid belongs to the 50 largest Jupiter trojans and has a rotation period of 8.7 hours.[3] It has not been named since its numbering in March 2001.[10]
Orbit and classification
As all Jupiter trojans, 2000 AN146 is in a 1:1 resonance with Jupiter. It is located in the leading Greek camp at Jupiter's L4 Lagrangian point, 60° ahead of the Gas Giant's orbit (see Trojans in astronomy). It is a non-family asteroid in the Jovian background population.[5][6]
This asteroid orbits the Sun at a distance of 5.0–5.5 AU once every 12 years and 1 month (4,400 days; semi-major axis of 5.26 AU). Its orbit has an eccentricity of 0.05 and an inclination of 17° with respect to the ecliptic.[2] The body's observation arc begins with its first observation as 1967 GN1 at El Leoncito in April 1967, nearly 33 years prior to its official discovery observation at Socorro.[1]
Numbering and naming
This minor planet was numbered by the Minor Planet Center on 9 March 2001 (M.P.C. 42327).[10] As of 2018, it has not been named.[1]
Physical characteristics
2000 AN146 is an assumed C-type asteroid,[3] a typical spectral type besides the D- and P-types among the population of Jovian asteroids.
Rotation period
In November 2011, a rotational lightcurve of 2000 AN146 was obtained from photometric observations by Robert Stephens at the Goat Mountain Astronomical Research Station (G79) in collaboration with Linda French at Illinois Wesleyan University and Daniel Coley at the Trojan Station of Center for Solar System Studies (U81), as well as Ralph Megna and Lawrence Wasserman. Lightcurve analysis gave a rotation period of 8.69 hours with a brightness amplitude of 0.27 magnitude (U=3-).[9] The result supersedes a previous observation from a fragmentary lightcurve that gave a period of only 6.86 hours (U=1).[3][11]
Diameter and albedo
According to the surveys carried out by the Japanese Akari satellite and the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer, 2000 AN146 measures 66.23 and 68.50 kilometers in diameter and its surface has an albedo of 0.044 and 0.042, respectively.[7][8]
The Collaborative Asteroid Lightcurve Link assumes a standard albedo for a carbonaceous asteroid of 0.057 and consequently calculates a shorter diameter (due to the higher albedo) of 58.29 kilometers using an absolute magnitude of 9.9.[3] In September 2005, an observed asteroid occultation gave an inconclusive cross-section of km × 42.0 km (no fit, but observations sufficiently reliable to derive an 42.0astrometric position of the asteroid relative to the star).[6]
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References
- 1 2 3 4 5 6 "23135 (2000 AN146)". Minor Planet Center. Retrieved 5 June 2018.
- 1 2 3 4 "JPL Small-Body Database Browser: 23135 (2000 AN146)" (2017-09-28 last obs.). Jet Propulsion Laboratory. Retrieved 5 June 2018.
- 1 2 3 4 5 6 7 8 9 "LCDB Data for (23135)". Asteroid Lightcurve Database (LCDB). Retrieved 5 June 2018.
- ↑ "List of Jupiter Trojans". Minor Planet Center. 30 May 2018. Retrieved 5 June 2018.
- 1 2 3 "Asteroid (23135) 2000 AN146". AstDyS-2, Asteroids – Dynamic Site. Retrieved 5 June 2018.
- 1 2 3 "Asteroid (23135) 2000 AN146". Small Bodies Data Ferret. Retrieved 5 June 2018.
- 1 2 3 4 Grav, T.; Mainzer, A. K.; Bauer, J. M.; Masiero, J. R.; Nugent, C. R. (November 2012). "WISE/NEOWISE Observations of the Jovian Trojan Population: Taxonomy" (PDF). The Astrophysical Journal. 759 (1): 10. arXiv:1209.1549. Bibcode:2012ApJ...759...49G. doi:10.1088/0004-637X/759/1/49. Retrieved 9 June 2018. (online catalog)
- 1 2 3 4 Usui, Fumihiko; Kuroda, Daisuke; Müller, Thomas G.; Hasegawa, Sunao; Ishiguro, Masateru; Ootsubo, Takafumi; et al. (October 2011). "Asteroid Catalog Using Akari: AKARI/IRC Mid-Infrared Asteroid Survey". Publications of the Astronomical Society of Japan. 63 (5): 1117–1138. Bibcode:2011PASJ...63.1117U. doi:10.1093/pasj/63.5.1117. Retrieved 15 June 2018. (online, AcuA catalog p. 153)
- 1 2 French, Linda M.; Stephens, Robert D.; Coley, Daniel R.; Megna, Ralph; Wasserman, Lawrence H. (July 2012). "Photometry of 17 Jovian Trojan Asteroids". The Minor Planet Bulletin. 39 (3): 183–187. Bibcode:2012MPBu...39..183F. ISSN 1052-8091. Retrieved 5 June 2018.
- 1 2 "MPC/MPO/MPS Archive". Minor Planet Center. Retrieved 5 June 2018.
- ↑ Duffard, R. D.; Melita, M.; Ortiz, J. L.; Licandro, J.; Williams, I. P.; Jones, D. (December 2007). "Light-Curve Survey of the Trojan Asteroids" (PDF). Asteroids. Bibcode:2008LPICo1405.8187D. Retrieved 5 July 2018.
External links
- Asteroid Lightcurve Database (LCDB), query form (info)
- Discovery Circumstances: Numbered Minor Planets (20001)-(25000) – Minor Planet Center
- (23135) 2000 AN146 at AstDyS-2, Asteroids—Dynamic Site
- (23135) 2000 AN146 at the JPL Small-Body Database