(22149) 2000 WD49
Discovery [1] | |
---|---|
Discovered by | LINEAR |
Discovery site | Lincoln Lab's ETS |
Discovery date | 21 November 2000 |
Designations | |
MPC designation | (22149) 2000 WD49 |
2000 WD49 · 1994 NE6 2000 BG7 | |
Jupiter trojan [1][2] Greek [3] · background [4] | |
Orbital characteristics [2] | |
Epoch 23 March 2018 (JD 2458200.5) | |
Uncertainty parameter 0 | |
Observation arc | 21.95 yr (8,018 d) |
Aphelion | 5.3927 AU |
Perihelion | 4.9259 AU |
5.1593 AU | |
Eccentricity | 0.0452 |
11.72 yr (4,280 d) | |
137.57° | |
0° 5m 2.76s / day | |
Inclination | 21.482° |
292.37° | |
227.74° | |
Jupiter MOID | 0.145 AU |
TJupiter | 2.8600 |
Physical characteristics | |
Mean diameter |
±0.39 km 48.19[5] ±4.09 km 50.37[6] |
±0.03 h 7.84[7] | |
±0.014 0.063[5] ±0.013 0.076[6] | |
C (assumed)[8] V–I = ±0.072 1.090[8] | |
9.90[6] 10.2[1][2][5][8] | |
|
(22149) 2000 WD49, provisional designation 2000 WD49, is a Jupiter trojan from the Greek camp, approximately 50 kilometers (31 miles) in diameter. It was discovered on 21 November 2000, by astronomers with the Lincoln Near-Earth Asteroid Research at the Lincoln Lab's ETS near Socorro, New Mexico, in the United States.[1] The dark Jovian asteroid belongs to the largest Jupiter trojans and has a rotation period of 7.84 hours.[8] It has not been named since its numbering in February 2001.[9]
Orbit and classification
2000 WD49 is a dark Jovian asteroid in a 1:1 orbital resonance with Jupiter. It is located in the leading Greek camp at the Gas Giant's L4 Lagrangian point, 60° ahead of its orbit . It is also a non-family asteroid in the Jovian background population.[4] It orbits the Sun at a distance of 4.9–5.4 AU once every 11 years and 9 months (4,280 days; semi-major axis of 5.16 AU). Its orbit has an eccentricity of 0.05 and an inclination of 21° with respect to the ecliptic.[2] The body's observation arc begins with its first observation as 1994 NE6 at the La Silla Observatory in July 1994, more than 6 years prior to its official discovery observation at Socorro.[1]
Numbering and naming
This minor planet was numbered by the Minor Planet Center on 8 February 2001 (M.P.C. 42121).[9] As of 2018, it has not been named.[1]
Physical characteristics
2000 WD49 is an assumed, carbonaceous C-type asteroid.[8] Most Jupiter trojans are D-types, with the reminder being mostly C and P-type asteroids. It has a high V–I color index of 1.090.[8]
Rotation period
In July 2006, a first rotational lightcurve of 2000 WD49 was obtained from photometric observations by Italian amateur astronomer Silvano Casulli. Lightcurve analysis gave a rotation period of ±0.03 hours with a brightness amplitude of 0.20 7.84magnitude (U=2).[8][7]
Diameter and albedo
According to the surveys carried out by the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer and the Japanese Akari satellite, 2000 WD49 measures 48.19 and 50.37 kilometers in diameter and its surface has an albedo of 0.063 and 0.076, respectively.[5][6] The Collaborative Asteroid Lightcurve Link assumes a standard albedo for a carbonaceous asteroid of 0.057 and calculates a diameter of 50.77 kilometers based on an absolute magnitude of 10.2.[8]
|
|
References
- 1 2 3 4 5 6 "22149 (2000 WD49)". Minor Planet Center. Retrieved 24 June 2018.
- 1 2 3 4 "JPL Small-Body Database Browser: 22149 (2000 WD49)" (2016-06-23 last obs.). Jet Propulsion Laboratory. Retrieved 24 June 2018.
- ↑ "List of Jupiter Trojans". Minor Planet Center. 1 June 2018. Retrieved 24 June 2018.
- 1 2 "Asteroid (22149) 2000 WD49 – Proper Elements". AstDyS-2, Asteroids – Dynamic Site. Retrieved 24 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". The Astrophysical Journal. 759 (1): 10. arXiv:1209.1549. Bibcode:2012ApJ...759...49G. doi:10.1088/0004-637X/759/1/49. Retrieved 24 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 24 June 2018. (online, AcuA catalog p. 153)
- 1 2 Behrend, Raoul. "Asteroids and comets rotation curves – (22149)". Geneva Observatory. Retrieved 24 June 2018.
- 1 2 3 4 5 6 7 8 "LCDB Data for (22149)". Asteroid Lightcurve Database (LCDB). Retrieved 24 June 2018.
- 1 2 "MPC/MPO/MPS Archive". Minor Planet Center. Retrieved 24 June 2018.
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 (20001)-(25000) – Minor Planet Center
- Asteroid (22149) 2000 WD49 at the Small Bodies Data Ferret
- (22149) 2000 WD49 at AstDyS-2, Asteroids—Dynamic Site
- (22149) 2000 WD49 at the JPL Small-Body Database