(22149) 2000 WD49

From Wikipedia, the free encyclopedia
(22149) 2000 WD49
Discovery[1]
Discovered byLINEAR
Discovery siteLincoln Lab's ETS
Discovery date21 November 2000
Designations
(22149) 2000 WD49
2000 WD49 · 1994 NE6
2000 BG7
Minor planet category
Jupiter trojan[1][2]
Greek[3] · background[4]
Orbital characteristics[2]
Epoch 23 March 2018 (JD 2458200.5)
Uncertainty parameter 0
Observation arc21.95 yr (8,018 d)
Aphelion5.3927 AU
Perihelion4.9259 AU
5.1593 AU
Eccentricity0.0452
11.72 yr (4,280 d)
137.57°
0° 5m 2.76s / day
Inclination21.482°
292.37°
227.74°
Jupiter MOID0.145 AU
TJupiter2.8600
Physical characteristics
Mean diameter
48.19±0.39 km[5]
50.37±4.09 km[6]
7.84±0.03 h[7]
0.063±0.014[5]
0.076±0.013[6]
C (assumed)[8]
V–I = 1.090±0.072[8]
Absolute magnitude (H)
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 (see Trojans in astronomy). 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 7.84±0.03 hours with a brightness amplitude of 0.20 magnitude (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]

100+ largest Jupiter trojans

References[]

  1. ^ Jump up to: a b c d e f "22149 (2000 WD49)". Minor Planet Center. Retrieved 24 June 2018.
  2. ^ Jump up to: a b c d "JPL Small-Body Database Browser: 22149 (2000 WD49)" (2016-06-23 last obs.). Jet Propulsion Laboratory. Retrieved 24 June 2018.
  3. ^ "List of Jupiter Trojans". Minor Planet Center. 1 June 2018. Retrieved 24 June 2018.
  4. ^ Jump up to: a b "Asteroid (22149) 2000 WD49 – Proper Elements". AstDyS-2, Asteroids – Dynamic Site. Retrieved 24 June 2018.
  5. ^ Jump up to: a b c d 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. S2CID 119101711. Retrieved 24 June 2018. (online catalog)
  6. ^ Jump up to: a b c d 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. (online, AcuA catalog p. 153)
  7. ^ Jump up to: a b Behrend, Raoul. "Asteroids and comets rotation curves – (22149)". Geneva Observatory. Retrieved 24 June 2018.
  8. ^ Jump up to: a b c d e f g h "LCDB Data for (22149)". Asteroid Lightcurve Database (LCDB). Retrieved 24 June 2018.
  9. ^ Jump up to: a b "MPC/MPO/MPS Archive". Minor Planet Center. Retrieved 24 June 2018.

External links[]

Retrieved from ""