(4035) 1986 WD
Discovery [1] | |
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Discovered by |
K. Suzuki T. Urata |
Discovery site | Toyota Obs. |
Discovery date | 22 November 1986 |
Designations | |
MPC designation | (4035) 1986 WD |
1986 WD · 1973 SR4 1973 UF6 | |
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 | 44.64 yr (16,306 d) |
Aphelion | 5.5799 AU |
Perihelion | 4.9899 AU |
5.2849 AU | |
Eccentricity | 0.0558 |
12.15 yr (4,438 d) | |
213.24° | |
0° 4m 51.96s / day | |
Inclination | 12.130° |
233.73° | |
197.56° | |
Jupiter MOID | 0.0243 AU |
TJupiter | 2.9520 |
Physical characteristics | |
Mean diameter |
±4.45 km 66.99[6] km 68.23(derived)[3] ±5.4 km 68.46[7] ±1.24 km 68.73[8] |
±0.08 h 13.467[9] ±0.156 h 13.475[10] ±0.20 h 13.49[11] ±0.08 h 13.52[9] | |
±0.008 0.054[8] 0.0548(derived)[3] ±0.013 0.0718[7] ±0.010 0.076[6] | |
C (assumed)[3] V–I = ±0.031 0.970[3] | |
9.30[6] 9.6[1][2][3][8] ±0.46 9.82[12] | |
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(4035) 1986 WD, provisional designation 1986 WD, is a large Jupiter trojan from the Greek camp, approximately 68 kilometers (42 miles) in diameter. It was discovered on 22 November 1986, by Japanese astronomers Kenzo Suzuki and Takeshi Urata at the Toyota Observatory (881) in Toyota, Japan.[1] The assumed C-type asteroid belongs to the 50 largest Jupiter trojans and has a rotation period of 13.5 hours.[3] Of more than half a million numbered minor planets, it is the second-lowest numbered body without a name.
Classification and orbit
1986 WD is a dark Jovian asteroid orbiting in the leading Greek camp at Jupiter's L4 Lagrangian point, 60° ahead of the Gas Giant's orbit in a 1:1 resonance (see Trojans in astronomy). It is also a non-family asteroid in the Jovian background population.[5][13]
It orbits the Sun at a distance of 5.0–5.6 AU once every 12 years and 2 months (4,438 days; semi-major axis of 5.28 AU). Its orbit has an eccentricity of 0.06 and an inclination of 12° with respect to the ecliptic.[2] The body's observation arc begins with its first observation as 1973 SR4 at Crimea–Nauchnij in September 1973, or 13 years prior to its official discovery observation at Toyota, Japan.[1]
Physical characteristics
1986 WD is an assumed, carbonaceous C-type asteroid, which is in line with the body's albedo (see below), while its V–I color index of 0.93 agrees with that of most Jovian D-type asteroids.[3]
Rotation period
In October 2009, a rotational lightcurve was obtained from photometric observations by astronomer Stefano Mottola at the Calar Alto Observatory in Spain. It gave a well-defined rotation period of ±0.08 hours with a brightness variation of 0.21 in 13.467magnitude (U=3), superseding a period of 13.52 hours and an amplitude of more than 0.20 previously measured with the ESO 1-metre telescope at La Silla Observatory in May 1991 (U=3).[9]
In August 2015, photometric observations of 1986 WD by the Kepler space observatory during its K2 mission gave a concurring period of 13.475 and 13.49 hours with a brightness amplitude of 0.18 and 0.17 magnitude observations (U=2+/2+).[3][10][11]
Diameter and albedo
According to the surveys carried out by the Infrared Astronomical Satellite IRAS, the Japanese Akari satellite, and the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer, the asteroid measures between 66.99 and 68.73 kilometers in diameter and its surface has an albedo between 0.054 and 0.076.[7][6][8] The Collaborative Asteroid Lightcurve Link derives an albedo of 0.0548 and a diameter of 68.23 kilometers based on an absolute magnitude of 9.6.[3]
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Numbering and naming
This minor planet was numbered by the Minor Planet Center on 22 March 1989 (M.P.C. 14337).[14] Since then, most low-numbered minor planets have received a name. Up to number 5000, only a few asteroids remain unnamed – all of them are Jupiter trojans or near-Earth asteroids – of which 1986 WD is the one with the second lowest number:
- (3708) 1974 FV1
- (4035) 1986 WD
- (4489) 1988 AK
- (4596) 1981 QB
- (4688) 1980 WF
- (4715) 1989 TS1
- (4835) 1989 BQ
- (4953) 1990 MU
References
- 1 2 3 4 5 "4035 (1986 WD)". Minor Planet Center. Retrieved 10 June 2018.
- 1 2 3 4 "JPL Small-Body Database Browser: 4035 (1986 WD)" (2018-05-20 last obs.). Jet Propulsion Laboratory. Retrieved 10 June 2018.
- 1 2 3 4 5 6 7 8 9 10 "LCDB Data for (4035)". Asteroid Lightcurve Database (LCDB). Retrieved 29 June 2016.
- ↑ "List of Jupiter Trojans". Minor Planet Center. 30 May 2018. Retrieved 10 June 2018.
- 1 2 3 "Asteroid (4035) 1986 WD – Proper elements". AstDyS-2, Asteroids – Dynamic Site. Retrieved 10 June 2018.
- 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 3 Tedesco, E. F.; Noah, P. V.; Noah, M.; Price, S. D. (October 2004). "IRAS Minor Planet Survey V6.0". NASA Planetary Data System – IRAS-A-FPA-3-RDR-IMPS-V6.0. Bibcode:2004PDSS...12.....T. Retrieved 15 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 Mottola, Stefano; Di Martino, Mario; Erikson, Anders; Gonano-Beurer, Maria; Carbognani, Albino; Carsenty, Uri; et al. (May 2011). "Rotational Properties of Jupiter Trojans. I. Light Curves of 80 Objects". The Astronomical Journal. 141 (5): 32. Bibcode:2011AJ....141..170M. doi:10.1088/0004-6256/141/5/170. Retrieved 10 June 2018.
- 1 2 Szabó, Gy. M.; Pál, A.; Kiss, Cs.; Kiss, L. L.; Molnár, L.; Hanyecz, O.; et al. (March 2017). "The heart of the swarm: K2 photometry and rotational characteristics of 56 Jovian Trojan asteroids" (PDF). Astronomy and Astrophysics. 599: 13. arXiv:1609.02760. Bibcode:2017A&A...599A..44S. doi:10.1051/0004-6361/201629401. Retrieved 10 June 2018.
- 1 2 Ryan, Erin Lee; Sharkey, Benjamin N. L.; Woodward, Charles E. (March 2017). "Trojan Asteroids in the Kepler Campaign 6 Field". The Astronomical Journal. 153 (3): 12. Bibcode:2017AJ....153..116R. doi:10.3847/1538-3881/153/3/116. Retrieved 10 June 2018.
- ↑ Veres, Peter; Jedicke, Robert; Fitzsimmons, Alan; Denneau, Larry; Granvik, Mikael; Bolin, Bryce; et al. (November 2015). "Absolute magnitudes and slope parameters for 250,000 asteroids observed by Pan-STARRS PS1 - Preliminary results" (PDF). Icarus. 261: 34–47. arXiv:1506.00762. Bibcode:2015Icar..261...34V. doi:10.1016/j.icarus.2015.08.007. Retrieved 10 June 2018.
- ↑ "Asteroid (4035) 1986 WD". Small Bodies Data Ferret. Retrieved 10 June 2018.
- ↑ "MPC/MPO/MPS Archive". Minor Planet Center. Retrieved 10 June 2018.
External links
- Asteroid Lightcurve Database (LCDB), query form (info)
- Discovery Circumstances: Numbered Minor Planets (1)-(5000) – Minor Planet Center
- (4035) 1986 WD at AstDyS-2, Asteroids—Dynamic Site
- (4035) 1986 WD at the JPL Small-Body Database