(9928) 1981 WE9
 | |||||||||||||
| Discovery | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Discovered by | Perth Observatory | ||||||||||||
| Discovery date | 16 November 1981 | ||||||||||||
| Designations | |||||||||||||
| (9928) 1981 WE9 | |||||||||||||
| 1971 TJ1, 1993 FC43 | |||||||||||||
| Main Belt asteroid | |||||||||||||
| Orbital characteristics[1] | |||||||||||||
| Epoch 13 January 2016 (JD 2457400.5) | |||||||||||||
| Uncertainty parameter 0 | |||||||||||||
| Observation arc | 23598 days (64.61 yr) | ||||||||||||
| Aphelion | 2.6102853 AU (390.49312 Gm) | ||||||||||||
| Perihelion | 1.8267175 AU (273.27305 Gm) | ||||||||||||
| 2.2185014 AU (331.88309 Gm) | |||||||||||||
| Eccentricity | 0.1765984 | ||||||||||||
| 3.30 yr (1206.9 d) | |||||||||||||
| 161.48772° | |||||||||||||
| 0° 17m 53.784s / day | |||||||||||||
| Inclination | 2.845283° | ||||||||||||
| 179.44727° | |||||||||||||
| 175.82661° | |||||||||||||
| Earth MOID | 0.820125 AU (122.6890 Gm) | ||||||||||||
| Jupiter MOID | 2.81813 AU (421.586 Gm) | ||||||||||||
| Physical characteristics | |||||||||||||
| Dimensions | ~12.9 km[2] | ||||||||||||
| 18.3980 h (0.76658 d) | |||||||||||||
| 5.547 h[3] | |||||||||||||
| ~0.01 | |||||||||||||
| |||||||||||||
| 14.7 | |||||||||||||
(9928) 1981 WE9 is a main belt asteroid. It orbits the Sun once every 3.30 years.[1] It is associated with the Flora family of asteroids.[4]
Discovered on November 16, 1981, by the Perth Observatory in Bickley, it was given the provisional designation "1981 WE9".[5]
References
- ^ a b "JPL Small-Body Database Browser: 9928 (1981 WE9)". NASA/Jet Propulsion Laboratory. Retrieved 5 April 2016.
- ^ Tedesco E.F.; Noah P.V.; Noah M.; Price S.D. "The supplemental IRAS minor planet survey (SIMPS)".
- ^ Maurice Clark. "Asteroid 9928 1981 WE9". Montgomery College.
- ^ Zappalà, Vincenzo; Bendjoya, Philippe; Cellino, Alberto; Farinella, Paolo; Froeschlé, Claude (1997). "Asteroid Dynamical Families". EAR-A-5-DDR-FAMILY-V4.1. NASA Planetary Data System.
- ^ MPO 65995 Minor Planet Center
External links
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