(85770) 1998 UP1
| Discovery[1][2] | |
|---|---|
| Discovered by | 1998-10-18 by LINEAR |
| Discovery site | Socorro |
| Discovery date | 18 October 1998 |
| Designations | |
| (85770) | |
Aten  |
|
| Orbital characteristics[2] | |
| Epoch 13 January 2016 (JD 2457400.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 8787 days (24.06 yr) |
| Aphelion | 1.3427 AU (200.87 Gm) |
| Perihelion | 0.65377 AU (97.803 Gm) |
| 0.99826 AU (149.338 Gm) | |
| Eccentricity | 0.34509 |
| 1.00 yr (364.30 d) | |
| 193.86° | |
| Inclination | 33.180° |
| 18.357° | |
| 234.27° | |
| Earth MOID | 0.0833366 AU (12.46698 Gm) |
| Jupiter MOID | 3.77026 AU (564.023 Gm) |
| Physical characteristics | |
| Dimensions | 210–470 meters[3] |
| 20.5[2] | |
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1998 UP1 is a near Earth, Aten asteroid orbiting at nearly a 1:1 resonance with Earth.
Orbit
With an orbital period of 364.3 days, 1998 UP1 is in a near 1:1 orbital resonance with Earth. Although their periods are almost identical, their orbits are very different; 1998 UP1 has a highly eccentric orbit and moves between 0.65 – 1.35 AU from the Sun, it is also very highly inclined at 33°.[2] The preliminary period of 1998 UP1 was originally thought to be slightly longer than 1 year[1] producing an error in the predicted position of about 35 degrees; it was selected as a priority for recovery and recovered by the Camarillo Observatory on 12 October 1999.[4]
1998 UP1 also makes close approaches to Venus and will pass 0.0255 AU (3,810,000 km; 2,370,000 mi) from Venus on 24 January 2115.[5]
References
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<references />, or <references group="..." />External links
- MPEC 1998-U17
- MPEC 1999-T52
- (85770) = 1998 UP1 Orbit – Minor Planet Center
- (85770) 1998 UP1 at the JPL Small-Body Database
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