(85770) 1998 UP1
| Discovery[1][2] | |
|---|---|
| Discovered by | 1998-10-18 by LINEAR |
| Discovery site | Socorro |
| Designations | |
| (85770) | |
Aten  | |
| Orbital characteristics[2] | |
|
Epoch 2457000.5 (2014-Dec-09) | |
| Aphelion | 1.3426 AU |
| Perihelion | 0.65378 AU |
| 0.99818 AU | |
| Eccentricity |
0.34503 (14,000 w.r.t. Earth) |
|
364.26 d 1.00 yr | |
| 158.55° | |
| Inclination | 33.18° |
| 18.363° | |
| 234.29° | |
| Physical characteristics | |
| Dimensions | 210–470 meters[3] |
| 20.5[2] | |
|
| |
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
- ↑ 1.0 1.1 "MPEC 1998-U17 : 1998 UP1". IAU Minor Planet Center. 1998-10-21. Retrieved 2015-02-28. (J98U01P)
- ↑ 2.0 2.1 2.2 2.3 "JPL Small-Body Database Browser: 85770 (1998 UP1)" (last observation: 2014-11-02; arc: 24 years). Jet Propulsion Laboratory. Retrieved 2015-02-28.
- ↑ "Absolute Magnitude (H)". NASA/JPL. Retrieved 2015-02-28.
- ↑ Rogers, John E. "Coordinated Amateur Recovery of One-Opposition NEAs". Camarillo Observatory.
- ↑ "JPL Close-Approach Data: 85770 (1998 UP1)" (last observation: 2014-11-02; arc: 24 years). Retrieved 2015-02-28.