|Discovered by 1998-10-18 by LINEAR|
Alternative names (85770)
Observation arc 8787 days (24.06 yr)
Discovered 18 October 1998
Asteroid group Aten asteroid
|Discovery date 18 October 1998|
Minor planet category Aten
Aphelion 1.3427 AU (200.87 Gm)
Discovery site Socorro
|Discoverer Lincoln Near-Earth Asteroid Research|
Similar Sun, Solar System, 54509 YORP, 2002 AA29, 2003 YN107
1998 UP1 is a near Earth, Aten asteroid orbiting at nearly a 1:1 resonance with Earth.
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°. The preliminary period of 1998 UP1 was originally thought to be slightly longer than 1 year 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.
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.