(85770) 1998 UP1

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1998 UP1
Discovery[1][2]
Discovered by 1998-10-18 by LINEAR
Discovery site Socorro
Designations
(85770)
Aten 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[edit]

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][dead link]

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[edit]

  1. ^ a b "MPEC 1998-U17 : 1998 UP1". IAU Minor Planet Center. 1998-10-21. Retrieved 2015-02-28.  (J98U01P)
  2. ^ a b c d "JPL Small-Body Database Browser: 85770 (1998 UP1)" (last observation: 2014-11-02; arc: 24 years). Jet Propulsion Laboratory. Retrieved 2015-02-28. 
  3. ^ "Absolute Magnitude (H)". NASA/JPL. Retrieved 2015-02-28. 
  4. ^ Rogers, John E. "Coordinated Amateur Recovery of One-Opposition NEAs". Camarillo Observatory. 
  5. ^ "JPL Close-Approach Data: 85770 (1998 UP1)" (last observation: 2014-11-02; arc: 24 years). Retrieved 2015-02-28. 

External links[edit]