(85770) 1998 UP1 (provisional designation 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 at a nominal distance of 0.02563 AU (3,830,000 km; 2,380,000 mi) from Venus at 19:13 hours on 24 January 2115.[5]

Animation of (85770) 1998 UP1 orbit from 1600 to 2500
Relative to Sun and Earth
Around Earth
Around Sun
   Sun ·    Earth ·    (85770) 1998 UP1

References

  1. ^ a b "MPEC 1998-U17 : 1998 UP1". IAU Minor Planet Center. 21 October 1998. Retrieved 28 February 2015. (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. Archived from the original on 19 September 2020. Retrieved 7 April 2016.
  3. ^ "Absolute Magnitude (H)". NASA/JPL. Archived from the original on 2 March 2001. Retrieved 28 February 2015.
  4. ^ Rogers, John E. Coordinated Amateur Recovery of One-Opposition NEAs. The Minor Planet Amateur / Professional Workshop 2001. Camarillo Observatory.
  5. ^ "JPL Close-Approach Data: 85770 (1998 UP1)" (last observation: 2014-11-02; arc: 24 years). Retrieved 28 February 2015.


Allikas: http://en.wikipedia.org/wiki/(85770)_1998_UP1
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