(85770) 1998 UP1

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°
 59m 17.484s / day
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]

    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. 1 2 "MPEC 1998-U17 : 1998 UP1". IAU Minor Planet Center. 1998-10-21. Retrieved 2015-02-28. (J98U01P)
    2. 1 2 3 4 "JPL Small-Body Database Browser: 85770 (1998 UP1)" (last observation: 2014-11-02; arc: 24 years). Jet Propulsion Laboratory. Retrieved 7 April 2016.
    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


    This article is issued from Wikipedia - version of the Friday, April 08, 2016. The text is available under the Creative Commons Attribution/Share Alike but additional terms may apply for the media files.