(85770) 1998 UP1

Last updated

(85770) 1998 UP1
Discovery [1] [2]
Discovered by LINEAR
Discovery site Lincoln Lab's ETS
Discovery date18 October 1998
Designations
1998 UP1
NEO  · 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°
0° 59m 17.484s / day
Inclination 33.180°
18.357°
234.27°
Earth  MOID 0.0833366 AU (12.46698 Gm)
Physical characteristics
210–470 meters [3]
20.5 [2]

    (85770) 1998 UP1 (provisional designation 1998 UP1) is a near Earth, Aten asteroid orbiting at nearly a 1:1 resonance with Earth.

    Contents

    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
    Animarion of (85770) 1998 UP1 orbit.gif
    Relative to Sun and Earth
    Animation of (85770) 1998 UP1 orbit around Earth.gif
    Around Earth
    Animation of (85770) 1998 UP1 orbit around Sun.gif
    Around Sun
       Sun ·   Earth ·   (85770) 1998 UP1

    References

    1. 1 2 "MPEC 1998-U17 : 1998 UP1". IAU Minor Planet Center. 21 October 1998. Retrieved 28 February 2015. (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. 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.


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