(85640) 1998 OX4

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(85640) 1998 OX4
Discovery
Discovered by Spacewatch
Discovery date 26 July 1998
Designations
MPC designation (85640) 1998 OX4
MPO 267962
Apollo Apollo
NEO, PHA[1][2]
Mars crosser
Orbital characteristics[2][3][4]
Epoch 13 January 2016 (JD 2457400.5)
Uncertainty parameter 0
Observation arc 3656 days (10.01 yr)
Aphelion 2.347918212 AU (351.2435651 Gm)
Perihelion 0.81264205 AU (121.569520 Gm)
1.580280132 AU (236.4065429 Gm)
Eccentricity 0.4857608
1.99 yr (725.60 d)
227.77555°
0° 29m 46.099s / day
Inclination 4.5134807°
299.70814°
117.10906°
Earth MOID 0.00103632 AU (155,031 km)
Jupiter MOID 3.03959 AU (454.716 Gm)
Physical characteristics
Dimensions 300-600 m[a][5]
21.1[2]

(85640) 1998 OX4, also written 1998 OX4, is an Apollo asteroid and a Mars crosser. It was discovered on July 26, 1998, by the Spacewatch program and subsequently lost. It was re-discovered by the Near-Earth Asteroid Tracking (NEAT) project on August 31, 2002, as 2002 PJ34. It was removed from the Sentry Risk Table on 8 August 2002.[6] It has a well determined orbit with an observation arc of more than 10 years. It is included in the Minor Planet Center list of Potentially Hazardous Asteroids (PHAs) as it comes to within 0.05 AU of Earth periodically.

See also[edit]

Notes[edit]

  • ^ This is assuming an albedo of 0.25–0.05.

References[edit]

  1. ^ List Of Apollo Minor Planets
  2. ^ a b c "(85640) 1998 OX4". JPL Small-Body Database. Jet Propulsion Laboratory. SPK-ID: 2085640. Retrieved 7 April 2016. 
  3. ^ AstDys-2 on 1998 OX4 Retrieved 2013-03-19
  4. ^ NEODyS-2 on 1998 OX4 Retrieved 2013-03-19
  5. ^ Absolute-magnitude conversion table (H)
  6. ^ "Date/Time Removed". NASA/JPL Near-Earth Object Program Office. Retrieved 2014-02-01. 

External links[edit]

Preceded by
(153201) 2000 WO107
Large NEO Earth close approach
(inside the orbit of the Moon)

22 January 2148
Succeeded by