(85640) 1998 OX4

Sub-kilometer asteroid March 2020 yes #FFC2E0 (85640) 1998 OX 4 Spacewatch Kitt Peak National Obs. 26 July 1998 (85640) 1998 OX 4 MPO 267962 NEO Apollo PHA Mars crosser (85640) 1998 OX4 2085640 7 April 2016AstDys-2 on 1998 OX4 Retrieved 2013-03-19NEODyS-2 on 1998 OX4 Retrieved 2013-03-19 13 January 2016 (JD 2457400.5) 2.347918212 AU Gm on on 0.81264205 AU Gm on 1.580280132 AU Gm on 0.4857608 1.99 yr (725.60 d) 4.5134807° 299.70814° 117.10906° 227.77555° 300–600 mA a noneAbsolute-magnitude conversion table (H) 21.1 0.49613853 ms / day 3656 days (10.01 yr) 0 0.00103632 AU km on 3.03959 AU Gm on (85640) 1998 OX 4 is a sub-kilometer asteroid, classified as a near-Earth object and potentially hazardous asteroid of the Apollo group. Description It was discovered on 26 July 1998 by the Spacewatch program and subsequently lost. It was re-discovered by the Near-Earth Asteroid Tracking (NEAT) project on 31 August 2002, as 2002 PJ 34. It was removed from the Sentry Risk Table on 8 August 2002. 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. It is also a Mars crossing asteroid. +H < 22 asteroids passing less than 1 LD from EarthAsteroidDateNominal approach distance (LD)Min. distance (LD)Max. distance (LD)Absolute magnitude (H)Size (meters)(152680) 1998 KJ 9 1914-12-31 0.606 0.604 0.608 19.4 279–900(458732) 2011 MD 5 1918-09-17 0.911 0.909 0.913 17.9 556–1795(163132) 2002 CU 11 1925-08-30 0.903 0.901 0.905 18.5 443–4772002 JE 9 1971-04-11 0.616 0.587 0.651 21.2 122–3932012 TY 52 1981-11-04 0.818 0.813 0.823 21.4 111–3582017 VW 13 2001-11-08 0.454 0.318 3.436 20.7 153–494(308635) 2005 YU 55 2011-11-08 0.845 0.845 0.845 21.9 320–400(153814) 2001 WN 5 2028-06-26 0.647 0.647 0.647 18.2 921–94399942 Apophis 2029-04-13 0.0981 0.0963 0.1000 19.7 310–3402005 WY 55 2065-05-28 0.865 0.856 0.874 20.7 153–494(308635) 2005 YU 55 2075-11-08 0.592 0.499 0.752 21.9 320–400(456938) 2007 YV 56 2101-01-02 0.621 0.615 0.628 21.0 133–431101955 Bennu 2135-09-25 0.780 0.308 1.406 20.19 472–512(153201) 2000 WO 107 2140-12-01 0.634 0.631 0.637 19.3 427–593(85640) 1998 OX 4 2148-01-22 0.771 0.770 0.771 21.1 127–4112011 LT 17 2156-12-16 0.998 0.955 1.215 21.6 101–327 See also 99942 Apophis Notes A a none This is assuming an albedo of 0.25–0.05. References Date/Time Removed NASA/JPL Near-Earth Object Program Office http://neo.jpl.nasa.gov/risk/removed.html https://web.archive.org/web/20020602101400/http://neo.jpl.nasa.gov/risk/removed.html dead 2002-06-02 2014-02-01 External links List Of Apollo Minor Planets, Minor Planet Center 1998 OX 4 data at MPC List of Potentially Hazardous Asteroids (PHAs) 85640 85640 1998OX4 85640 (153201) 2000 WO 107 Large NEO Earth close approach(inside the orbit of the Moon) 22 January 2148 2011 LT17 85640 (85640) 1998 OX 4 085640 085640 085640 085640 19980726