Discovery | |
---|---|
Discovered by | Spacewatch |
Discovery site | Kitt Peak National Obs. |
Discovery date | 26 July 1998 |
Designations | |
(85640) 1998 OX4 | |
MPO 267962 | |
Orbital characteristics [1] [2] [3] | |
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] [4] |
21.1 [1] | |
(85640) 1998 OX4 ( provisional designation 1998 OX4) is a sub-kilometer asteroid, classified as near-Earth object and potentially hazardous asteroid of the Apollo group.
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 PJ34. It was removed from the Sentry Risk Table on 8 August 2002. [5] 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
Asteroid | Date | Nominal approach distance (LD) | Min. distance (LD) | Max. distance (LD) | Absolute magnitude (H) | Size (meters) |
---|---|---|---|---|---|---|
(152680) 1998 KJ9 | 1914-12-31 | 0.606 | 0.604 | 0.608 | 19.4 | 279–900 |
(458732) 2011 MD5 | 1918-09-17 | 0.911 | 0.909 | 0.913 | 17.9 | 556–1795 |
(163132) 2002 CU11 | 1925-08-30 | 0.903 | 0.901 | 0.905 | 18.5 | 443–477 |
2002 JE9 | 1971-04-11 | 0.616 | 0.587 | 0.651 | 21.2 | 122–393 |
2012 TY52 | 1981-11-04 | 0.818 | 0.813 | 0.823 | 21.4 | 111–358 |
2017 VW13 | 2001-11-08 | 0.454 | 0.318 | 3.436 | 20.7 | 153–494 |
(308635) 2005 YU55 | 2011-11-08 | 0.845 | 0.845 | 0.845 | 21.9 | 320–400 |
(153814) 2001 WN5 | 2028-06-26 | 0.647 | 0.647 | 0.647 | 18.2 | 921–943 |
99942 Apophis | 2029-04-13 | 0.0981 | 0.0963 | 0.1000 | 19.7 | 310–340 |
2005 WY55 | 2065-05-28 | 0.865 | 0.856 | 0.874 | 20.7 | 153–494 |
(308635) 2005 YU55 | 2075-11-08 | 0.592 | 0.499 | 0.752 | 21.9 | 320–400 |
(456938) 2007 YV56 | 2101-01-02 | 0.621 | 0.615 | 0.628 | 21.0 | 133–431 |
101955 Bennu | 2135-09-25 | 0.780 | 0.308 | 1.406 | 20.19 | 472–512 |
(153201) 2000 WO107 | 2140-12-01 | 0.634 | 0.631 | 0.637 | 19.3 | 427–593 |
(85640) 1998 OX4 | 2148-01-22 | 0.771 | 0.770 | 0.771 | 21.1 | 127–411 |
2011 LT17 | 2156-12-16 | 0.998 | 0.955 | 1.215 | 21.6 | 101–327 |
Discovery | |
---|---|
Discovered by | Spacewatch |
Discovery site | Kitt Peak National Obs. |
Discovery date | 26 July 1998 |
Designations | |
(85640) 1998 OX4 | |
MPO 267962 | |
Orbital characteristics [1] [2] [3] | |
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] [4] |
21.1 [1] | |
(85640) 1998 OX4 ( provisional designation 1998 OX4) is a sub-kilometer asteroid, classified as near-Earth object and potentially hazardous asteroid of the Apollo group.
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 PJ34. It was removed from the Sentry Risk Table on 8 August 2002. [5] 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
Asteroid | Date | Nominal approach distance (LD) | Min. distance (LD) | Max. distance (LD) | Absolute magnitude (H) | Size (meters) |
---|---|---|---|---|---|---|
(152680) 1998 KJ9 | 1914-12-31 | 0.606 | 0.604 | 0.608 | 19.4 | 279–900 |
(458732) 2011 MD5 | 1918-09-17 | 0.911 | 0.909 | 0.913 | 17.9 | 556–1795 |
(163132) 2002 CU11 | 1925-08-30 | 0.903 | 0.901 | 0.905 | 18.5 | 443–477 |
2002 JE9 | 1971-04-11 | 0.616 | 0.587 | 0.651 | 21.2 | 122–393 |
2012 TY52 | 1981-11-04 | 0.818 | 0.813 | 0.823 | 21.4 | 111–358 |
2017 VW13 | 2001-11-08 | 0.454 | 0.318 | 3.436 | 20.7 | 153–494 |
(308635) 2005 YU55 | 2011-11-08 | 0.845 | 0.845 | 0.845 | 21.9 | 320–400 |
(153814) 2001 WN5 | 2028-06-26 | 0.647 | 0.647 | 0.647 | 18.2 | 921–943 |
99942 Apophis | 2029-04-13 | 0.0981 | 0.0963 | 0.1000 | 19.7 | 310–340 |
2005 WY55 | 2065-05-28 | 0.865 | 0.856 | 0.874 | 20.7 | 153–494 |
(308635) 2005 YU55 | 2075-11-08 | 0.592 | 0.499 | 0.752 | 21.9 | 320–400 |
(456938) 2007 YV56 | 2101-01-02 | 0.621 | 0.615 | 0.628 | 21.0 | 133–431 |
101955 Bennu | 2135-09-25 | 0.780 | 0.308 | 1.406 | 20.19 | 472–512 |
(153201) 2000 WO107 | 2140-12-01 | 0.634 | 0.631 | 0.637 | 19.3 | 427–593 |
(85640) 1998 OX4 | 2148-01-22 | 0.771 | 0.770 | 0.771 | 21.1 | 127–411 |
2011 LT17 | 2156-12-16 | 0.998 | 0.955 | 1.215 | 21.6 | 101–327 |