(52768) 1998 OR2
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(52768) 1998 OR2 (provisional designation 1998 OR2) is an asteroid on an eccentric orbit, classified as a near-Earth object and potentially hazardous asteroid of the Amor group, with a diameter of 2 kilometers (1.2 mi). It was discovered on 24 July 1998, by astronomers of the Near-Earth Asteroid Tracking (NEAT) program at the Haleakala Observatory, Hawaii, it passed very near to earth on 29 April 2020 at around 4:15am.[3] It is one of the brightest and therefore largest potentially hazardous asteroids known to exist.[7] With an observation arc of 35 years, the asteroid has a well-determined orbit, and its trajectory is well known through the year 2197.[2] The asteroid's orbit is only potentially hazardous on a time scale of thousands of years.[8]
This article needs to be updated. The reason given is: New Arecibo radar results presented at the 8th IAA Planetary Defense Conference in April 2023[1]. (April 2023) |
Discovery[2][3] | |
---|---|
Discovered by | NEAT |
Discovery site | Haleakala Obs. |
Discovery date | 24 July 1998 |
Designations | |
(52768) 1998 OR2 | |
1998 OR2 | |
Amor · NEO · PHA[2][3] | |
Orbital characteristics[2] | |
Epoch 25 February 2023 (JD 2460000.5 ) | |
Uncertainty parameter 0 | |
Observation arc | 35.49 yr (12,963 days) |
Earliest precovery date | 30 June 1987 (Siding Spring Obs.) |
Aphelion | 3.750 AU |
Perihelion | 1.011 AU |
2.380 AU | |
Eccentricity | 0.5754 |
3.67 yr (1,342 days) | |
280.159° | |
0° 16m 6.082s / day | |
Inclination | 5.878° |
26.942° | |
174.580° | |
Earth MOID | 0.00866 AU (3.37 LD) |
Physical characteristics[1]: 6 | |
Dimensions | 2.08 × 1.93 × 1.60 km (± 0.10 × 0.10 × 0.03 km) |
1.78±0.10 km | |
10.67 km2 | |
Volume | 3.0±0.5 km3 |
Mean density | 3.2±0.2 g/cm3 |
4.10872±0.00001 h | |
69.3°±5° (wrt ecliptic)[lower-alpha 1] | |
Pole ecliptic latitude | 20.7°±5° |
Pole ecliptic longitude | 332.3°±5° |
0.15[5] | |
Xn or S[5] | |
15.72±0.02[6] 16.04[2][3] | |