(12538) 1998 OH

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(12538) 1998 OH

Discovery[2] and designation
Discovered by	NEAT
Discovery date	1998-07-19
Designations
Alternative names[1]	none
Minor planet category	Apollo[citation needed]
Orbital characteristics[3]
Epoch December 31, 2006 (JD 2454100.5)
Aphelion	324.262 Gm (2.168 AU)
Perihelion	136.964 Gm (0.916 AU)
Semi-major axis	230.613 Gm (1.542 AU)
Eccentricity	0.406
Orbital period	699.095 d (1.91 a)
Average orbital speed	22.97 km/s
Mean anomaly	209.975°
Inclination	24.515°
Longitude of ascending node	220.817°
Argument of perihelion	321.621°
Physical characteristics
Dimensions	~3 km
Mass	~2.8×1013 kg
Mean density	2.0? g/cm³
Equatorial surface gravity	~0.0008 m/s²
Equatorial escape velocity	~0.0016 km/s
Sidereal rotation period	? d
Axial tilt	?°
Pole ecliptic latitude	?
Pole ecliptic longitude	?
Geometric albedo	0.10?
Temperature	~224 K
Spectral type	?
Absolute magnitude	16.1

(12538) 1998 OH is an earth-crosser asteroid that was discovered in 1998. It has a diameter of 2-4 kilometers^[2], and is expected to pass close to the Earth in 2042 and 2132. [4]

[edit] References

v • d • e Minor planets navigator 12537 Kendriddle       ·       (12538) 1998 OH       ·       12539 Chaikin

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