1863 Antinous

Discovery A
Discoverer	C. A. Wirtanen
Discovery date	March 7, 1948
Alternate designations B	1948 EA
Category	Apollo, Mars crosser
Orbital elements C
Epoch January 1, 2006 (JD 2453736.5 )
Eccentricity (e)	.61
Semi-major axis (a)	337.98 Gm (2.26 AU)
Perihelion (q)	132.90 Gm (0.89 AU)
Aphelion (Q)	543.06 Gm (3.63 AU)
Orbital period (P)	1240.35 d 3.40 a
Mean orbital speed	17.84 km/s
Inclination (i)	18.40°
Longitude of the ascending node (Ω)	346.60°
Argument of perihelion (ω)	267.97°
Mean anomaly (M)	341.71°
Physical characteristics D
Diameter	2 km
Mass
Density
Surface gravity
Escape velocity
Rotation period	7.46 h
Spectral class	Sq
Absolute magnitude	15.54
Albedo (geometric)	.24
Mean surface temperature
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1863 Antinous is an Apollo and Mars crosser asteroid, discovered in 1948 by Carl A. Wirtanen. It was named after Antinous of Greek mythology.

In the 20th century Antinous passed within 30 Gm of the Earth five times; it will do so only once in the 21st. The nearest distance increases each time, from 26 to 29 Gm.

References

• Catchall Catalog of Minor Planets
• NeoDys
• NASA JPL Small-Body Database Browser on 1863 Antinous
• jpl horizons
• jpl horizons telnet

See also: List of asteroids

This Near-Earth asteroid-related article is a stub. You can help Wikipedia by expanding it.