1863 Antinous

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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
Dimensions 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.

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See also: List of asteroids

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Small Solar System bodies
Lists: Minor planets · Asteroid groups and families · Binary asteroids · Asteroid moons
See also: Near-Earth object · Dwarf planet · Planet · Solar System · Pronunciation of asteroid names · Meanings of asteroid names.