1566 Icarus

From Academic Kids

1566 Icarus
Discovery A (http://cfa-www.harvard.edu/iau/lists/NumberedMPs.html)
Discoverer Walter Baade
Discovery date June 27, 1949
Alternate
designations
1949 MA B (http://cfa-www.harvard.edu/iau/MPDes.html)
Category Apollo asteroid,
Mercury-crosser asteroid,
Venus-crosser asteroid,
Mars-crosser asteroid
Orbital elements C (http://asteroid.lowell.edu/)
Epoch July 14, 2004 (JD 2453200.5)
Eccentricity (e) 0.827
Semi-major axis (a) 161.257 Gm (1.078 AU)
Perihelion (q) 27.923 Gm (0.187 AU)
Aphelion (Q) 294.590 Gm (1.969 AU)
Orbital period (P) 408.778 d (1.12 a)
Mean orbital speed 28.69 km/s
Inclination (i) 22.854°
Longitude of the
ascending node
(Ω)
88.090°
Argument of
perihelion
(ω)
31.290°
Mean anomaly (M) 124.422°
Physical characteristics
Dimensions 1.4 km
Mass 2.9×1012 kg
Density 2 ? g/cm³
Surface gravity 0.000 39 m/s²
Escape velocity 0.000 74 km/s
Rotation period 0.094 71 d
Spectral class U
Absolute magnitude 16.9
Albedo 0.4 [1] (http://cdsads.u-strasbg.fr/cgi-bin/bib_query?1989AJ.....97.1211V)
Mean surface
temperature
~242 K

1566 Icarus is an Apollo asteroid (a sub-class of near-Earth asteroid) whose unusual characteristic is that at perihelion it is closer to the Sun than Mercury; it is said to be a Mercury-crosser asteroid. It is also a Venus- and a Mars-crosser.

Icarus flies past Earth every 19 years. The last time was in 1997. Often it comes as close as 6.4 Gm (4 million miles). It passed only 600,000 km (not quite twice as far as the Moon) from Earth in 1968.

It is named after Icarus of Greek mythology, who flew too close to the Sun. It was discovered in 1949 by Walter Baade.

Icarus in fiction


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The minor planets
Vulcanoids | Main belt | Groups and families | Near-Earth objects | Jupiter Trojans
Centaurs | Trans-Neptunians | Damocloids | Comets | Kuiper belt | Oort cloud
(For other objects and regions, see: Binary asteroids, Asteroid moons and the Solar system)
(For a complete listing, see: List of asteroids. For pronunciation, see: Pronunciation of asteroid names.)
da:1566 Ikaros

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