1566 Icarus

1566 Icarus
	Radar image of Icarus taken by the Goldstone Observatory in June 2015
Discovery
Discovered by	W. Baade
Discovery site	Palomar Obs.
Discovery date	27 June 1949
Designations
MPC designation	(1566) Icarus
Pronunciation	/ˈɪkərəs/
Named after	Icarus (Greek mythology)
Alternative designations	1949 MA
Minor planet category	NEO; Apollo; PHA; Mercury-crosser; Venus-crosser; Mars-crosser;
Adjectives	Icarian /aɪˈkɛəriən/
Symbol	(astrological)
Orbital characteristics
	Epoch 1 July 2021 (JD 2459396.5)
	Uncertainty parameter 0
Observation arc	72.11 yr (26,339 d)
Aphelion	1.9697 AU
Perihelion	0.1865 AU
Semi-major axis	1.0781 AU
Eccentricity	0.8270
Orbital period (sidereal)	1.12 yr (409 d)
Mean anomaly	180.73°
Mean motion	0° 52m 49.8s / day
Inclination	22.812°
Longitude of ascending node	87.981°
Argument of perihelion	31.419°
Earth MOID	0.0341 AU (13.3 LD)
Physical characteristics
Dimensions	1.61 km × 1.60 km × 1.17 km
Mean diameter	1.0 km; 1.03±0.04 km; 1.27 km; 1.417±0.123 km; 1.44±0.26 km;
Synodic rotation period	2.268 h; 2.27±0.05 h; 2.2726±0.0003 h; 2.273 h; 2.27364 h; 2.2794±0.0005 h;
Geometric albedo	0.14; 0.14±0.10; 0.199±0.110; 0.29±0.05; 0.33; 0.40; 0.51;
Spectral type	S; S/Q; B–V = 0.774; U–B = 0.520;
Absolute magnitude (H)	16.35

1566 Icarus (/ˈɪkərəs/ IK-ə-rəs; provisional designation: 1949 MA) is a large near-Earth object of the Apollo group and the lowest numbered potentially hazardous asteroid. It has an extremely eccentric orbit (0.83) and measures approximately 1.4 km (0.87 mi) in diameter. In 1968, it became the first asteroid ever observed by radar. Its orbit brings it closer to the Sun than Mercury and further out than the orbit of Mars, which also makes it a Mercury-, Venus-, and Mars-crossing asteroid. This stony asteroid and relatively fast rotator with a period of 2.27 hours was discovered on 27 June 1949, by German astronomer Walter Baade at the Palomar Observatory in California. It was named after the mythological Icarus.

This article is issued from Wikipedia. The text is licensed under Creative Commons - Attribution - Sharealike. Additional terms may apply for the media files.