580 Selene

580 Selene

Discovery
Discovered by	M. F. Wolf
Discovery site	Heidelberg
Discovery date	17 December 1905
Designations
Alternative names	1905 SE
Orbital characteristics[1]
Epoch 31 July 2016 (JD 2457600.5)
Uncertainty parameter 0
Observation arc	110.29 yr (40283 d)
Aphelion	3.4971 AU (523.16 Gm)
Perihelion	2.9628 AU (443.23 Gm)
Semi-major axis	3.2300 AU (483.20 Gm)
Eccentricity	0.082713
Orbital period	5.81 yr (2120.3 d)
Mean anomaly	45.310°
Mean motion	0° 10^m 11.244^s / day
Inclination	3.6614°
Longitude of ascending node	99.154°
Argument of perihelion	334.542°
Earth MOID	1.97666 AU (295.704 Gm)
Jupiter MOID	1.72509 AU (258.070 Gm)
Jupiter Tisserand parameter	3.178
Physical characteristics
Mean radius	22.895±1.6 km
Rotation period	9.47 h (0.395 d)
Geometric albedo	0.1218±0.019
Absolute magnitude (H)	10.3

580 Selene is a minor planet orbiting the Sun. The name Selene is that of an ancient Greek goddess of the Moon.

This body orbits the Sun nearly mid-way between the orbits of Mars and Jupiter. The orbital eccentricity is slightly lower than that of Mars. Based on its light curve, Selene has an estimated rotation period of 0.3947±0.0004 days, or just under 9.5 hours.^[2] During each rotation, the apparent magnitude varies by 0.27. The approximate diameter of this asteroid is 46 km.^[3] (Some sources list a diameter of up to 56 km.) The albedo is about 7%, comparable to that of the Earth's Moon.

References

1. "580 Selene (1905 SE)". JPL Small-Body Database. NASA/Jet Propulsion Laboratory. Retrieved 5 May 2016.
2. Antonini, Pierre (2005-05-16). "Courbes de rotation d'astéroïdes et de comètes" (in French). Observatoire de Genève. Archived from the original on 8 July 2006. Retrieved 2006-06-12.
3. "Occultation by (580) Selene". RASNZ Occultation Section. 2005-01-18. Retrieved 2006-06-12.

External links

• Discovery Circumstances: Numbered Minor Planets
• 580 Selene at the JPL Small-Body Database

• Discovery · Orbit diagram · Orbital elements · Physical parameters