431 Nephele

431 Nephele
Discovery
Discovered by	Auguste Charlois
Discovery date	18 December 1897
Designations
Named after	Nephele
Alternative names	1897 DN
Minor planet category	Main belt (Themis)
Orbital characteristics^[1]
Epoch 31 July 2016 (JD 2457600.5)
Uncertainty parameter 0
Observation arc	113.52 yr (41462 d)
Aphelion	3.67837 AU (550.276 Gm)
Perihelion	2.61178 AU (390.717 Gm)
Semi-major axis	3.14507 AU (470.496 Gm)
Eccentricity	0.16957
Orbital period	5.58 yr (2037.3 d)
Average orbital speed	16.81 km/s
Mean anomaly	230.611°
Mean motion	0° 10^m 36.152^s / day
Inclination	1.82752°
Longitude of ascending node	117.229°
Argument of perihelion	216.161°
Earth MOID	1.60112 AU (239.524 Gm)
Jupiter MOID	1.68154 AU (251.555 Gm)
Jupiter Tisserand parameter	3.186
Physical characteristics
Dimensions	7004950300000000000♠95.03±1.6 km
Mass	unknown
Mean density	unknown
Equatorial surface gravity	unknown
Equatorial escape velocity	unknown
Rotation period	18.821 h (0.7842 d)
Geometric albedo	6998636000000000000♠0.0636±0.002
Temperature	unknown
Spectral type	C
Absolute magnitude (H)	8.72

431 Nephele is a large Themistian asteroid. It is spectral C-type and is probably composed of carbonaceous material.

It was discovered by Auguste Charlois on December 18, 1897 in Nice.

References

Minor planets navigator

430 Hybris 431 Nephele 432 Pythia

Designation Groups Moons Meanings of names Pronunciation of names

Asteroids	Aten asteroid Asteroid belt Families Jupiter Trojans Near-Earth Spectral types

Distant minor planets	Centaurs Damocloids Neptune trojans Trans-Neptunian objects Detached Kuiper belt Oort cloud Scattered disc

Lists / categories

This article is issued from Wikipedia - version of the 9/10/2016. The text is available under the Creative Commons Attribution/Share Alike but additional terms may apply for the media files.