287 Nephthys

287 Nephthys

Discovery
Discovered by	C. H. F. Peters
Discovery date	25 August 1889
Designations
Named after	Nephthys
Minor planet category	Main belt
Orbital characteristics[1]
Epoch 31 July 2016 (JD 2457600.5)
Uncertainty parameter 0
Observation arc	119.35 yr (43594 d)
Aphelion	2.4080 AU (360.23 Gm)
Perihelion	2.29814 AU (343.797 Gm)
Semi-major axis	2.3531 AU (352.02 Gm)
Eccentricity	0.023344
Orbital period	3.61 yr (1318.4 d)
Average orbital speed	19.42 km/s
Mean anomaly	125.74°
Mean motion	0° 16^m 23.016^s / day
Inclination	10.034°
Longitude of ascending node	142.381°
Argument of perihelion	121.02°
Earth MOID	1.29505 AU (193.737 Gm)
Jupiter MOID	2.61483 AU (391.173 Gm)
Jupiter Tisserand parameter	3.535
Physical characteristics
Dimensions	67.60±1.4 km
Rotation period	7.605 h (0.3169 d)
Geometric albedo	0.1851±0.008
Spectral type	S
Absolute magnitude (H)	8.30,[1] 8.26[2]

287 Nephthys is a large Main belt asteroid that was discovered by German-American astronomer C. H. F. Peters on August 25, 1889 in Clinton, New York and named after Nephthys in Egyptian mythology.^[3] It is classified as an S-type asteroid.

References

1. Yeomans, Donald K., "287 Nephthys", JPL Small-Body Database Browser, NASA Jet Propulsion Laboratory, retrieved 11 May 2016.
2. Warner, Brian D. (December 2007), "Initial Results of a Dedicated H-G Project", The Minor Planet Bulletin, 34, pp. 113–119, Bibcode:2007MPBu...34..113W.
3. Schmadel, Lutz D. (2012), Dictionary of Minor Planet Names, Springer, p. 38, ISBN 3642297188.

External links

• 287 Nephthys at the JPL Small-Body Database
  
  • Discovery · Orbit diagram · Orbital elements · Physical parameters