287 Nephthys

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 the goddess, Nephthys in Egyptian mythology.^[4] It is classified as an S-type asteroid.

287 Nephthys

Modelled shape of Nephthys from its lightcurve
Discovery
Discovered by	C. H. F. Peters
Discovery date	25 August 1889
Designations
MPC designation	(287) Nephthys
Pronunciation	/ˈnɛfθɪs/[1]
Named after	Nephthys
Alternative designations	A889 PB
Minor planet category	Main belt
Orbital characteristics[2]
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 (sidereal)	3.61 yr (1318.4 d)
Mean anomaly	125.74°
Mean motion	0° 16m 23.016s / day
Inclination	10.034°
Longitude of ascending node	142.381°
Time of perihelion	2022-Jul-13
Argument of perihelion	121.02°
Physical characteristics
Dimensions	67.60±1.4 km
Synodic rotation period	7.605 h (0.3169 d)
Geometric albedo	0.1851±0.008
Spectral type	S
Absolute magnitude (H)	8.30,[2] 8.26[3]