92 Undina

92 Undina

Discovery
Discovered by	Christian Heinrich Friedrich Peters
Discovery date	July 7, 1867
Designations
Alternative names
Minor planet category	Main belt, Veritas family
Orbital characteristics
Epoch December 31, 2006 (JD 2454100.5)
Aphelion	525.202 Gm (3.511 AU)
Perihelion	429.240 Gm (2.869 AU)
Semi-major axis	477.221 Gm (3.190 AU)
Eccentricity	0.101
Orbital period	2081.086 d (5.70 a)
Average orbital speed	16.63 km/s
Mean anomaly	117.332°
Inclination	9.922°
Longitude of ascending node	101.830°
Argument of perihelion	242.178°
Physical characteristics
Dimensions	124.44 ± 3.25 km[1]
Mass	(4.43 ± 0.25) × 10^18 kg[1]
Mean density	4.39 ± 0.42[1] g/cm^3
Albedo	0.251 [2]
Temperature	~156 K
Spectral type	M
Absolute magnitude (H)	6.61

92 Undina (/ʌnˈdaɪnə/ un-DY-nə; Latin: Undīna) is a large main belt asteroid. It has an unusually high albedo and an M-type spectrum. It was discovered by C. H. F. Peters on July 7, 1867. It is named for the eponymous heroine of Undine, a popular novella by Friedrich de la Motte Fouqué. Undina is a member of the Veritas asteroid family, which formed some eight million years ago. See 490 Veritas for details.

Observations performed at the Palmer Divide Observatory in Colorado Springs, Colorado in during 2007 produced a light curve with a period of 15.941 ± 0.002 hours with a brightness range of 0.20 ± 0.02 in magnitude. This matches a 15.94 hour period reported in 1979.^[3]

References

1. Carry, B. (December 2012), "Density of asteroids", Planetary and Space Science 73, pp. 98–118, arXiv:1203.4336, Bibcode:2012P&SS...73...98C, doi:10.1016/j.pss.2012.03.009. See Table 1.
2. Asteroid Data Sets
3. Warner, Brian D. (September 2007), "Asteroid Lightcurve Analysis at the Palmer Divide Observatory", The Minor Planet Bulletin, Bibcode:2007MPBu...34...72W.

External links

• 92 Undina at the JPL Small-Body Database

• Discovery · Orbit diagram · Orbital elements · Physical parameters