(92) Undina

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Asteroid
(92) Undina
Properties of the orbit ( animation )
Orbit type Outer main belt
Major semi-axis 3.19  AU
eccentricity 0.102
Perihelion - aphelion 2.864 AU - 3.516 AU
Inclination of the orbit plane 9.9 °
Length of the ascending node 101.8 °
Argument of the periapsis 241.9 °
Time of passage of the perihelion October 31, 2010
Sidereal period 5 a 255 d
Mean orbital velocity 16.6 km / s
Physical Properties
Medium diameter 126 km
Dimensions (4.43 ± 0.25) 10 17Template: Infobox asteroid / maintenance / mass kg
Albedo 0.2509
Medium density 4.39 ± 0.42 g / cm³
Rotation period 15 h 56 min
Absolute brightness 6.61 likes
Spectral class M (Tholen), Xc (Bus)
history
Explorer CHF Peters
Date of discovery July 7, 1867
Source: Unless otherwise stated, the data comes from JPL Small-Body Database Browser . The affiliation to an asteroid family is automatically determined from the AstDyS-2 database . Please also note the note on asteroid items.

(92) Undina is an asteroid of the main outer belt that was discovered on July 7, 1867 by the German-American astronomer Christian Heinrich Friedrich Peters .

The asteroid was named after Undine , a short story by the German poet Friedrich de la Motte Fouqué .

nature

Undina has a light, silicate-containing surface with an albedo of 0.251. Originally classified as a representative of the spectral class X, a more detailed spectral investigation in 2004-2005 indicated that it should rather be classified as an M-asteroid. Signs of a weak spectral band at 9 microns suggest the presence of orthopyroxene associated with an iron or pallasite composition. For (92) Undina a composition similar to the Esquel meteorite was proposed. In addition to (92) Undine, the asteroids (417) Suevia and (1124) Stroobantia with a similar composition were identified.

See also

Individual evidence

  1. a b Benoit Carry Density of Asteriods , Planetary & Space Science, 2012, Volume 73, Issue 1, pp. 98–118, doi: 10.1016 / j.pss.2012.03.009
  2. ^ Discovery Circumstances: Numbered Minor Planets. The international Astronomical Union - Minor Planet Center, accessed August 7, 2020 .
  3. S.Fornasier BEClark E.Dotto Spectroscopic Survey of X-type Asteroids , Icarus 214 (1), pp 131-146, 2011 arXiv: 1105.3380