234 Barbara
Discovery | |
---|---|
Discovered by | C. H. F. Peters |
Discovery date | August 12, 1883 |
Designations | |
1942 RL1, 1953 RE, 1975 XP |
|
Main belt | |
Orbital characteristics[1] | |
Epoch 30 January 2005 (JD 2453400.5) | |
Aphelion | 444.054 Gm (2.968 AU) |
Perihelion | 269.817 Gm (1.804 AU) |
356.935 Gm (2.386 AU) | |
Eccentricity | 0.244 |
1346.128 d (3.69 a) | |
Average orbital speed
|
19.28 km/s |
333.976° | |
Inclination | 15.352° |
144.648° | |
192.212° | |
Physical characteristics | |
Dimensions | 45.62 ± 1.93[2] km |
Mass | (0.44 ± 1.45) × 1018[2] kg |
26.5 h | |
Albedo | 0.227 |
Spectral type
|
S |
9.02 | |
234 Barbara is a main belt asteroid that was discovered by German-American astronomer Christian Heinrich Friedrich Peters on August 12, 1883 in Clinton, New York. It is classified as a stony S-type asteroid based upon its spectrum. The mean diameter is estimated as 45.6 km.[2]
Polarimetric study of this asteroid reveals anomalous properties that suggests the regolith consists of a mixture of low and high albedo material. This may have been caused by fragmentation of an asteroid substrate with the spectral properties of CO3/CV3 carbonaceous chondrites.[3]
Possible Binary Nature
Observations made in 2009 with ESO's Very Large Telescope Interferometer (VLTI) suggested that 234 Barbara may be a binary asteroid,[4] although a paper published in 2015 states that "the VLTI observations can be explained without the presence of a large satellite"[5]
References
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- ↑ 2.0 2.1 2.2 Lua error in package.lua at line 80: module 'strict' not found. See Table 1.
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External links
- The Asteroid Orbital Elements Database
- Minor Planet Discovery Circumstances
- Asteroid Lightcurve Data File
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