180 Garumna
| Discovery | |
|---|---|
| Discovered by | J. Perrotin |
| Discovery date | January 29, 1878 |
| Designations | |
| Main belt | |
| Orbital characteristics[1] | |
| Aphelion | 3.181 AU |
| Perihelion | 2.260 AU |
| 2.721 AU | |
| Eccentricity | 0.169 |
| 4.49 years | |
| Inclination | 0.87° |
| Physical characteristics | |
|
Spectral type
|
S[2] |
| 10.31 | |
180 Garumna is a main belt asteroid that was discovered by the French astronomer Henri Joseph Perrotin on January 29, 1878.[3] Its name comes from the ancient Latin name for the Garonne River in France. In the Tholen classification system, it is categorized as a stony S-type asteroid, while the Bus asteroid taxonomy system lists it with the Sr sub-type.[2]
The rotation period of this asteroid is very nearly synchronized with the rotation of the Earth. This means that only a small portion of the light curve can be observed from any one location, requiring measurements from multiple sites in order to build a complete curve. In 2012, this mission was accomplished, giving a period of 23.866 ± 0.001 hours with a brightness variation of 0.42 ± 0.02 in magnitude. Allowing for a margin of error and changes in phase angle, this finding agrees with previous measurements made in 2008 and 2011.[4]
References
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