69 Hesperia
From Infogalactic: the planetary knowledge core
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A three-dimensional model of 69 Hesperia based on its light curve.
|
|
| Discovery | |
|---|---|
| Discovered by | G. Schiaparelli |
| Discovery date | April 29, 1861[1] |
| Designations | |
|
Named after
|
Hesperia |
| Main belt | |
| Orbital characteristics | |
| Epoch (absent) | |
| Aphelion | 519.3 Gm (3.471 AU) |
| Perihelion | 372.3 Gm (2.489 AU) |
| 445.8 Gm (2.980 AU) | |
| Eccentricity | 0.165 |
| 1879 d (5.14 a) | |
| Inclination | 8.59° |
| Physical characteristics | |
| Dimensions | 138 km (IRAS)[2] 135x106x98 km[3] 110 ± 15 km[3] |
| Mass | (5.86 ± 1.18) × 1018[4] kg |
|
Mean density
|
4.38 ± 0.99[4] g/cm3 |
| 5.655 h[2] | |
| Albedo | 0.140[2] |
|
Spectral type
|
M |
| 7.05[2] | |
69 Hesperia (/hɛsˈpɪəriə/ hes-PEER-ee-ə) is a large, M-type main-belt asteroid. It was discovered by the famous Italian astronomer Giovanni Schiaparelli on April 29, 1861[1] from Milan. It was his only asteroid discovery. Schiaparelli named it Hesperia in honour of Italy (the word is a Greek term for the peninsula).[5]
Hesperia was observed by Arecibo radar in February 2010.[3] Radar observations combined with lightcurve-based shape models, lead to a diameter estimate of 110 ± 15 km.[3]
References
- ↑ 1.0 1.1 Lua error in package.lua at line 80: module 'strict' not found.
- ↑ 2.0 2.1 2.2 2.3 Lua error in package.lua at line 80: module 'strict' not found.
- ↑ 3.0 3.1 3.2 3.3 Lua error in package.lua at line 80: module 'strict' not found.
- ↑ 4.0 4.1 Lua error in package.lua at line 80: module 'strict' not found. See Table 1.
- ↑ Lutz D. Schmadel, Dictionary of Minor Planet Names, p.22.
External links
- Orbital simulation from JPL (Java) / Ephemeris
- Bareket Observatory (Asteroid 69 Hesperia movie - through an Earth-based telescope.) (Hebrew)
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