630 Euphemia
| Discovery | |
|---|---|
| Discovered by | August Kopff |
| Discovery date | March 7, 1907 |
| Designations | |
Named after | Euphemia |
| 1907 XW; A924 DC | |
| Main belt (Eunomia family) | |
| Orbital characteristics | |
| Epoch August 18, 2005 (JD 2453600.5) | |
| Aphelion | 437.1 Gm (2.922 AU) |
| Perihelion | 348.0 Gm (2.326 AU) |
| 392.5 Gm (2.624 AU) | |
| Eccentricity | 0.114 |
| 1552.5 d (4.76 a) | |
Average orbital speed | 18.33 km/s |
| 65.452° | |
| Inclination | 13.844° |
| 105.571° | |
| 40.580° | |
| Physical characteristics | |
| Dimensions | 17 km |
| Mass | ~7×1015 kg (estimate) |
Mean density | ~2.7 g/cm³ (estimate)[2] |
| ~0.006 m/s² (estimate) | |
| ~0.011 km/s (estimate) | |
| unknown | |
| Albedo | 0.238 |
| Temperature |
~165 K max: 248K (-26° C) |
Spectral type | S-type asteroid |
| 11.00 | |
|
| |
630 Euphemia is a mid-sized Eunomian asteroid.
Photometric observations at the Palmer Divide Observatory during 2005 showed a best fit rotation period of 79.18 ± 0.02 hours with a brightness variation of 0.2 ± 0.02 in magnitude. However, some uncertainty remains concerning the reliability of this result.[1]
References
- ↑ Warner, Brian D. (December 2005), "Asteroid lightcurve analysis at the Palmer Divide Observatory - spring 2005", The Minor Planet Bulletin 32 (4): 90–92, Bibcode:2005MPBu...32...90W.
- G. A. Krasinsky et al. Hidden Mass in the Asteroid Belt, Icarus, Vol. 158, p. 98 (2002).
External links
- Discovery Circumstances: Numbered Minor Planets
- NASA's Jet Propulsion Laboratory Datasite page on this space object
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