630 Euphemia
| Discovery | |
|---|---|
| Discovered by | August Kopff |
| Discovery date | 7 March 1907 |
| Designations | |
| (630) Euphemia | |
| Pronunciation | |
Named after |
Euphemia |
| 1907 XW; A924 DC | |
| Main belt (Eunomia family) | |
| Orbital characteristics | |
| Epoch 31 July 2016 (JD 2457600.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 91.87 yr (33557 d) |
| Aphelion | 2.9153 AU (436.12 Gm) |
| Perihelion | 2.3334 AU (349.07 Gm) |
| 2.6244 AU (392.60 Gm) | |
| Eccentricity | 0.11086 |
| 4.25 yr (1552.9 d) | |
| 273.57° | |
| 0° 13m 54.588s / day | |
| Inclination | 13.855° |
| 105.419° | |
| 40.148° | |
| Physical characteristics | |
Mean radius |
8.605±0.45 km 8.5 km |
Mean density
|
~2.7 g/cm3 |
| 350 h (15 d) | |
| 0.2375±0.027 | |
| S-type asteroid | |
| 11.1 | |
|
| |
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.