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From Wikipedia, the free encyclopedia
630 Euphemia is a mid-sized Eunomian asteroid.
Discovery | |
---|---|
Discovered by | August Kopff |
Discovery date | 7 March 1907 |
Designations | |
(630) Euphemia | |
Pronunciation | /juːˈfiːmiə/[1] |
Named after | Euphemia |
1907 XW; A924 DC | |
Main belt (Eunomia family) | |
Orbital characteristics[2] | |
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 | |
8.605±0.45 km[2] 8.5 km[3] | |
Mean density | ~2.7 g/cm3[4] |
350 h (15 d) | |
0.2375±0.027 | |
S-type asteroid | |
11.1 | |
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.[5]
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