630 Euphemia
| 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 | |
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.[5]
References
[edit]- ^ "euphemian". Oxford English Dictionary (Online ed.). Oxford University Press. (Subscription or participating institution membership required.)
- ^ a b "630 Euphemia (1907 XW)". JPL Small-Body Database. NASA/Jet Propulsion Laboratory. Retrieved 7 May 2016.
- ^ "Supplemental IRAS Minor Planet Survey". Archived from the original on 23 June 2006.
- ^ G. A. Krasinsky; et al. (2002). "Hidden Mass in the Asteroid Belt". Icarus. 158 (1): 98. Bibcode:2002Icar..158...98K. doi:10.1006/icar.2002.6837.
- ^ 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.
External links
[edit]- Lightcurve plot of 630 Euphemia, Palmer Divide Observatory, B. D. Warner (2005)
- Asteroid Lightcurve Database (LCDB), query form (info Archived 16 December 2017 at the Wayback Machine)
- Dictionary of Minor Planet Names, Google books
- Asteroids and comets rotation curves, CdR – Observatoire de Genève, Raoul Behrend
- Discovery Circumstances: Numbered Minor Planets (1)-(5000) – Minor Planet Center
- 630 Euphemia at AstDyS-2, Asteroids—Dynamic Site
- 630 Euphemia at the JPL Small-Body Database
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