Astronomy:630 Euphemia
From HandWiki
| Discovery | |
|---|---|
| Discovered by | August Kopff |
| Discovery date | 7 March 1907 |
| Designations | |
| (630) Euphemia | |
| Pronunciation | /juːˈfiːmiə/[1] |
| Named after | Euphemia |
| 1907 XW; A924 DC | |
| Minor planet category | Main belt (Eunomia family) |
| Orbital characteristics[2] | |
| Epoch 31 July 2016 (JD 2457600.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 91.87 yr (33557 d) |
| |{{{apsis}}}|helion}} | 2.9153 astronomical unit|AU (436.12 Gm) |
| |{{{apsis}}}|helion}} | 2.3334 AU (349.07 Gm) |
| 2.6244 AU (392.60 Gm) | |
| Eccentricity | 0.11086 |
| Orbital period | 4.25 yr (1552.9 d) |
| Mean anomaly | 273.57° |
| Mean motion | 0° 13m 54.588s / day |
| Inclination | 13.855° |
| Longitude of ascending node | 105.419° |
| 40.148° | |
| Physical characteristics | |
| Mean radius | 8.605±0.45 km[2] 8.5 km[3] |
| Mean density | ~2.7 g/cm3[4] |
| Rotation period | 350 h (15 d) |
| Geometric albedo | 0.2375±0.027 |
| S-type asteroid | |
| Absolute magnitude (H) | 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
- ↑ euphemian (3rd ed.), Oxford University Press, September 2005, http://oed.com/search?searchType=dictionary&q=euphemian (Subscription or UK public library membership required.)
- ↑ 2.0 2.1 "630 Euphemia (1907 XW)". JPL Small-Body Database. NASA/Jet Propulsion Laboratory. https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=630;cad=1.
- ↑ "Supplemental IRAS Minor Planet Survey". Archived from the original on 2006-06-23. https://web.archive.org/web/20060623213811/http://www.psi.edu/pds/archive/astdata04/simps04/diamalb.tab.
- ↑ G. A. Krasinsky (2002). "Hidden Mass in the Asteroid Belt". Icarus 158 (1): 98. doi:10.1006/icar.2002.6837. Bibcode: 2002Icar..158...98K.
- ↑ 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
- Lightcurve plot of 630 Euphemia, Palmer Divide Observatory, B. D. Warner (2005)
- Asteroid Lightcurve Database (LCDB), query form (info )
- 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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