Astronomy:217 Eudora
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Short description: Main-belt asteroid
_Eudora.png) 3D model based on lightcurve data | |
| Discovery | |
|---|---|
| Discovered by | J. Coggia |
| Discovery date | 30 August 1880 |
| Designations | |
| (217) Eudora | |
| Pronunciation | /juːˈdɔːrə/[1] |
| Named after | Eudora |
| A880 QA, 1914 RA | |
| Minor planet category | Main belt |
| Orbital characteristics[2] | |
| Epoch 31 July 2016 (JD 2457600.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 130.48 yr (47657 d) |
| |{{{apsis}}}|helion}} | 3.75541 astronomical unit|AU (561.801 Gm) |
| |{{{apsis}}}|helion}} | 1.98080 AU (296.323 Gm) |
| 2.86811 AU (429.063 Gm) | |
| Eccentricity | 0.30937 |
| Orbital period | 4.86 yr (1774.2 d) |
| Average Orbital speed | 17.57 km/s |
| Mean anomaly | 349.290° |
| Mean motion | 0° 12m 10.49s / day |
| Inclination | 10.5165° |
| Longitude of ascending node | 162.594° |
| 155.320° | |
| Physical characteristics | |
| Dimensions | 66.24±2.3 km[2] 68.62 ± 1.41 km[3] |
| Mass | (1.52 ± 0.06) × 1018 kg[3] |
| Mean density | 8.98 ± 0.65 g/cm3[3] |
| Rotation period | 25.272 h (1.0530 d)[2] 25.253 ± 0.003 hr[4] |
| Geometric albedo | 0.0484±0.004 |
| C | |
| Absolute magnitude (H) | 9.80 |
Eudora (minor planet designation: 217 Eudora) is a large Main belt asteroid. It was discovered by French (Corsican) astronomer J. Coggia on August 30, 1880, in Marseilles, France. It was his fourth asteroid discovery and is named after Eudora, a Hyad in Greek mythology.
It probably has a composition similar to carbonaceous chondrites. In 2007, a study showed it rotates every 25.253 ± 0.003 hours, based on lightcurve data.[4] A light curve generated from photometric observations at Pulkovo Observatory, give a matching rotation period of 25.253 ± 0.002 hours and a brightness variation of 0.22 ± 0.04 in magnitude.[5]
See also
References
- ↑ Noah Webster (1884) A Practical Dictionary of the English Language
- ↑ 2.0 2.1 2.2 "217 Eudora". JPL Small-Body Database. NASA/Jet Propulsion Laboratory. https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=217;cad=1.
- ↑ 3.0 3.1 3.2 Carry, B. (December 2012), "Density of asteroids", Planetary and Space Science 73: pp. 98–118, doi:10.1016/j.pss.2012.03.009, Bibcode: 2012P&SS...73...98C. See Table 1.
- ↑ 4.0 4.1 Buchheim, Robert K. (March 2007), "Lightcurves for 122 Gerda, 217 Eudora, 631 Phillipina, 670 Ottegebe, and 972 Cohnia", The Minor Planet Bulletin 34 (1): pp. 113–14, Bibcode: 2007MPBu...34...13B.
- ↑ Pilcher, Frederick (October 2011), "Rotation Period Determinations for 11 Parthenope, 38 Leda, 111 Ate 194 Prokne, 217 Eudora, and 224 Oceana", The Minor Planet Bulletin 38 (4): pp. 183–185, Bibcode: 2011MPBu...38..183P.
External links
- The Asteroid Orbital Elements Database
- Minor Planet Discovery Circumstances
- Asteroid Lightcurve Data File
- 217 Eudora at AstDyS-2, Asteroids—Dynamic Site
- 217 Eudora at the JPL Small-Body Database
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