Astronomy:685 Hermia
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Short description: S-type asteroid native to the asteroid belt
.png) A three-dimensional model of 685 Hermia based on its light curve | |
| Discovery | |
|---|---|
| Discovered by | W. Lorenz |
| Discovery site | Heidelberg Obs. |
| Discovery date | 12 August 1909 |
| Designations | |
| (685) Hermia | |
| 1909 HE | |
| Orbital characteristics[1] | |
| Epoch 31 July 2016 (JD 2457600.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 89.52 yr (32696 d) |
| |{{{apsis}}}|helion}} | 2.6752 astronomical unit|AU (400.20 Gm) |
| |{{{apsis}}}|helion}} | 1.7969 AU (268.81 Gm) |
| 2.2360 AU (334.50 Gm) | |
| Eccentricity | 0.19640 |
| Orbital period | 3.34 yr (1221.3 d) |
| Mean anomaly | 4.11590° |
| Mean motion | 0° 17m 41.208s / day |
| Inclination | 3.6466° |
| Longitude of ascending node | 235.210° |
| 80.876° | |
| Physical characteristics | |
| Mean radius | 5.475±0.45 km |
| Rotation period | 50.40 ± 0.05 h (2.1000 ± 0.0021 d)[2] |
| Geometric albedo | 0.2807±0.050 |
| Absolute magnitude (H) | 12.0 |
685 Hermia is an S-type asteroid[3] belonging to the Flora family in the Main Belt.[2] Its diameter is about 11 km and it has an albedo of 0.281.[4]
References
- ↑ "685 Hermia (1909 HE)". JPL Small-Body Database. NASA/Jet Propulsion Laboratory. https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=685;cad=1.
- ↑ 2.0 2.1 Kryszczynska, A. et al. (October 2012). "Do Slivan states exist in the Flora family?. I. Photometric survey of the Flora region". Astronomy & Astrophysics 546: 51. doi:10.1051/0004-6361/201219199. A72. Bibcode: 2012A&A...546A..72K.
- ↑ "Asteroid Taxonomy". NASA. http://www.psi.edu/pds/resource/taxonomy.html.
- ↑ "Supplemental IRAS Minor Planet Survey (SIMPS) and IRAS Minor Planet Survey (IMPS)". NASA. http://www.psi.edu/pds/resource/imps.html.
External links
- 685 Hermia at AstDyS-2, Asteroids—Dynamic Site
- 685 Hermia at the JPL Small-Body Database
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