27 Euterpe
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Discovery
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| Discovered by | J. R. Hind |
| Discovery date | November 8, 1853 |
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Designations
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| Named after | Euterpe |
| Alternate name(s) | 1945 KB |
| Minor planet category |
Main belt |
| Epoch June 14, 2006 (JD 2453900.5) | |
| Aphelion | 411.552 Gm (2.751 AU) |
| Perihelion | 290.966 Gm (1.945 AU) |
| Semi-major axis | 351.259 Gm (2.348 AU) |
| Eccentricity | 0.172 |
| Orbital period | 1314.171 d (3.60 a) |
| Average orbital speed | 19.29 km/s |
| Mean anomaly | 126.457° |
| Inclination | 1.584° |
| Longitude of ascending node | 94.807° |
| Argument of perihelion | 356.754° |
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Physical characteristics
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| Dimensions | 124×75 km (Dunham)† |
| Mass | 9.3×1017? kg |
| Mean density | 2.0? g/cm³ |
| Equatorial surface gravity | 0.0268? m/s² |
| Escape velocity | 0.0508? km/s |
| Rotation period | 0.4338 d (10.41 h) [1] |
| Albedo | 0.162 (geometric) [2] |
| Temperature | ~178 K |
| Spectral type | S |
| Apparent magnitude | 8.30 to 12.55 |
| Absolute magnitude (H) | 7.0 |
| Angular diameter | 0.13" to 0.035" |
27 Euterpe (
/juːˈtɜrpiː/ ew-TUR-pee; Greek: Ευτέρπη) is a large main-belt asteroid.
It was discovered by J. R. Hind on November 8, 1853, and named after Euterpe, the Muse of music in Greek mythology.
Euterpe is one of the brightest asteroids in the night sky.[3] On December 25, 2015, during a perihelic opposition, it will shine with an apparent magnitude of 8.3.[4]
Euterpe has been studied by radar.[5]
[edit] References
- ^ http://www.psi.edu/pds/asteroid/EAR_A_5_DDR_DERIVED_LIGHTCURVE_V8_0/data/lc.tab
- ^ http://www.psi.edu/pds/asteroid/EAR_A_5_DDR_ALBEDOS_V1_1/data/albedos.tab
- ^ "Bright Minor Planets 2004". Minor Planet Center. http://www.cfa.harvard.edu/iau/Ephemerides/Bright/2004/. Retrieved 2008-05-20.
- ^ Yeomans, Donald K. "Horizons Online Ephemeris System". California Institute of Technology, Jet Propulsion Laboratory. http://ssd.jpl.nasa.gov/horizons.cgi?find_body=1&body_group=sb&sstr=27. Retrieved 2008-05-20.
- ^ "Radar-Detected Asteroids and Comets". NASA/JPL Asteroid Radar Research. http://echo.jpl.nasa.gov/asteroids/. Retrieved 2011-10-30.
[edit] External links
- Orbital simulation from JPL (Java) / Ephemeris
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