28 Bellona
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Bellona (apmag 11.8) near a mag 12 star and background galaxies
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Discovery
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| Discovered by | R. Luther |
| Discovery date | March 1, 1854 |
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Designations
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| Alternate name(s) | 1951 CC2 |
| Minor planet category |
Main belt |
| Epoch June 14, 2006 (JD 2453900.5) | |
| Aphelion | 477.240 Gm (3.190 AU) |
| Perihelion | 353.977 Gm (2.366 AU) |
| Semi-major axis | 415.608 Gm (2.778 AU) |
| Eccentricity | 0.148 |
| Orbital period | 1691.362 d (4.63 a) |
| Average orbital speed | 17.77 km/s |
| Mean anomaly | 353.997° |
| Inclination | 9.401° |
| Longitude of ascending node | 144.503° |
| Argument of perihelion | 342.548° |
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Physical characteristics
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| Dimensions | 97 ± 11 km[1] 120.9 ± 3.4 km (IRAS)[2] |
| Mass | 1.9×1018? kg (assumed) |
| Mean density | 2.0? g/cm³ |
| Equatorial surface gravity | 0.0338? m/s² |
| Escape velocity | 0.0639? km/s |
| Rotation period | 15.706 h[2][3] |
| Albedo | 0.1763[2][4] |
| Temperature | ~163 K |
| Spectral type | S[2] |
| Absolute magnitude (H) | 7.09[2] |
28 Bellona (
/bɛˈloʊnə/ be-loh-nə; Latin: Bellōna) is a large main-belt asteroid.
Bellona was discovered by R. Luther on March 1, 1854. It is named after Bellona, the Roman goddess of war; the name was chosen to mark the beginning of the Crimean War.
Bellona has been studied by radar.[5]
[edit] References
- ^ Ďurech, Josef; Kaasalainen, Mikko; Herald, David; Dunham, David; Timerson, Brad; Hanuš, Josef; Frappa, Eric; Talbot, John; Hayamizu, Tsutomu; Warner, Brian D.; Pilcher, Frederick; Galád, Adrián (2011). "Combining asteroid models derived by lightcurve inversion with asteroidal occultation silhouettes". Icarus 214 (2): 652–670. arXiv:1104.4227. Bibcode 2011Icar..214..652D. doi:10.1016/j.icarus.2011.03.016. http://astro.troja.mff.cuni.cz/projects/asteroids3D/download/durech_et_al_2011_occ_paper.pdf.
- ^ a b c d e "JPL Small-Body Database Browser: 28 Bellona". Jet Propulsion Laboratory. 2012-01-02 last obs. http://ssd.jpl.nasa.gov/sbdb.cgi?sstr=28. Retrieved 2012-01-28.
- ^ 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
- ^ "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
- "Elements and Ephemeris for (28) Bellona". Minor Planet Center. http://scully.cfa.harvard.edu/cgi-bin/returnprepeph.cgi?d=b2011&o=00028.
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