| Minorplanet | yes |
|---|---|
| Background |
|
| Discoverer | Robert Luther |
| Discovered | 1 March 1854 |
| Mpc name | (28) Bellona |
| Pronounced | /bɛˈloʊnə/[1] |
| Adjective | Bellonian /bɛˈloʊniən/[1] |
| Named after | Bellona |
| Mp category | Main belt |
| Epoch | 21 November 2025 (JD 2461000.5) |
| Semimajor | 2.777 AU |
| Perihelion | 2.364 AU |
| Aphelion | 3.191 AU |
| Eccentricity | 0.149 |
| Period | 4.628 yr (1690.55 d) |
| Inclination | 9.432° |
| Asc node | 144.151° |
| Arg peri | 343.462° |
| Mean anomaly | 65.459° |
| Jupiter moid | 1.872 AU |
| Tisserand | 3.299 |
| Dimensions | 97 ± 11 km[2] 120.9 ± 3.4 km (IRAS)[3] 108.10 ± 11.49 km[4] |
| Mass | 2.62 ± 0.15×1018 kg[4] |
| Density | 3.95 ± 1.28 g/cm3[4] |
| Rotation | 15.706 h[3][5] |
| Abs magnitude | 7.09[3] |
| Albedo | 0.1763[3][6] |
28 Bellona is a large asteroid located in the main-belt. It was discovered by German astronomer Robert Luther on 1 March 1854, and named after Bellōna, the Roman goddess of war; the name was chosen to mark the beginning of the Crimean War. Its historical symbol was Bellona's whip and spear; it was encoded in Unicode 17.0 as U+1CECE ().[7][8]
Bellona is a stony (S-type) asteroid with a cross-section size of around 100–120 km. 28 Bellona is orbiting the Sun with a period of 4.63 years.
Bellona has been studied by radar.[9] Photometric observations of this asteroid at the Palmer Divide Observatory in Colorado Springs, Colorado in 2007 gave a light curve with a period of 15.707 ± 0.002 hours and a brightness variation of 0.27 ± 0.03 in magnitude. This report is in close agreement with a period estimate of 15.695 hours reported in 1983, and rejects a longer period of 16.523 hours reported in 1979.[10]
References
- ^
- ^ Ďurech, Josef; Kaasalainen, Mikko; Herald, David; Dunham, David; Timerson, Brad; Hanuš, Josef et al. (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. S2CID 119271216. Archived from the original on 3 March 2016. Retrieved 26 January 2012.
- ^ "JPL Small-Body Database Browser: 28 Bellona". Jet Propulsion Laboratory. Retrieved 22 January 2026.
2025-07-08 last obs
- ^ Carry, B. (December 2012), "Density of asteroids", Planetary and Space Science. 73 (1): 98–118, arXiv:1203.4336. Bibcode:2012P&SS...73...98C. doi:10.1016/j.pss.2012.03.009. S2CID 119226456 See Table 1.
- ^ "Archived copy". Archived from the original on 13 September 2006. Retrieved 12 August 2006.
- ^ "Archived copy". Archived from the original on 22 July 2012. Retrieved 12 August 2006.
- ^ Bala, Gavin Jared & Miller, Kirk (18 September 2023). "Unicode request for historical asteroid symbols". unicode.org. Unicode. Retrieved 26 September 2023.
- ^ "Miscellaneous Symbols Supplement". unicode.org. The Unicode Consortium. 2025. Retrieved September 9, 2025.
- ^ "Radar-Detected Asteroids and Comets". NASA/JPL Asteroid Radar Research. Retrieved 2011-10-30.
- ^ Warner, Brian D. (December 2007), "Asteroid Lightcurve Analysis at the Palmer Divide Observatory - March-May 2007", The Minor Planet Bulletin. 34 (4): 104–107, Bibcode:2007MPBu...34..104W
External links
- Lightcurve plot of 28 Bellona, Palmer Divide Observatory, B. D. Warner (2007)
- Asteroid Lightcurve Database (LCDB), query form (info Archived 16 December 2017 at the Wayback Machine)
- 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