28 Bellona

28 Bellona is a large main-belt asteroid. It was discovered by German astronomer R. Luther on March 1, 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 is in the pipeline for Unicode 17.0 as U+1CECE 𜻎 ().^[8][9]

28 Bellona

Bellona (apmag 11.8) near a magnitude 12 star, next to Abell 2670[1]
Discovery
Discovered by	R. Luther
Discovery date	1 March 1854
Designations
MPC designation	(28) Bellona
Pronunciation	/bɛˈloʊnə/[2]
Named after	Bellona
Alternative designations	1951 CC2
Minor planet category	Main belt
Adjectives	Bellonian /bɛˈloʊniən/[2]
Symbol	(historical)
Orbital characteristics
Epoch Sept 30, 2012 (JD 2456200.5)
Aphelion	477.240 Gm (3.196 AU)
Perihelion	353.977 Gm (2.358 AU)
Semi-major axis	415.608 Gm (2.777 AU)
Eccentricity	0.151
Orbital period (sidereal)	1690.19 d (4.63 a)
Mean anomaly	121.574°
Inclination	9.430°
Longitude of ascending node	144.330°
Argument of perihelion	344.461°
Physical characteristics
Dimensions	97 ± 11 km[3] 120.9 ± 3.4 km (IRAS)[4] 108.10 ± 11.49 km[5]
Mass	(2.62±0.15)×1018 kg[5]
Mean density	3.95 ± 1.28 g/cm3[5]
Synodic rotation period	15.706 h[4][6]
Geometric albedo	0.1763[4][7]
Spectral type	S [4]
Absolute magnitude (H)	7.09[4]

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.^[10] 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.^[11]

References

1. "Astrometry.net job 1005148". Astrometry.net. Retrieved 6 February 2015.
2. "Bellona". Oxford English Dictionary (Online ed.). Oxford University Press. (Subscription or participating institution membership required.)
3. 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" (PDF). 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 (PDF) on 3 March 2016. Retrieved 26 January 2012.
4. "JPL Small-Body Database Browser: 28 Bellona". Jet Propulsion Laboratory. Retrieved 28 January 2012. 2012-01-02 last obs
5. 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.
6. "Archived copy". Archived from the original on 13 September 2006. Retrieved 12 August 2006.{{cite web}}: CS1 maint: archived copy as title (link)
7. "Archived copy". Archived from the original on 22 July 2012. Retrieved 12 August 2006.{{cite web}}: CS1 maint: archived copy as title (link)
8. Bala, Gavin Jared; Miller, Kirk (18 September 2023). "Unicode request for historical asteroid symbols" (PDF). unicode.org. Unicode. Retrieved 26 September 2023.
9. Unicode. "Proposed New Characters: The Pipeline". unicode.org. The Unicode Consortium. Retrieved 6 November 2023.
10. "Radar-Detected Asteroids and Comets". NASA/JPL Asteroid Radar Research. Retrieved 30 October 2011.
11. 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
• 28 Bellona at AstDyS-2, Asteroids—Dynamic Site
  • Ephemeris · Observation prediction · Orbital info · Proper elements · Observational info
• 28 Bellona at the JPL Small-Body Database
  • Close approach · Discovery · Ephemeris · Orbit viewer · Orbit parameters · Physical parameters