| Minorplanet: | yes |
| Background: |
|
| 28 Bellona | |
| Symbol: | (historical) |
| Discovered: | 1 March 1854 |
| Mpc Name: | (28) Bellona |
| Adjective: | Bellonian |
| Epoch: | Sept 30, 2012 (JD 2456200.5) |
| Semimajor: | 415.608 Gm (2.777 AU) |
| Perihelion: | 353.977 Gm (2.358 AU) |
| Aphelion: | 477.240 Gm (3.196 AU) |
| Eccentricity: | 0.151 |
| Period: | 1690.19 d (4.63 a) |
| Inclination: | 9.430° |
| Asc Node: | 144.330° |
| Arg Peri: | 344.461° |
| Mean Anomaly: | 121.574° |
| Dimensions: | 97 ± 11 km 120.9 ± 3.4 km (IRAS) 108.10 ± 11.49 km |
| Density: | 3.95 ± 1.28 g/cm3 |
| Rotation: | 15.706 h[1] |
| Spectral Type: | S  |
| Abs Magnitude: | 7.09 |
| Albedo: | 0.1763[2] |
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 .[3] [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.[5] 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.