Asteroid 7 Iris
Named after Iris, the daughter of Thaumas and the ocean nymph Electra and one of the Oceanids (according to Hesiod), the personification of the rainbow and messenger of the gods in Greek mythology.
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| Classification | Main-belt Asteroid |
Osculating Orbital Elements
| Epoch | 2445813,5 |
| Semi major axis | 2,3862 AU |
| Period [Julian yrs] | 3,686 Julian years |
| Inclination | 5,511 ° |
| Eccentricity | 0,2288 |
| Lon. of ascending node | 260,135 ° |
| Argument of perihelion | 144,820 ° |
| Passage of perihelion | 1984-Sep-16.463408 |
| Aphelion distance | 2,9322 AU |
| Mean anomaly | 320,837 ° |
Physical Data
| Radius | 99,92 km |
| Rotation period | 7,139 days |
| Absolute magnitude (H) | 5,51 |
| Magnitude Slope (G) | 0,15 |
| Color index (B-V) | 0,855 |
| Geometric albedo | 0,2766 |
| Spectral class | S |
Discovery Circumstances
| Discoverer | John Russell Hind |
| Discovered | 1847-08-13 |
Data File
| Data File Name | 7_Iris.aed |
| Data File Date | 2006-07-19 |
| Data File Size | 2714 kB |
| Covered Period | 1800,00 - 2100,00 |
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