(8814) Rosseven Main-belt Asteroid
Discovered on 1 December 1983 by E. Bowell at Anderson Mesa.
William Brendan Parsons, Seventh Earl of Rosse (b. 1936), was inspired to restore the 1.8-m reflecting telescope (the “Leviathan of Parsonstown”) at Birr Castle, County Offaly, Ireland, to full working order. The task took three years and was completed in 1999. The name was suggested by S. Mitton.Naming citation (20000726/MPCPages.arc), IAU / Minor Planet Center, via NASA/JPL
Where Rosseven is today
Seen from above the solar system on 2026-10-14: Rosseven is 3.42 au from the Sun and 4.22 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 8814 |
| Provisional designation | 1983 XG |
| Orbit class | Main-belt Asteroid |
| Diameter | 17.0 km (#2,659 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.0370 |
| Rotation period | 107 hours |
| Absolute magnitude (H) | 12.8 |
| Orbital period | 5.65 years |
| Semi-major axis | 3.17 au |
| Perihelion – aphelion | 2.65 – 3.70 au |
| Eccentricity | 0.166 |
| Inclination | 4.85° |
| Closest distance between its orbit and Earth's (MOID) | 1.65 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
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