Remus (moon)
Remus is the inner and smaller moon of the main-belt asteroid 87 Sylvia. It follows an almost-circular and close-to-equatorial orbit around the parent asteroid. In this respect it is similar to the other Sylvian moon Romulus.
Adaptive Optics observations of (87) Sylvia, showing its two satellites, Remus and Romulus. | |
| Discovery | |
|---|---|
| Discovered by | Franck Marchis, Pascal Descamps, Daniel Hestroffer, Jérôme Berthier |
| Discovery date | August 9, 2004 |
| Designations | |
| Sylvia II | |
| Pronunciation | /ˈriːməs/ |
Named after | Rēmus |
| S/2004 (87) 1 | |
| Main belt (Cybele) | |
| Adjectives | Remian /ˈriːmiən/ |
| Orbital characteristics | |
| 706 ± 5 km | |
| Eccentricity | 0.016 ± 0.011 |
| 1.3788 ± 0.0007 d | |
Average orbital speed | 37.2 m/s |
| Inclination | 2.0 ± 1.0° (with respect to Sylvia equator) |
| Satellite of | 87 Sylvia |
| Physical characteristics | |
| Dimensions | 7 ± 2 km |
| Mass | ~ 2×1014 kg (estimate) |
Equatorial escape velocity | ~ 4 m/s (estimate) |
| unknown, probably synchronous | |
| unknown, zero expected | |
| 11.1 | |
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