Asteroid 87 Sylvia
Pogson explained that he selected the name in reference to Rhea Silvia, mother of Romulus and Remus.
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This file is not available for download, but provided by the Alcyone Ephemeris Small Body Data File DVD.
Classification | Main-belt Asteroid |
Family | Cybelian asteroids |
Notes | orbited by two small moons (Romulus and Remus) |
Osculating Orbital Elements
Epoch | 2449718,5 |
Semi major axis | 3,4869 AU |
Period [Julian yrs] | 6,511 Julian years |
Inclination | 10,873 ° |
Eccentricity | 0,0815 |
Lon. of ascending node | 73,741 ° |
Argument of perihelion | 272,269 ° |
Passage of perihelion | 1991-Sep-30.218147 |
Aphelion distance | 3,7710 AU |
Mean anomaly | 179,948 ° |
Physical Data
Radius | 130,47 km |
Rotation period | 5,184 days |
Absolute magnitude (H) | 6,7783 |
Magnitude Slope (G) | 0,15 |
Color index (B-V) | 0,71 |
Geometric albedo | 0,0435 |
Spectral class | X |
Discovery Circumstances
Discoverer | Norman Robert Pogson |
Discovered | 1866-05-16 |
Data File
Data File Name | 87_Sylvia.aed |
Data File Date | 2006-07-19 |
Data File Size | 2714 kB |
Covered Period | 1800,00 - 2100,00 |
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