Asteroid 121 Hermione
Named after Hermione, daughter of Menelaus and Helen in Greek mythology.
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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 |
Osculating Orbital Elements
Epoch | 2451630,5 |
Semi major axis | 3,4412 AU |
Period [Julian yrs] | 6,384 Julian years |
Inclination | 7,581 ° |
Eccentricity | 0,1460 |
Lon. of ascending node | 73,526 ° |
Argument of perihelion | 294,424 ° |
Passage of perihelion | 2002-Jul-24.468319 |
Aphelion distance | 3,9437 AU |
Mean anomaly | 228,845 ° |
Physical Data
Radius | 104,50 km |
Rotation period | 5,551 days |
Absolute magnitude (H) | 7,0575 |
Magnitude Slope (G) | 0,15 |
Color index (B-V) | 0,739 |
Geometric albedo | 0,0482 |
Spectral class | Ch |
Discovery Circumstances
Discoverer | James Craig Watson |
Discovered | 1872-05-12 |
Data File
Data File Name | 121_Hermione.aed |
Data File Date | 2006-12-22 |
Data File Size | 2714 kB |
Covered Period | 1800,00 - 2100,00 |
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