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Asteroid 87 Sylvia


Pogson explained that he selected the name in reference to Rhea Silvia, mother of Romulus and Remus.

This file is not available for download, but provided by the Alcyone Ephemeris Small Body Data File DVD.

ClassificationMain-belt Asteroid
FamilyCybelian asteroids
Notesorbited by two small moons (Romulus and Remus)

Osculating Orbital Elements
Epoch2449718,5
Semi major axis3,4869 AU
Period [Julian yrs]6,511 Julian years
Inclination10,873 °
Eccentricity0,0815
Lon. of ascending node73,741 °
Argument of perihelion272,269 °
Passage of perihelion1991-Sep-30.218147
Aphelion distance3,7710 AU
Mean anomaly179,948 °

Physical Data
Radius130,47 km
Rotation period5,184 days
Absolute magnitude (H)6,7783
Magnitude Slope (G)0,15
Color index (B-V)0,71
Geometric albedo0,0435
Spectral classX

Discovery Circumstances
DiscovererNorman Robert Pogson
Discovered1866-05-16

Data File
Data File Name87_Sylvia.aed
Data File Date2006-07-19
Data File Size2714 kB
Covered Period1800,00 - 2100,00