alcyone software


Alcyone Ephemeris Small Body Data Files

Home Contact Imprint

Asteroid 71 Niobe


Bamed after Niobe, a mortal woman in Greek mythology. She had fourteen children (Niobids), seven male and seven female.

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

ClassificationMain-belt Asteroid

Osculating Orbital Elements
Epoch2453789,5
Semi major axis2,7543 AU
Period [Julian yrs]4,571 Julian years
Inclination23,258 °
Eccentricity0,1763
Lon. of ascending node316,114 °
Argument of perihelion267,473 °
Passage of perihelion2006-Oct-27.741349
Aphelion distance3,2398 AU
Mean anomaly306,798 °

Physical Data
Radius41,71 km
Rotation period35,5 days
Absolute magnitude (H)7,3
Magnitude Slope (G)0,4
Color index (B-V)0,803
Geometric albedo0,3052
Spectral classXe

Discovery Circumstances
DiscovererRobert Luther
Discovered1861-08-13

Data File
Data File Name71_Niobe.aed
Data File Date2006-07-19
Data File Size2714 kB
Covered Period1800,00 - 2100,00