Astraea
Astraea
Asteroid
Aquarius
Visible
Level 5
Expert level - Timing dependent
Properties
Magnitude
9.8
Type: Asteroid
Distance: 2.577 AU
Orbital Period: 1510.9 days
Diameter: 107 km
Fifth asteroid discovered; named after Greek goddess of justice and innocence; S-type asteroid; parent body of the Astraea family.
Position & Identifiers
RA
21h 38m 22.2s
Dec
-13° 08' 10.4"
Constellation
Aquarius
Catalog
Astraea
Physical Properties
Diameter
107 km
Mass
2.8e18 kg
Albedo
0.27
(27% reflected)
Rotation
16.8 hours
Angular Size
0.0″ (current)
Orbital Properties
Semi-major Axis
2.5769 AU
(385.5 million km)
Eccentricity
0.1875
Inclination
5.36°
Orbital Period
4.14 years
Distance
3.690 AU
(30.7 light-min)
Elongation
43.6°
Moderate
Observing Tips
Best Months
June
, July
, August
Visibility
Telescope
Where to Look
In asteroid belt
Notes
Fifth asteroid discovered; named after Greek goddess of justice and innocence; S-type asteroid; parent body of the Astraea family.
Discovery
Discovered by
Karl Ludwig Hencke
Date
1845-12-08
Current Ephemeris
3.690
AU from Earth
552.0M
km
0.0″
Angular Size
44°
Elongation
Visibility
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