89 Julia
Discovery | |
---|---|
Discovered by | Édouard Stephan |
Discovery date | August 6, 1866 |
Designations | |
Main belt | |
Orbital characteristics | |
Epoch December 31, 2006 (JD 2454100.5) | |
Aphelion | 451.576 Gm (3.019 AU) |
Perihelion | 311.336 Gm (2.081 AU) |
381.456 Gm (2.550 AU) | |
Eccentricity | 0.184 |
1487.227 d (4.07 a) | |
Average orbital speed | 18.49 km/s |
129.159° | |
Inclination | 16.142° |
311.648° | |
44.990° | |
Physical characteristics | |
Dimensions | 151.5 km |
Mass | 3.6×1018 kg |
Mean density | ? g/cm³ |
0.0423 m/s² | |
0.0801 km/s | |
? d | |
Albedo | 0.176 (geometric) [1] |
Temperature | ~174 K |
Spectral type | S |
8.74[2] to 12.61 | |
6.60 | |
0.18" to 0.052" | |
89 Julia is a large main-belt asteroid. It was discovered by French astronomer Édouard Stephan on August 6, 1866. It was first of his two asteroid discoveries; the other was 91 Aegina. It is believed to be named after Saint Julia of Corsica. A stellar occultation by Julia was observed on December 20, 1985.
References
- ^ Asteroid Data Sets
- ^ "AstDys (89) Julia Ephemerides". Department of Mathematics, University of Pisa, Italy. Retrieved 2010-06-27.
External links
- Orbital simulation from JPL (Java)
- Ephemeris