89 Julia
From Infogalactic: the planetary knowledge core
VLT-SPHERE image of Julia. The large crater Nonza, half the diameter of the asteroid, is centered on the upper left quadrant.
|
|
| Discovery | |
|---|---|
| Discovered by | Édouard Stephan |
| Discovery date | August 6, 1866 |
| Designations | |
| Main belt | |
| Orbital characteristics[1] | |
| 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 | 147.57 ± 8.32[2] km |
| Mass | (6.71 ± 1.82) × 1018[2] kg |
|
Mean density
|
3.98 ± 1.27[2] g/cm3 |
| 0.0423 m/s² | |
| 0.0801 km/s | |
| 11.387 ± 0.002[3] h | |
| Albedo | 0.176 (geometric) [4] |
| Temperature | ~174 K |
|
Spectral type
|
S |
| 8.74[5] to 12.61 | |
| 6.60 | |
| 0.18" to 0.052" | |
89 Julia is a large main-belt asteroid that was discovered by French astronomer Édouard Stephan on August 6, 1866. This was first of his two asteroid discoveries; the other was 91 Aegina. 89 Julia is believed to be named after Saint Julia of Corsica. A stellar occultation by Julia was observed on December 20, 1985.
The spectrum of 89 Julia shows the signature of silicate rich minerals with possible indications of an abundant calcic clinopyroxene component. It is classified as an S-type asteroid.[3]
References
- ↑ Lua error in package.lua at line 80: module 'strict' not found.
- ↑ 2.0 2.1 2.2 Lua error in package.lua at line 80: module 'strict' not found. See Table 1.
- ↑ 3.0 3.1 Lua error in package.lua at line 80: module 'strict' not found.
- ↑ Asteroid Data Sets
- ↑ Lua error in package.lua at line 80: module 'strict' not found.
External links
- Orbital simulation from JPL (Java)
- Ephemeris
