| Discovery | |
|---|---|
| Discovered by: | Édouard Stephan |
| Discovery date: | August 6, 1866 |
| Orbital characteristics | |
| Epoch December 31, 2006 (JD 2454100.5) | |
| Aphelion | 451.576 Gm (3.019 AU) |
| Perihelion: | 311.336 Gm (2.081 AU) |
| Semi-major axis: | 381.456 Gm (2.550 AU) |
| Eccentricity: | 0.184 |
| Orbital period: | 1487.227 d (4.07 a) |
| Avg. orbital speed: | 18.49 km/s |
| Mean anomaly: | 129.159° |
| Inclination: | 16.142° |
| Longitude of ascending node: | 311.648° |
| Argument of perihelion: | 44.990° |
| Physical characteristics | |
| Dimensions: | 151.5 km |
| Mass: | 3.6×1018 kg |
| Mean density: | ? g/cm³ |
| Equatorial surface gravity: | 0.0423 m/s² |
| Escape velocity: | 0.0801 km/s |
| Rotation period: | ? d |
| Albedo: | 0.176 (geometric) [1] |
| Temperature: | ~174 K |
| Spectral type: | S |
| Apparent magnitude: | 8.88 to 12.73 |
| Absolute magnitude: | 6.60 |
| Angular diameter: | 0.18" to 0.052" |
89 Julia is a large main belt asteroid. It was discovered by a 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
External links
- Orbital simulation from JPL (Java) / Ephemeris
| Minor planets (see full list) |
||
|---|---|---|
| Previous minor planet | 89 Julia | Next minor planet |
|
|
|---|
| Vulcanoids · Near-Earth asteroids · Main belt · Jupiter Trojans · Centaurs · Damocloids · Neptune Trojans · Comets · Trans-Neptunians (Kuiper belt • Scattered disc objects • Oort cloud) |
| For other objects and regions, see Asteroid groups and families, Binary asteroids, Asteroid moons, meteoroids and the Solar System. For a complete listing, see List of asteroids. See also Pronunciation of asteroid names and Meanings of asteroid names. |
