| Discovery | |
|---|---|
| Discovered by: | Norman Robert Pogson |
| Discovery date: | May 23, 1856 |
| Orbital characteristics | |
| Epoch December 31, 2006 (JD 2454100.5) | |
| Aphelion | 446.706 Gm (2.986 AU) |
| Perihelion: | 283.890 Gm (1.898 AU) |
| Semi-major axis: | 365.298 Gm (2.442 AU) |
| Eccentricity: | 0.223 |
| Orbital period: | 1393.737 d (3.82 a) |
| Avg. orbital speed: | 18.82 km/s |
| Mean anomaly: | 121.874° |
| Inclination: | 8.530° |
| Longitude of ascending node: | 84.398° |
| Argument of perihelion: | 236.626° |
| Physical characteristics | |
| Dimensions: | 100.2 km |
| Mass: | 1.1×1018 kg |
| Mean density: | ? g/cm³ |
| Equatorial surface gravity: | 0.0280 m/s² |
| Escape velocity: | 0.0530 km/s |
| Rotation period: | ? d |
| Albedo: | 0.171 (geometric)[1] |
| Temperature: | ~178 K |
| Spectral type: | S |
| Apparent magnitude: | 9.18 (brightest) |
| Absolute magnitude: | 7.53 |
42 Isis (IPA: /ˈaɪsɨs/) is a large main belt asteroid. Isis was discovered by N. R. Pogson on May 23, 1856. It was his first asteroid discovery. It is named after Isis, the classical (Greek) name of an Egyptian goddess.
References
External links
- Orbital simulation from JPL (Java) / Ephemeris
| Minor planets (see full list) |
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| Previous minor planet | 42 Isis | Next minor planet |
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| 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. |
