19 Fortuna
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| Discovery | |
|---|---|
| Discovered by: | John Russell Hind |
| Discovery date: | August 22, 1852 |
| Alternative names: | A902 UG |
| Minor planet category: | Main belt |
| Orbital characteristics | |
| Epoch October 22, 2004 (JD 2453300.5) | |
| Aphelion distance: | 423.443 Gm (2.831 AU) |
| Perihelion distance: | 307.028 Gm (2.052 AU) |
| Semi-major axis: | 365.235 Gm (2.441 AU) |
| Eccentricity: | 0.159 |
| Orbital period: | 1393.378 d (3.81 a) |
| Avg. orbital speed: | 18.94 km/s |
| Mean anomaly: | 268.398° |
| Inclination: | 1.573° |
| Longitude of ascending node: | 211.379° |
| Argument of perihelion: | 182.091° |
| Physical characteristics | |
| Dimensions: | 225.0 km [1] |
| Mass: | ~1.2×1019 kg |
| Mean density: | 2.0? g/cm³ |
| Equatorial surface gravity: | ~0.0629 m/s² |
| Escape velocity: | ~0.1190 km/s |
| Rotation period: | 0.3101 d (7.443 h) [2] |
| Albedo: | 0.061 [3] |
| Temperature: | ~180 K |
| Spectral type: | G |
| Absolute magnitude: | 7.13 |
19 Fortuna (IPA: [fɔɹˈtʰjunə]) is one of the largest Main belt asteroids. It has a composition similar to 1 Ceres: a darkly colored surface and composition of primitive carbon compounds (incl. tholin).
It was discovered by J. R. Hind on August 22, 1852 and named after Fortuna, the Roman goddess of luck.
The Hubble Space Telescope observed Fortuna in 1993. It was resolved with an apparent diameter of 0.20 arcseconds (4.5 pixels in the Planetary Camera) and its shape was found to be nearly spherical. Satellites were searched for but none were detected [1].
Stellar occultations by Fortuna have been observed several times.
[edit] References
- ^ http://web.media.mit.edu/~win/hstpub.pdf
- ^ http://www.psi.edu/pds/archive/lc.html
- ^ http://www.psi.edu/pds/archive/astdata/ALBEDOS/albedos.tab
| Minor planets | ||
|---|---|---|
| Previous minor planet | 19 Fortuna | Next minor planet |
| List of asteroids | ||
Vulcanoids · Near-Earth asteroids · Main belt · Jupiter Trojans · Centaurs · Damocloids · Comets · Trans-Neptunians (Kuiper belt • Scattered disc • Oort cloud)
For other objects and regions, see Asteroid groups and families, Binary asteroids, Asteroid moons and the Solar System.
For a complete listing, see List of asteroids. See also Pronunciation of asteroid names and Meanings of asteroid names.
