6 Hebe
|
|
| Discovery A (http://cfa-www.harvard.edu/iau/lists/NumberedMPs.html) | |
|---|---|
| Discoverer | Karl Ludwig Hencke |
| Discovery date | July 1, 1847 |
| Alternate designations | 1947 JB B (http://cfa-www.harvard.edu/iau/MPDes.html) |
| Category | Main belt |
| Orbital elements C (http://asteroid.lowell.edu/) Epoch July 14, 2004 (JD 2453200.5) | |
| Eccentricity (e) | 0.201 |
| Semi-major axis (a) | 362.959 Gm (2.426 AU) |
| Perihelion (q) | 289.958 Gm (1.938 AU) |
| Aphelion (Q) | 435.960 Gm (2.914 AU) |
| Orbital period (P) | 1380.373 d (3.78 a) |
| Mean orbital speed | 19.12 km/s |
| Inclination (i) | 14.765° |
| Longitude of the ascending node (Ω) | 138.846° |
| Argument of perihelion (ω) | 239.059° |
| Mean anomaly (M) | 118.017° |
| Physical characteristics | |
| Dimensions | 185.2 km |
| Mass | 6.7×1018 kg |
| Density | 2 ? g/cm³ |
| Surface gravity | 0.0518 m/s² |
| Escape velocity | 0.0979 km/s |
| Rotation period | 0.3031 d1 (http://www.psi.edu/pds/archive/lc.html) |
| Spectral class | S-type asteroid |
| Absolute magnitude | 5.71 |
| Albedo | 0.268 2 (http://dorothy.as.arizona.edu/DSN/IRAS/index_iras.html) |
| Mean surface temperature | ~171 K |
6 Hebe (hee'-bee) is a very large Main belt asteroid. It has a bright surface and composition of nickel-iron metals and silicate rocks.
Hebe was the sixth asteroid discovered, on July 1, 1847. It was the second and final asteroid discovery by Karl Ludwig Hencke, who had previously found 5 Astraea. The name "Hebe" was proposed by Carl Friedrich Gauss, and refers to the Greek goddess of youth, cupbearer for the gods of Mount Olympus until she was married to Heracles, at which point she was succeeded by the Trojan prince Ganymede.
On March 5, 1977 Hebe occulted Kaffaljidhma (γ Ceti), a moderately bright 3rd magnitude star. No other observed occultations by Hebe have been reported.
As a result of that occultation, a small satellite was reported by Paul D. Maley (4 (http://www.johnstonsarchive.net/astro/asteroidmoonsq.html)). It was nicknamed "Jebe" (see Heebie Jeebies). However, the discovery has not been confirmed.
External links
- MNRAS 7 (1847) 283 (http://adsabs.harvard.edu//full/seri/MNRAS/0007//0000283.000.html)
- MNRAS 8 (1848) 103 (http://adsabs.harvard.edu//full/seri/MNRAS/0008//0000104.000.html)
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| (For a complete listing, see: List of asteroids. For pronunciation, see: Pronunciation of asteroid names.) |