6 Hebe

Discovery
Discoverer	Karl Ludwig Hencke
Discovery Date	July 1, 1847
Alternate Designations	1947 JB
Category	Main belt
Orbital Elements 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	~245 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)

The Minor Planets

Vulcanoids | Main belt | Groups and Families | Near-Earth objects | Jupiter Trojans

Centaurs | Trans-Neptunians | Damocloids | Comets | Kuiper Belt | Oort Cloud

(For other objects and regions, see: Binary asteroids, Asteroid moons and the Solar system)

(For a complete listing, see: List of asteroids)

de:Hebe (Asteroid) fr:6 Hébé es:(6) Hebe