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6 Hebe
| Discovery A |
| Discoverer |
Karl Ludwig Hencke |
| Discovery date |
July 1, 1847 |
Alternate
designations |
1947 JB B |
| Category |
Main belt |
| Orbital elements C D |
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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 |
| Spectral class |
S-type asteroid |
| Absolute magnitude |
5.71 |
| Albedo |
0.268 2 |
Mean surface
temperature |
~170 K |
6 Hebe (hee'-bee, Greek ‘Ήβη) is a very large Main belt asteroid. It has a bright surface and composition of nickel-iron metals and silicate rocks.
Size comparison: the first 10 asteroids profiled against Earth's Moon. Hebe is fifth from the right.
Hebe was the sixth asteroid to be 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 Hebe 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 Hebean moon was reported by Paul D. Maley (4). It was nicknamed "Jebe" (see Heebie Jeebies). However, the discovery has not been confirmed.
Aspects
| Stationary, retrograde |
Opposition |
Distance to
Earth (AU) |
Maximum
brightness (mag) |
Stationary, prograde |
Conjunction to Sun |
| February 26, 2005 |
April 13, 2005 |
1.94756 |
9.9 |
June 12, 2005 |
December 1, 2005 |
| June 26, 2006 |
August 5, 2006 |
1.12052 |
7.8 |
September 15, 2006 |
May 26, 2007 |
| December 21, 2007 |
February 7, 2008 |
1.59540 |
8.8 |
March 25, 2008 |
September 25, 2008 |
| March 17, 2009 |
May 2, 2009 |
1.88760 |
9.9 |
July 1, 2009 |
December 25, 2009 |
| August 27, 2010 |
September 22, 2010 |
0.97626 |
7.7 |
November 2, 2010 |
July 7, 2011 |
| January 12, 2012 |
February 28, 2012 |
1.77490 |
9.4 |
April 19, 2012 |
October 13, 2012 |
| April 6, 2013 |
May 24, 2013 |
1.74529 |
9.6 |
July 20, 2013 |
January 24, 2014 |
| October 12, 2014 |
November 17, 2014 |
1.07073 |
8.1 |
December 31, 2014 |
August 5, 2015 |
| February 1, 2016 |
March 17, 2016 |
1.89612 |
9.8 |
May 13, 2016 |
October 31, 2016 |
| May 1, 2017 |
June 18, 2017 |
1.52235 |
9.1 |
August 8, 2017 |
March 6, 2018 |
| November 13, 2018 |
December 29, 2018 |
1.27267 |
8.5 |
February 10, 2019 |
August 28, 2019 |
| February 19, 2020 |
April 4, 2020 |
1.94859 |
9.9 |
June 2, 2020 |
November 20, 2020 |
Links
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The minor planets
Vulcanoids | Main belt | Groups and families | Near-Earth objects | Jupiter Trojans
Centaurs | Damocloids | Comets | Trans-Neptunians (Kuiper belt | Scattered disc | Oort cloud)
For other objects and regions, see: Binary asteroids, Asteroid moons and the Solar system
For a complete listing, see: List of asteroids. For pronunciation, see: Pronunciation of asteroid names.
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