10 Hygiea

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10 Hygiea
Discovery A (http://cfa-www.harvard.edu/iau/lists/NumberedMPs.html)
Discoverer Annibale de Gasparis
Discovery date April 12, 1849
Alternate
designations
  B (http://cfa-www.harvard.edu/iau/MPDes.html)
Category Main belt (Hygiea)
Orbital elements C (http://asteroid.lowell.edu/)
Epoch July 14, 2004 (JD 2453200.5)
Eccentricity (e) 0.119
Semi-major axis (a) 469.345 Gm (3.137 AU)
Perihelion (q) 413.378 Gm (2.763 AU)
Aphelion (Q) 525.311 Gm (3.511 AU)
Orbital period (P) 2029.776 d (5.56 a)
Mean orbital speed 16.82 km/s
Inclination (i) 3.842
Longitude of the
ascending node
(Ω)
283.646
Argument of
perihelion
(ω)
313.557
Mean anomaly (M) 273.788
Physical characteristics
Dimensions 407.1 km
Mass 1.01020 kg
Density 2.76 g/cm 1 (http://www.psi.edu/pds/archive/density.html)
Surface gravity 0.1603 m/s
Escape velocity 0.2554 km/s
Rotation period 1.1510 d 2 (http://www.psi.edu/pds/archive/lc.html)
Spectral class C-type asteroid
Absolute magnitude 5.43
Albedo 0.072 3 (http://dorothy.as.arizona.edu/DSN/IRAS/index_iras.html)
Mean surface
temperature
~161 K

10 Hygiea (hye-jee'-a or hi-jee'-a) is the fourth largest Main belt asteroid with a diameter of 407 km. The dark-coloured surface makes the asteroid dimmer than the size would imply.

Hygiea is composed of primitive carbonaceous material similar to the chondrite meteorites. It is the main member of the Hygiea family.

It was discovered by A. de Gasparis on April 12, 1849 in Naples, Italy. It was his first of many asteroid discoveries.

It is named after Hygieia, the greek goddess of health, daughter of Asclepius (Aesculapius for the Romans). De Gasparis let his friend Ernesto Capocci name the asteroid to thank him for his encouragement.

Missing image
1_Ceres,_2_Pallas,_4_Vesta_and_10_Hygiea.png
The four largest asteroids. Top: 1 Ceres and 2 Pallas. Bottom: 4 Vesta and 10 Hygiea

The Hubble Space Telescope was able to resolve the spherical shape of the asteroid. So far there are 5 observed stellar occultations by 10 Hygiea.


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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. For pronunciation, see: Pronunciation of asteroid names.)
bg:10 Хигея

de:Hygeia es:(10) Higia fr:10 Hyge pl:Hygiea (astronomia) pt:10 Hgia

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