10 Hygiea
| Discovery | |
|---|---|
| Discoverer | Annibale de Gasparis |
| Discovery Date | April 12, 1849 |
| Alternate Designations | |
| Category | Hygiea family |
| Orbital Elements 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 | 1.0×1020 kg |
| Density | 2.76 g/cm³ 1 (http://www.psi.edu/pds/archive/density.html) |
| Surface Gravity | 0.1603 m/s² |
| 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 | ~217 K |
10 Hygiea ("hy JEE uh") 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.
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.
| 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) |
es:(10) Higia
fr:10 Hygée