File:SPHERE_image_of_Hygiea.jpg · Wikimedia Commons · See Wikimedia Commons
10 Hygiea is a large asteroid located in the main asteroid belt between Mars and Jupiter. It's one of the largest asteroids in our solar system and is important to scientists studying the early formation and composition of rocky bodies in space.
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Picture of the Day · NASA

Pathfinder on Mars
2026-07-04
On July 4th, 1997, using its own array of fireworks, a parachute, and a cocoon of airbags, the Mars Pathfinder spacecraft bounced like a giant beach ball at least 15 times before it came to rest on the surface of Mars at 10:07 AM Pacific Daylight Time. After its then novel airbag-assisted landing sequence was completed, Pathfinder transmitted this color mosaic to mission operators on Earth. In the scene from another world, the Mars Sojourner robot rover is visible in the foreground, crouched on top of the unfolded Pathfinder. About the size of a large house cat, the six-wheeled, solar-powered Sojourner became the first successful Martian rover. Surrounding Pathfinder are deflated airbags and the rock-strewn terrain of the Ares Vallis floodplain. In the distance Martian hills appear against a dusty brownish sky. The Pathfinder lander was subsequently renamed the Carl Sagan Memorial Station.
via NASA APOD
Wikidata facts
- Instance of
- asteroid
- Named after
- Hygieia
- Followed by
- 11 Parthenope
- Follows
- 9 Metis
- Parent body
- Sun
- Minor-planet group
- asteroid belt
- Diameter
- 407.12
- Mass
- 903
- Orbital period
- 2039.698321691231
- Image
- SPHERE image of Hygiea.jpg
Show 25 more facts
- discoverer or inventor
- Annibale de Gasparis
- site of astronomical discovery
- Astronomical Observatory of Capodimonte
- Commons category
- 10 Hygiea
- provisional designation
- A849 GA
- time of discovery or invention
- 1849-04-12
- asteroid spectral type
- C-type asteroid
- orbital inclination
- 3.832937411259753
- density
- 2.56
- rotation period
- 13.828
- albedo
- 0.0717
- title
- (10) Hygiea
- page(s)
- 16-16
- Unicode character
- ⯚
- surface gravity
- 0.12
- flattening
- 0.06
- absolute magnitude
- 5.65
- orbital eccentricity
- 0.1082238330841652
- semi-major axis of an orbit
- 3.147591335335692
- periapsis
- 2.806946936043158
- apoapsis
- 3.488235734628226
- longitude of ascending node
- 283.1216602809548
- argument of periapsis
- 312.6058061790707
- mean anomaly
- 216.6903206173814
- time of periapsis
- 2461812.4680903303
- epoch
- November 21, 2025
via Wikidata · CC0
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Encyclopedic overview
Spectral type C Apparent magnitude 9.0 to 12.0 Absolute magnitude (H) 5.65 Angular diameter 0.1 to 0.3 arcseconds
10 Hygiea is a large asteroid in the outer region of the main asteroid belt, between the orbits of Mars and Jupiter. It was the tenth known asteroid, discovered on 12 April 1849 by Italian astronomer Annibale de Gasparis at the Astronomical Observatory of Capodimonte in Naples, Italy. It was named after Hygieia, the Greek goddess of health. It is the fourth-largest main-belt asteroid by both volume and mass, with a mean diameter of 433 km (269 mi) and a mass constituting 3% of the main asteroid belt's total mass.
Excerpted from Wikipedia’s “10 Hygiea” article, available under the CC BY-SA 4.0 licence.
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