Skip to content
10 Hygiea

File:SPHERE_image_of_Hygiea.jpg · Wikimedia Commons · See Wikimedia Commons

EntityQ2640· pop 81· linked from 289 articles

Also known as (10) Hygiea, Hygiea

main-belt asteroid

AI overview

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.

AI-generated from the Wikipedia summary — may contain errors.

Picture of the Day · NASA

Pathfinder on Mars

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
Sources (4)

via Wikidata · CC0

~28 min read

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.

Gallery (12)