File:Iris_asteroid_eso.jpg · Wikimedia Commons · See Wikimedia Commons
"7 Iris" is a large asteroid located in the main asteroid belt between Mars and Jupiter. It matters to astronomers and scientists because studying such large main-belt asteroids helps us understand the composition and history of our solar system.
AI-generated from the Wikipedia summary — may contain errors.
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
- Iris
- Followed by
- 8 Flora
- Follows
- 6 Hebe
- Parent body
- Sun
- Minor-planet group
- asteroid belt
- Diameter
- 199.83
- Mass
- 17900000000000000000
- Orbital period
- 1346.63063987869
- Image
- Iris asteroid eso.jpg
Show 21 more facts
- discoverer or inventor
- John Russell Hind
- site of astronomical discovery
- Bishop Observatory
- Commons category
- 7 Iris
- time of discovery or invention
- 1847-08-13
- asteroid spectral type
- S-type asteroid
- orbital inclination
- 5.518812907722005
- density
- 3.18
- rotation period
- 7.139
- albedo
- 0.2766
- surface gravity
- 0.12
- provisional designation
- A847 PA
- absolute magnitude
- 5.67
- orbital eccentricity
- 0.2302133123218598
- semi-major axis of an orbit
- 2.386528966120767
- periapsis
- 1.837118227878042
- apoapsis
- 2.935939704363492
- longitude of ascending node
- 259.4946100599047
- argument of periapsis
- 145.4820251256263
- mean anomaly
- 61.72501808502953
- time of periapsis
- 2460769.608887221
- epoch
- November 21, 2025
Sources (6)
via Wikidata · CC0
Article · Français
(7) Iris est un astéroïde de la ceinture principale. Il a une surface claire et semble être composé de nickel, de fer et de silicates de magnésium. Iris fut la première découverte, le 13 août 1847, de J. R. Hind de Londres, au Royaume-Uni. Il porte le nom de la déesse grecque de l'arc-en-ciel, Iris, sœur des Harpies et messagère des dieux, en particulier Junon. Sa qualité de servante de Junon était particulièrement appropriée car il fut découvert suivant 3 Junon par moins d'une heure d'ascension droite. Les premiers astéroïdes découverts possèdent un symbole astronomique et celui de Iris est Iris occulta une étoile le 26 mai 1995, et une autre le 25 juillet 1997. Les deux observations lui donnent un diamètre d'environ 200 km. Opposition de l'astéroïde 7 Iris avec le Soleil : * 29 mai 2106 (dist. au Soleil = 2,866 UA ; magnitude = 9,2) * 27 octobre 2017 à 9 h 4.
Abstract from DBpedia / Wikipedia · CC BY-SA
Gallery (4)
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