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 · Deutsch
(7) Iris ist ein Asteroid des Hauptgürtels, der am 13. August 1847 von John Russel Hind am George-Bishop-Observatorium als siebter Asteroid entdeckt wurde. Benannt wurde der Himmelskörper nach Iris, einer Götterbotin aus der griechischen Mythologie. Iris bewegt sich in einem Abstand von 1,8 (Perihel) bis 2,9 (Aphel) astronomischen Einheiten, in 3,7 Jahren auf einer exzentrischen Bahn um die Sonne. Die Bahn ist 5,5° gegen die Ekliptik geneigt, die Bahnexzentrizität beträgt 0,23. Mit einem mittleren Durchmesser von circa 200 km ist Iris einer der größten Asteroiden des Hauptgürtels. Ihre Rotationsperiode beträgt 7,1 Stunden. Iris besitzt eine helle silikatreiche Oberfläche mit einer Albedo von 0,28. Während der Opposition erreicht Iris eine Helligkeit von 8,1 mag und ist damit einer der hellsten Asteroiden am Nachthimmel. Um sie aufzufinden benötigt man allerdings ein Teleskop oder ein lichtstarkes Prismenfernglas.
Abstract from DBpedia / Wikipedia · CC BY-SA
Gallery (4)
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