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سیارک ۷

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

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سیارک ۷

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Also known as (7) Iris, Iris

سیارک

AI overview

"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

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
Sources (6)

via Wikidata · CC0

Gallery (4)