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سیارک ۲۲۳۰

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Also known as Yunnan

سیارک

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

Small body data

(2230) Yunnan

Orbit class
Main-belt
Semi-major axis
2.859 AU
Eccentricity
0.060
Inclination
2.573 °
Absolute magnitude
12.170 H

via Minor Planet Center

Wikidata facts

Instance of
asteroid
Named after
Yunnan
Followed by
2231 Durrell
Parent body
Sun
Minor-planet group
asteroid belt
Diameter
11.431
Orbital period
1765.844585100183
Show 17 more facts
discoverer or inventor
Purple Mountain Observatory
site of astronomical discovery
Purple Mountain Observatory
provisional designation
1978 UT1
time of discovery or invention
1978-10-29
orbital eccentricity
0.06015643190026661
orbital inclination
2.572945468105705
periapsis
2.687148129737223
apoapsis
3.031139936372244
semi-major axis of an orbit
2.859144033054734
mean anomaly
262.7548423971289
longitude of ascending node
153.6715971497773
argument of periapsis
255.1468623466451
absolute magnitude
12.17
albedo
0.258
rotation period
10.0381
time of periapsis
2461477.499541612
Sources (2)

via Wikidata · CC0