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21433 Stekramer

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Also known as Stekramer, (21433) Stekramer

asteroid

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
Followed by
21434 Stanchiang
Parent body
Sun
Minor-planet group
asteroid belt
Diameter
2.536
Orbital period
1202.937931430349
Show 15 more facts
provisional designation
1999 TH120
time of discovery or invention
1998-03-31
orbital eccentricity
0.08159290275476401
orbital inclination
3.589523082818312
periapsis
2.032973696396496
apoapsis
2.394199618126888
semi-major axis of an orbit
2.213586657261692
mean anomaly
118.0448049611152
longitude of ascending node
264.3723087505067
argument of periapsis
323.7905873573854
absolute magnitude
15.23
albedo
0.208
time of periapsis
2460606.053962511
Sources (2)

via Wikidata · CC0