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4811 Semashko

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Also known as Semashko, (4811) Semashko

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

Diameter
3.767
Orbital period
1230.004609038523
Show 14 more facts
provisional designation
1983 RS1
time of discovery or invention
1973-09-25
orbital eccentricity
0.1829205524626545
orbital inclination
5.055390029334919
periapsis
1.835706142883159
apoapsis
2.657629599230845
semi-major axis of an orbit
2.246667871057002
mean anomaly
233.3709423005249
longitude of ascending node
8.815756195966205
argument of periapsis
275.8810818800985
absolute magnitude
14.14
albedo
0.247
Commons category
4811 Semashko
time of periapsis
2461433.1509016906
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via Wikidata · CC0

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