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EntityQ691004· pop 22

Also known as Semois

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
Named after
Semois
Followed by
Q711736
Follows
Q628673
Parent body
Sun
Diameter
25.526
Orbital period
2920.472316086354
Show 17 more facts
discoverer or inventor
Henri Debehogne
site of astronomical discovery
La Silla Observatory
provisional designation
1988 SQ
time of discovery or invention
1988-09-18
orbital eccentricity
0.1748447061031256
absolute magnitude
11.72
orbital inclination
12.64579156715193
periapsis
3.299429108713604
apoapsis
4.697681576068494
semi-major axis of an orbit
3.998555342391049
mean anomaly
285.487942559042
longitude of ascending node
354.3734918155885
argument of periapsis
289.7637866224792
albedo
0.074
rotation period
7.456
time of periapsis
2461604.9733360303
Sources (2)

via Wikidata · CC0