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21392 Helibrochier

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Also known as Helibrochier, (21392) Helibrochier

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
Parent body
Sun
Minor-planet group
asteroid belt
Orbital period
1257.631825637178
Show 15 more facts
provisional designation
2000 WL143
time of discovery or invention
1998-03-20
orbital eccentricity
0.1073842122933407
apoapsis
2.5250407369857
semi-major axis of an orbit
2.280184879786628
mean anomaly
141.2142213603875
longitude of ascending node
197.7495960508533
argument of periapsis
201.5284662019816
absolute magnitude
15.13
orbital inclination
6.330296723182405
periapsis
2.035329022587555
rotation period
13.736
time of periapsis
2460507.1791694015
Sources (2)

via Wikidata · CC0