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21631 Stephenhonan

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Also known as Stephenhonan

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
21632 Suwanasri
Parent body
Sun
Minor-planet group
asteroid belt
Orbital period
1367.549641033895
Show 14 more facts
provisional designation
4182 T-3
time of discovery or invention
1999-07-13
orbital eccentricity
0.1506235239611629
longitude of ascending node
141.8418986663836
argument of periapsis
105.6149006393163
absolute magnitude
15.29
orbital inclination
4.85241720983195
periapsis
2.048000275763571
apoapsis
2.774361382554659
semi-major axis of an orbit
2.411180829159115
mean anomaly
61.9899168923238
time of periapsis
2460765.015865017
Sources (2)

via Wikidata · CC0