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21529 Johnjames

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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
21530 Despiau
Parent body
Sun
Minor-planet group
asteroid belt
Diameter
6.128
Orbital period
1784.939997823497
Show 16 more facts
provisional designation
1998 MF37
time of discovery or invention
1998-06-26
orbital eccentricity
0.1825552174873355
apoapsis
3.405426869164374
semi-major axis of an orbit
2.879719119078551
mean anomaly
198.3601982846801
longitude of ascending node
132.7419601148849
argument of periapsis
187.7942908726723
absolute magnitude
13.41
orbital inclination
13.50408792910592
periapsis
2.354011368992728
albedo
0.325
rotation period
65.2342
time of periapsis
2461801.9370758943
Sources (2)

via Wikidata · CC0