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21330 Alanwhitman

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Also known as (21330) 1997 AT20, Alanwhitman

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
Diameter
3.394
Orbital period
1526.251462671512
Show 16 more facts
discoverer or inventor
Spacewatch
site of astronomical discovery
Kitt Peak National Observatory
provisional designation
1999 RF28
time of discovery or invention
1997-01-11
orbital eccentricity
0.09601829526725479
absolute magnitude
14.69
orbital inclination
4.321405011450051
periapsis
2.345190278664929
apoapsis
2.843388796302667
semi-major axis of an orbit
2.594289537483798
mean anomaly
97.14890524702133
longitude of ascending node
295.363897756397
argument of periapsis
58.6660064063873
albedo
0.292
time of periapsis
2460588.6287257494
Sources (2)

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