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21817 Yingling

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Also known as Yingling

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
21818 Yurkanin
Parent body
Sun
Minor-planet group
asteroid belt
Diameter
8.036
Orbital period
1580.645494830646
Show 15 more facts
provisional designation
1999 TG32
time of discovery or invention
1999-10-04
orbital eccentricity
0.180982652158706
absolute magnitude
14.44
orbital inclination
4.22057979897536
periapsis
2.174955962991457
apoapsis
3.136179310819402
semi-major axis of an orbit
2.655567636905429
mean anomaly
264.487441069675
longitude of ascending node
205.9974029105987
argument of periapsis
299.9582992995392
albedo
0.045
time of periapsis
2461419.865266592
Sources (2)

via Wikidata · CC0