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21645 Chentsaiwei

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Also known as Chentsaiwei, (21645) Chentsaiwei

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
4.013
Orbital period
1483.343922417422
Show 15 more facts
provisional designation
1999 NZ50
time of discovery or invention
1999-07-14
orbital eccentricity
0.2156292777767339
orbital inclination
11.60422104672625
periapsis
1.99656595377125
apoapsis
3.094307270339071
semi-major axis of an orbit
2.54543661205516
mean anomaly
138.8837425553481
longitude of ascending node
289.8079944312591
argument of periapsis
62.4692410031645
absolute magnitude
14.33
albedo
0.275
time of periapsis
2460428.2434571055
Sources (2)

via Wikidata · CC0