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17831 Ussery

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Also known as Ussery

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
17832 Pitman
Parent body
Sun
Minor-planet group
asteroid belt
Diameter
4.2
Orbital period
1602.43151538741
Show 15 more facts
provisional designation
1999 NP16
time of discovery or invention
1998-04-20
orbital eccentricity
0.05996687034752118
absolute magnitude
14.3
orbital inclination
2.390511079978057
periapsis
2.519207034425341
apoapsis
2.840619029059608
semi-major axis of an orbit
2.679913031742475
mean anomaly
223.3709353451846
longitude of ascending node
129.949629159664
argument of periapsis
306.2688322409941
albedo
0.251
time of periapsis
2461608.6631086688
Sources (2)

via Wikidata · CC0