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18016 Grondahl

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Also known as (18016 Grondahl), Grondahl

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
6.999
Orbital period
1347.354288760817
Show 15 more facts
provisional designation
1999 JU122
time of discovery or invention
1999-05-13
orbital eccentricity
0.07095235134558821
absolute magnitude
14.22
orbital inclination
6.749561833659285
periapsis
2.217993368440897
apoapsis
2.556774366353616
semi-major axis of an orbit
2.387383867397256
mean anomaly
56.27585736806404
longitude of ascending node
232.0744234817833
argument of periapsis
27.59958378505762
albedo
0.077
time of periapsis
2460789.8791172816
Sources (2)

via Wikidata · CC0