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39791 Jameshesser

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Also known as (39791) 1997 PH4

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
Diameter
1.617
Orbital period
991.8010666578
Show 17 more facts
discoverer or inventor
David D. Balam
time of discovery or invention
1997-08-13
provisional designation
2000 QL117
site of astronomical discovery
National Research Council Canada
orbital eccentricity
0.1048944735006177
orbital inclination
23.61259158394655
periapsis
1.742174561106662
apoapsis
2.150493978032034
semi-major axis of an orbit
1.946334269569348
mean anomaly
52.55579255637775
longitude of ascending node
150.4859152607217
argument of periapsis
279.2234098031205
absolute magnitude
15.0
albedo
0.89
rotation period
4.829
time of periapsis
2460855.7086357875
Sources (3)

via Wikidata · CC0