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8625 Simonhelberg

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Also known as (8625) 1981 EX15

main-belt minor planet

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
Named after
Simon Helberg
Parent body
Sun
Minor-planet group
asteroid belt
Diameter
3.694
Orbital period
1535.335757689297
Show 17 more facts
discoverer or inventor
Schelte J. Bus
site of astronomical discovery
Siding Spring Observatory
provisional designation
1978 NH5
time of discovery or invention
1981-03-01
orbital eccentricity
0.07929697858959173
absolute magnitude
14.67
orbital inclination
3.630618128220021
periapsis
2.398038733174837
apoapsis
2.811108358579734
semi-major axis of an orbit
2.604573545877285
mean anomaly
19.18700170522442
longitude of ascending node
326.4328295852339
argument of periapsis
58.48798247054435
albedo
0.247
rotation period
5.27
time of periapsis
2460918.670861664
Sources (2)

via Wikidata · CC0