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EntityQ709775· pop 16

9003 Ralphmilliken

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Also known as (9003) 1981 UW21, Ralphmilliken

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
Followed by
Q709934
Parent body
Sun
Minor-planet group
asteroid belt
Diameter
15.124
Orbital period
1693.815946199661
Show 17 more facts
discoverer or inventor
Schelte J. Bus
site of astronomical discovery
Palomar Observatory
provisional designation
1995 US7
time of discovery or invention
1981-10-24
orbital eccentricity
0.0764293894838174
absolute magnitude
13.21
orbital inclination
5.341182688186105
periapsis
2.568317029298233
apoapsis
2.993395307699593
semi-major axis of an orbit
2.780856168498913
mean anomaly
181.7255898340751
longitude of ascending node
124.8099033316554
argument of periapsis
273.0589979418015
albedo
0.052
rotation period
13.3465
time of periapsis
2461839.2889964953
Sources (2)

via Wikidata · CC0