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15899 Silvain

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Also known as Silvain

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
(15900) 1997 RK3
Parent body
Sun
Minor-planet group
asteroid belt
Diameter
2.544
Orbital period
1191.523667503249
Show 15 more facts
discoverer or inventor
Pierre Antonini
provisional designation
1997 RR1
time of discovery or invention
1997-09-03
orbital eccentricity
0.08834771089978732
orbital inclination
2.326715136893994
periapsis
2.005235529745584
apoapsis
2.393888025847572
semi-major axis of an orbit
2.199561777796578
mean anomaly
266.013374264494
longitude of ascending node
66.89944639530512
argument of periapsis
243.4802523154456
absolute magnitude
15.52
albedo
0.207
time of periapsis
2461311.5758027574
Sources (2)

via Wikidata · CC0