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2735 Ellen

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Also known as Ellen

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
2736 Ops
Parent body
Sun
Diameter
3.529
Orbital period
924.2424136514027
Show 18 more facts
discoverer or inventor
Tod R. Lauer
site of astronomical discovery
Palomar Observatory
provisional designation
1977 RB
time of discovery or invention
1977-09-13
orbital eccentricity
0.05471395516762177
argument of periapsis
59.67485047993683
absolute magnitude
14.48
orbital inclination
23.05251793348561
mean anomaly
332.5751678235214
longitude of ascending node
344.5397525224798
periapsis
1.755314302695548
apoapsis
1.958512453324757
semi-major axis of an orbit
1.856913378010153
albedo
0.292
rotation period
159.0
asteroid spectral type
S-type asteroid
time of periapsis
2461070.90886968
Sources (2)

via Wikidata · CC0