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11887 Echemmon

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Also known as (11887) Echemmon, (11887) 1990 TV12, Echemmon

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
Named after
Echemmon
Followed by
(11888) 1990 UD3
Parent body
Sun
Minor-planet group
Jupiter trojan
Diameter
31.19
Orbital period
4303.903882410289
Show 17 more facts
discoverer or inventor
Lutz D. Schmadel
site of astronomical discovery
Karl Schwarzschild Observatory
provisional designation
1990 TV12
time of discovery or invention
1990-10-14
orbital eccentricity
0.09255551343326819
mean anomaly
45.42399142375091
longitude of ascending node
242.6453299336082
argument of periapsis
112.6363406224906
absolute magnitude
10.85
orbital inclination
24.05245303746721
periapsis
4.698899512652888
apoapsis
5.657435408573921
semi-major axis of an orbit
5.178167460613404
albedo
0.095
rotation period
8.47
time of periapsis
2460457.4430748797
Sources (2)

via Wikidata · CC0