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21602 Ialmenus

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Also known as (21602) Ialmenus, Ialmenus

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
Follows
21601 Aias
Parent body
Sun
Diameter
16.353
Orbital period
4358.94761463098
Show 16 more facts
discoverer or inventor
Kleť Observatory
site of astronomical discovery
Kleť Observatory
provisional designation
1998 YW1
time of discovery or invention
1998-12-17
orbital eccentricity
0.06215859097418324
orbital inclination
7.934693150332688
periapsis
4.897617751725365
apoapsis
5.546829901343757
semi-major axis of an orbit
5.22222382653456
mean anomaly
31.8965386521221
longitude of ascending node
309.3236524103608
argument of periapsis
193.9040046059383
absolute magnitude
12.23
albedo
0.151
time of periapsis
2460614.2907192428
Sources (3)

via Wikidata · CC0