514 Armida

Picture of the Day · NASA

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

Key facts

Discovered by

Max Wolf

Discovery site

Heidelberg

Discovery date

24 August 1903

Alternative designations

1903 MB

Adjectives

Armidian

Observation arc

112.50 yr (41092 d)

Aphelion

3.1722 AU (474.55 Gm )

Perihelion

2.9197 AU (436.78 Gm)

Semi major axis

3.0460 AU (455.68 Gm)

Orbital period sidereal

5.32 yr (1941.7 d )

Mean anomaly

52.051 °

Mean motion

0° 11 7.44 / day

Inclination

3.8766°

Longitude of ascending node

268.633°

Argument of perihelion

107.727°

Mean radius

53.085 ± 1.9 km

Synodic rotation period

21.851 h (0.9105 d )

Geometric albedo

0.0379 ± 0.003

via Wikipedia infobox

Wikidata facts

Diameter

120.093

Orbital period

1942.906391556934

via Wikidata · CC0