Q138877

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

K. Reinmuth

Discovery site

Heidelberg Obs.

Discovery date

8 January 1937

Named after

Margret Braun , (wife of Heinrich Vogt )

Alternative designations

1937 AL · A924 RD

Minor planet category

main-belt · ( outer ) , Eos

Observation arc

80.73 yr (29,485 days)

Aphelion

3.3373 AU

Perihelion

2.7030 AU

Semi major axis

3.0202 AU

Orbital period sidereal

5.25 yr (1,917 days)

Mean anomaly

209.01 °

Mean motion

0° 11 16.08 / day

Inclination

10.352°

Longitude of ascending node

170.92°

Argument of perihelion

233.32°

Dimensions

21.083 ± 0.083 km

Geometric albedo

0.145 ± 0.014

via Wikipedia infobox