Q158061

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

10 March 1920

Named after

Name picked from the almanac , Lahrer Hinkender Bote

Alternative designations

A920 ED · 1920 GR

Minor planet category

main-belt · ( inner ) Flora · Bg

Observation arc

99.82 yr (36,460 d)

Aphelion

2.4921 AU

Perihelion

1.9859 AU

Semi major axis

2.2390 AU

Orbital period sidereal

3.35 yr (1,224 d)

Mean anomaly

249.25 °

Mean motion

0° 17 39.12 / day

Inclination

3.9128°

Longitude of ascending node

231.38°

Argument of perihelion

22.990°

Mean diameter

10.70 ± 0.36 km 11.443 ± 0.190 km

Synodic rotation period

3.310 16 ± 0.000 09 h

via Wikipedia infobox