Q155588

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

Paul Götz

Discovery site

Heidelberg

Discovery date

9 May 1905

Pronunciation

German: [ ˈduːduː ]

Alternative designations

1905 QM

Observation arc

101.79 yr (37178 d)

Aphelion

3.5071 AU (524.65 Gm )

Perihelion

1.9857 AU (297.06 Gm)

Semi major axis

2.7464 AU (410.86 Gm)

Orbital period sidereal

4.55 yr (1662.4 d )

Mean anomaly

106.652 °

Mean motion

0° 12 59.58 / day

Inclination

17.990°

Longitude of ascending node

70.761°

Argument of perihelion

215.026°

Mean radius

24.785 ± 2.45 km

Synodic rotation period

8.882 h (0.3701 d )

Geometric albedo

0.0484 ± 0.011

via Wikipedia infobox