Q156668

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 Obs.

Discovery date

22 December 1910

Alternative designations

1910 LD

Observation arc

104.80 yr (38277 d)

Aphelion

2.4175 AU (361.65 Gm )

Perihelion

1.9433 AU (290.71 Gm)

Semi major axis

2.1804 AU (326.18 Gm)

Orbital period sidereal

3.22 yr (1176.0 d )

Mean anomaly

355.232 °

Mean motion

0° 18 22.068 / day

Inclination

4.2706°

Longitude of ascending node

281.961°

Argument of perihelion

90.548°

Synodic rotation period

414 h (17.3 d )

via Wikipedia infobox