Q155572

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

M. F. Wolf

Discovery site

Heidelberg

Discovery date

26 March 1905

Pronunciation

German: [ ˈɪŋvɛldə ]

Alternative designations

1905 QG

Observation arc

110.90 yr (40505 d)

Aphelion

3.5428 AU (530.00 Gm )

Perihelion

2.8069 AU (419.91 Gm)

Semi major axis

3.1748 AU (474.94 Gm)

Orbital period sidereal

5.66 yr (2066.2 d )

Mean anomaly

326.466 °

Mean motion

0° 10 27.228 / day

Inclination

1.5440°

Longitude of ascending node

159.502°

Argument of perihelion

315.780°

Mean radius

12.25 ± 0.8 km

Synodic rotation period

12.012 h (0.5005 d )

Geometric albedo

0.0966 ± 0.014

via Wikipedia infobox

Wikidata facts

Diameter

31.562

Orbital period

2062.40971550239

via Wikidata · CC0