Q155319

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 date

18 July 1904

Pronunciation

German: [ fʁiːdəˈʁiːkə ]

Alternative designations

1904 OK

Minor planet category

Main belt ( Hygiea family )

Observation arc

111.70 yr (40800 d)

Aphelion

3.6924 AU (552.38 Gm )

Perihelion

2.6238 AU (392.51 Gm)

Semi major axis

3.1581 AU (472.45 Gm)

Orbital period sidereal

5.61 yr (2049.9 d )

Mean anomaly

275.237 °

Mean motion

0° 10 32.232 / day

Inclination

6.5204°

Longitude of ascending node

141.173°

Argument of perihelion

227.779°

Mean radius

36.245 ± 1.15 km , 36 km

Mean density

~1.4 g/cm

Synodic rotation period

1.1 d , 46.728 h (1.9470 d )

via Wikipedia infobox

Wikidata facts

Diameter

70.64

Orbital period

2046.139268162836

via Wikidata · CC0