Q826623

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

L. Kohoutek

Discovery site

Bergedorf Obs.

Discovery date

26 October 1971

Named after

Tadeáš Hájek (astronomer)

Alternative designations

1971 UP 1 · 1941 EA

Minor planet category

main-belt · ( middle )

Observation arc

76.21 yr (27,836 days)

Aphelion

2.6677 AU

Perihelion

2.3911 AU

Semi major axis

2.5294 AU

Orbital period sidereal

4.02 yr (1,469 days)

Mean anomaly

6.1573 °

Mean motion

0° 14 42 / day

Inclination

10.825°

Longitude of ascending node

47.232°

Argument of perihelion

134.65°

Dimensions

6.50 km (calculated) , 12.683 ± 0.288 km , 14.45 ± 2.58 km , 15.29 ± 1.04 km

Synodic rotation period

10 h

via Wikipedia infobox

Wikidata facts

Diameter

12.683

Orbital period

1468.987072740668

via Wikidata · CC0