Q151056

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

A. Borrelly

Discovery site

Marseille Obs.

Discovery date

27 November 1891

Pronunciation

/ ˈ f iː oʊ /

Named after

Φαιώ Phaiō , (Greek mythology)

Minor planet category

main-belt · ( middle ) , Phaeo

Adjectives

Phaeoian / f iː ˈ oʊ . i ə n /

Observation arc

126.48 yr (46,198 d)

Aphelion

3.4656 AU

Perihelion

2.0960 AU

Semi major axis

2.7808 AU

Orbital period sidereal

4.64 yr (1,694 d)

Mean anomaly

110.49 °

Mean motion

0° 12 45 / day

Inclination

8.0544°

Longitude of ascending node

252.36°

Argument of perihelion

115.00°

Mean diameter

69.855 ± 0.320 km , 71.88 ± 4.32 km

via Wikipedia infobox