Q137169

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

Christian Heinrich Friedrich Peters

Discovery date

31 July 1872

Pronunciation

/ ˈ b r uː n h ɪ l d /

Named after

Brynhildr

Alternative designations

A872 OB

Minor planet category

Main belt

Observation arc

143.71 yr (52490 days)

Aphelion

3.0183 AU (451.53 Gm )

Perihelion

2.37594 AU (355.436 Gm)

Semi major axis

2.69710 AU (403.480 Gm)

Orbital period sidereal

4.43 yr (1617.9 d )

Average orbital speed

18.08 km/s

Mean anomaly

96.8286 °

Mean motion

0° 13 21.054 / day

Inclination

6.4142°

Longitude of ascending node

307.834°

Argument of perihelion

125.960°

Earth moid

1.39621 AU (208.870 Gm)

via Wikipedia infobox

Wikidata facts

Diameter

45.209

Mass

120

Orbital period

1615.837214216856

via Wikidata · CC0