Q157312

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

Johann Palisa

Discovery site

University of Vienna

Discovery date

29 August 1916

Pronunciation

/ l ɪ n d ə ˈ m æ m i ə /

Alternative designations

1916 ZX

Observation arc

110.46 yr (40346 d)

Aphelion

3.2885 AU (491.95 Gm )

Perihelion

3.1028 AU (464.17 Gm)

Semi major axis

3.1956 AU (478.05 Gm)

Orbital period sidereal

5.71 yr (2086.6 d )

Mean anomaly

256.3941 °

Mean motion

0° 10 21.108 / day

Inclination

1.1286°

Longitude of ascending node

1.9327°

Argument of perihelion

289.9690°

Earth moid

2.08656 AU (312.145 Gm)

Jupiter moid

1.76068 AU (263.394 Gm)

Mean radius

26.695 ± 0.75 km

via Wikipedia infobox

Wikidata facts

Diameter

47.891

Orbital period

2081.024760580017

via Wikidata · CC0