Q152742

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

Auguste Charlois

Discovery date

16 January 1896

Pronunciation

/ l ɪ ˈ r aɪ ə p iː /

Named after

Līriopē

Alternative designations

1896 CN

Minor planet category

Main belt

Observation arc

108.45 yr (39611 d)

Aphelion

3.75820 AU (562.219 Gm )

Perihelion

3.25061 AU (486.284 Gm)

Semi major axis

3.50440 AU (524.251 Gm)

Orbital period sidereal

6.56 yr (2396.2 d )

Mean anomaly

179.805 °

Mean motion

0° 9 0.86 / day

Inclination

9.55837°

Longitude of ascending node

110.586°

Argument of perihelion

319.612°

Dimensions

69.89 ± 2.9 km

Synodic rotation period

7.353 h (0.3064 d )

via Wikipedia infobox