Q151864

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

8 March 1893

Pronunciation

/ æ p ə ˈ l oʊ n i ə /

Named after

Possibly Apollonia (Illyria)

Alternative designations

1893 K

Minor planet category

Main belt

Observation arc

118.08 yr (43129 d)

Aphelion

3.31497 AU (495.912 Gm )

Perihelion

2.43597 AU (364.416 Gm)

Semi major axis

2.87547 AU (430.164 Gm)

Orbital period sidereal

4.88 yr (1781.0 d )

Mean anomaly

179.300 °

Mean motion

0° 12 7.682 / day

Inclination

3.55411°

Longitude of ascending node

172.161°

Argument of perihelion

253.343°

Dimensions

89.45 ± 2.7 km

Synodic rotation period

50.6 h (2.11 d )

via Wikipedia infobox

Wikidata facts

Diameter

90.116

Orbital period

1782.432094267265

via Wikidata · CC0