642 Clara

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

Max Wolf

Discovery site

Heidelberg

Discovery date

8 September 1907

Alternative designations

1907 ZY

Observation arc

108.42 yr (39599 d)

Aphelion

3.5799 AU (535.55 Gm )

Perihelion

2.8028 AU (419.29 Gm)

Semi major axis

3.1914 AU (477.43 Gm)

Orbital period sidereal

5.70 yr (2082.4 d )

Mean anomaly

307.116 °

Mean motion

0° 10 22.368 / day

Inclination

8.1702°

Longitude of ascending node

5.9035°

Argument of perihelion

118.101°

Mean radius

16.68 ± 0.75 km

Synodic rotation period

8.2308 h (0.34295 d )

Geometric albedo

0.1617 ± 0.015

via Wikipedia infobox

Wikidata facts

Instance of

asteroid

Followed by

643 Scheherezade

Follows

641 Agnes

Parent body

Sun

Minor-planet group

asteroid belt

Diameter

33.36

Orbital period

2077.811863817522

via Wikidata · CC0