252 Clementina

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

J. Perrotin

Discovery date

11 October 1885

Alternative designations

A885 TB

Minor planet category

Main belt

Observation arc

130.51 yr (47667 d)

Aphelion

3.3790 AU (505.49 Gm )

Perihelion

2.93952 AU (439.746 Gm)

Semi major axis

3.15924 AU (472.616 Gm)

Orbital period sidereal

5.62 yr (2051.0 d )

Average orbital speed

16.77 km/s

Mean anomaly

131.151 °

Mean motion

0° 10 31.876 / day

Inclination

10.044°

Longitude of ascending node

202.043°

Argument of perihelion

155.886°

Dimensions

69.29 ± 4.4 km

Synodic rotation period

10.864 h (0.4527 d )

Geometric albedo

0.0843 ± 0.012

via Wikipedia infobox

Wikidata facts

Instance of

asteroid

Followed by

Q149417

Follows

251 Sophia

Parent body

Sun

Minor-planet group

asteroid belt

Diameter

65.344

Orbital period

2051.944468242204

via Wikidata · CC0