Q136212

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

K. Reinmuth

Discovery site

Heidelberg Obs.

Discovery date

11 January 1929

Named after

Carolina Otero , (Spanish courtesan)

Alternative designations

1929 AC · 1926 GD, 1948 RN 1 · 1949 YO

Minor planet category

main-belt · Flora

Observation arc

90.71 yr (33,133 days)

Aphelion

2.6052 AU

Perihelion

1.9394 AU

Semi major axis

2.2723 AU

Orbital period sidereal

3.43 yr (1,251 days)

Mean anomaly

291.09 °

Mean motion

0° 17 15.72 / day

Inclination

6.5045°

Longitude of ascending node

1.0892°

Argument of perihelion

136.08°

Dimensions

8.87 ± 1.56 km , 10.974 ± 0.892 km , 11.74 km (derived)

Synodic rotation period

3.648 ± 0.002 h , 3.648 08 ± 0.000 14 h

via Wikipedia infobox