Q1047773

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

N. Chernykh

Discovery site

Crimean Astrophysical Obs.

Discovery date

1 September 1978

Named after

Astrid Lindgren , (Swedish writer)

Alternative designations

1978 RH · 1980 CQ, 1980 DM

Minor planet category

main-belt · ( outer ) , background

Observation arc

39.06 yr (14,266 d)

Aphelion

4.0411 AU

Perihelion

2.2764 AU

Semi major axis

3.1588 AU

Orbital period sidereal

5.61 yr (2,051 d)

Mean anomaly

327.09 °

Mean motion

0° 10 32.16 / day

Inclination

2.0630°

Longitude of ascending node

108.70°

Argument of perihelion

298.30°

Mean diameter

18.95 ± 0.80 km , 19.596 ± 0.248 km , 20.2 ± 2.0 km , 20.21 km (calculated) , 21 ± 2 km

Synodic rotation period

5.614 ± 0.0047 h , 5.618 ± 0.0047 h

via Wikipedia infobox