Q155889

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

August Kopff

Discovery site

Heidelberg

Discovery date

11 October 1906

Alternative designations

1906 VQ

Observation arc

109.50 yr (39996 d)

Aphelion

2.9930 AU (447.75 Gm )

Perihelion

2.3942 AU (358.17 Gm)

Semi major axis

2.6936 AU (402.96 Gm)

Orbital period sidereal

4.42 yr (1614.7 d )

Mean anomaly

267.21 °

Mean motion

0° 13 22.62 / day

Inclination

7.0266°

Longitude of ascending node

217.291°

Argument of perihelion

208.792°

Mean radius

12.905 ± 0.75 km

Synodic rotation period

4.572 h (0.1905 d )

Geometric albedo

0.1056 ± 0.013

via Wikipedia infobox

Wikidata facts

Diameter

29.191

Orbital period

1614.901844713036

Image

614Pia (Lightcurve Inversion).png

via Wikidata · CC0