521 Brixia

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

Raymond Smith Dugan

Discovery site

Heidelberg

Discovery date

10 January 1904

Pronunciation

/ ˈ b r ɪ k s i ə /

Alternative designations

1904 NB

Observation arc

112.27 yr (41005 d)

Aphelion

3.5139 AU (525.67 Gm )

Perihelion

1.9657 AU (294.06 Gm)

Semi major axis

2.7398 AU (409.87 Gm)

Orbital period sidereal

4.54 yr (1656.4 d )

Mean anomaly

308.887 °

Mean motion

0° 13 2.388 / day

Inclination

10.596°

Longitude of ascending node

89.665°

Argument of perihelion

316.010°

Mean radius

57.825 ± 1 km

Synodic rotation period

28.479 h (1.1866 d )

Geometric albedo

0.0626 ± 0.002

via Wikipedia infobox

Wikidata facts

Diameter

107.227

Orbital period

1659.570349071013

via Wikidata · CC0