664 Judith

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

24 June 1908

Pronunciation

/ ˈ dʒ uː d ɪ θ /

Alternative designations

1908 DH

Observation arc

107.74 yr (39352 d)

Aphelion

3.9310 AU (588.07 Gm )

Perihelion

2.4607 AU (368.12 Gm)

Semi major axis

3.1959 AU (478.10 Gm)

Orbital period sidereal

5.71 yr (2086.8 d )

Mean anomaly

28.142 °

Mean motion

0° 10 21.036 / day

Inclination

8.5782°

Longitude of ascending node

170.956°

Argument of perihelion

102.16°

Mean radius

36.34 ± 1.4 km

Synodic rotation period

13.764 h (0.5735 d )

Geometric albedo

0.0344 ± 0.003

via Wikipedia infobox

Wikidata facts

Instance of

asteroid

Followed by

665 Sabine

Follows

663 Gerlinde

Parent body

Sun

Minor-planet group

asteroid belt

Diameter

85.214

Orbital period

2069.903836034035

via Wikidata · CC0