375 Ursula

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

A. Charlois

Discovery site

Nice Obs.

Discovery date

18 September 1893

Pronunciation

/ ˈ ɜːr sj uː l ə /

Named after

unknown

Alternative designations

1893 AL

Minor planet category

main-belt · ( outer ) , Ursula

Adjectives

Ursulian / ɜːr ˈ sj uː l i ə n /

Observation arc

124.06 yr (45,314 days)

Aphelion

3.4544 AU

Perihelion

2.7928 AU

Semi major axis

3.1236 AU

Orbital period sidereal

5.52 yr (2,016 days)

Mean anomaly

189.03 °

Mean motion

0° 10 42.6 / day

Inclination

15.943°

Longitude of ascending node

336.57°

Argument of perihelion

342.15°

via Wikipedia infobox