343 Ostara

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

Max Wolf

Discovery site

Heidelberg Obs.

Discovery date

15 November 1892

Named after

Ēostre

Alternative designations

1892 N · A892 VA

Minor planet category

Main belt

Observation arc

123.10 yr (44961 d)

Aphelion

2.96385 AU (443.386 Gm )

Perihelion

1.85989 AU (278.236 Gm)

Semi major axis

2.41187 AU (360.811 Gm)

Orbital period sidereal

3.75 yr (1368.1 d )

Mean anomaly

16.5913 °

Mean motion

0° 15 47.275 / day

Inclination

3.26504°

Longitude of ascending node

38.6320°

Argument of perihelion

9.62726°

Mean diameter

19.10 ± 1.3 km

Synodic rotation period

109.87 h (4.578 d )

via Wikipedia infobox

Wikidata facts

Instance of

asteroid

Named after

Ēostre

Followed by

344 Desiderata

Follows

342 Endymion

Parent body

Sun

Minor-planet group

asteroid belt

Diameter

18.213

Orbital period

1367.945973643384

Image

000343-asteroid shape model (343) Ostara.png

via Wikidata · CC0