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
- Joel Hastings Metcalf
- Discovery site
- Taunton, Massachusetts
- Discovery date
- 16 February 1906
- Alternative designations
- 1906 TE
- Observation arc
- 110.14 yr (40230 d)
- Aphelion
- 3.8535 AU (576.48 Gm )
- Perihelion
- 2.3147 AU (346.27 Gm)
- Semi major axis
- 3.0841 AU (461.37 Gm)
- Orbital period sidereal
- 5.42 yr (1978.3 d )
- Mean anomaly
- 235.763 °
- Mean motion
- 0° 10 55.092 / day
- Inclination
- 15.107°
- Longitude of ascending node
- 331.497°
- Argument of perihelion
- 45.906°
- Mean radius
- 62.36 ± 1.1 km , 63.975 ± 1.43 km
- Mass
- (1.02 ± 0.05) × 10 kg
- Mean density
- 9.29 ± 0.76 g/cm
- Synodic rotation period
- 35.195 h (1.4665 d )
via Wikipedia infobox
~1 min read
Encyclopedic overview
602 Marianna is a minor planet orbiting the Sun.
References
Excerpted from Wikipedia’s “Q155798” article, available under the CC BY-SA 4.0 licence.