File:35Leukothea_(Lightcurve_Inversion).png · Wikimedia Commons · See Wikimedia Commons
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
- R. Luther
- Discovery date
- 19 April 1855
- Designation
- (35) Leukothea
- Pronunciation
- / lj uː ˈ k ɒ θ i ə /
- Named after
- Λευκοθέα Leykothea
- Alternative names
- 1948 DC; 1950 RS 1 ; 1976 WH
- Minor planet category
- Main belt
- Adjectives
- Leukothean / lj uː ˈ k ɒ θ i ə n /
- Symbol
- (historical)
- Aphelion
- 3.659 AU
- Perihelion
- 2.353 AU
- Semi major axis
- 3.006 AU
- Orbital period sidereal
- 5.211 yr (1903.34 d)
- Average orbital speed
- 17.00 km/s
- Mean anomaly
- 309.117°
- Inclination
- 7.866°
- Longitude of ascending node
- 352.910°
- Argument of perihelion
- 215.440°
via Wikipedia infobox
Wikidata facts
- Instance of
- asteroid
- Named after
- Leucothea
- Followed by
- 36 Atalante
- Follows
- 34 Circe
- Parent body
- Sun
- Minor-planet group
- asteroid belt
- Diameter
- 103.055
- Orbital period
- 1903.340924153616
- Image
- 35Leukothea (Lightcurve Inversion).png
Show 19 more facts
- discoverer or inventor
- Robert Luther
- site of astronomical discovery
- Düsseldorf-Bilk Observatory
- provisional designation
- 1976 WH
- time of discovery or invention
- 1855-04-19
- asteroid spectral type
- C-type asteroid
- orbital inclination
- 7.866069069371177
- albedo
- 0.066
- Commons category
- 35 Leukothea
- rotation period
- 31.9
- absolute magnitude
- 8.68
- orbital eccentricity
- 0.2172633083137125
- semi-major axis of an orbit
- 3.005698669829507
- periapsis
- 2.352670633028223
- apoapsis
- 3.65872670663079
- longitude of ascending node
- 352.9095545520451
- argument of periapsis
- 215.4399695210549
- mean anomaly
- 309.11719876877
- time of periapsis
- 2461269.5203275527
- epoch
- November 21, 2025
via Wikidata · CC0
~1 min read
Encyclopedic overview
35 Leukothea is a large, dark asteroid from the asteroid belt. It was discovered by German astronomer Karl Theodor Robert Luther on 19 April 1855, and named after Leukothea, a sea goddess in Greek mythology. Its historical symbol was a pharos (ancient lighthouse); it was encoded in Unicode 17.0 as U+1CED0 ().
Leukothea is a C-type asteroid in the Tholen classification system, suggesting a carbonaceous composition. It is orbiting the Sun with a period of 5.17 years and has a cross-sectional size of 103.1 km.
Excerpted from Wikipedia’s “35 Leukothea” article, available under the CC BY-SA 4.0 licence.