File:242Kriemhild_(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
- Johann Palisa
- Discovery date
- 22 September 1884
- Pronunciation
- German: [ ˈkʁiːmhɪlt ]
- Named after
- Kriemhild
- Alternative designations
- A884 SA
- Minor planet category
- Main belt
- Observation arc
- 131.23 yr (47931 d)
- Aphelion
- 3.2036 AU (479.25 Gm )
- Perihelion
- 2.52045 AU (377.054 Gm)
- Semi major axis
- 2.86202 AU (428.152 Gm)
- Orbital period sidereal
- 4.84 yr (1768.5 d )
- Average orbital speed
- 17.6 km/s
- Mean anomaly
- 351.010 °
- Mean motion
- 0° 12 12.823 / day
- Inclination
- 11.351°
- Longitude of ascending node
- 206.940°
- Argument of perihelion
- 279.764°
- Dimensions
- 38.90 ± 2.1 km
via Wikipedia infobox
Wikidata facts
- Instance of
- asteroid
- Named after
- Gudrun
- Followed by
- 243 Ida
- Follows
- 241 Germania
- Parent body
- Sun
- Minor-planet group
- asteroid belt
- Diameter
- 40.802
- Orbital period
- 1768.343521095636
- Image
- 242Kriemhild (Lightcurve Inversion).png
Show 19 more facts
- discoverer or inventor
- Johann Palisa
- site of astronomical discovery
- Vienna Observatory
- time of discovery or invention
- 1884-09-22
- orbital inclination
- 11.34917449808156
- Commons category
- 242 Kriemhild
- provisional designation
- A884 SA
- albedo
- 0.222
- rotation period
- 4.5478
- asteroid spectral type
- X-type asteroid
- absolute magnitude
- 9.53
- orbital eccentricity
- 0.1229356333601983
- semi-major axis of an orbit
- 2.861840810145286
- periapsis
- 2.510018597574012
- apoapsis
- 3.21366302271656
- longitude of ascending node
- 206.8765669296344
- argument of periapsis
- 278.5926412613979
- mean anomaly
- 324.4394177019595
- time of periapsis
- 2461175.1759036477
- epoch
- November 21, 2025
Sources (2)
via Wikidata · CC0
~1 min read
Encyclopedic overview
242 Kriemhild is a main belt asteroid that was discovered by Austrian astronomer Johann Palisa on 22 September 1884 in Vienna and was named after Kriemhild, a mythological Germanic princess, by Moriz von Kuffner, a Viennese industrialist and sponsor of astronomy.
Photometric observations of this asteroid at the Oakley Observatory in Terre Haute, Indiana, during 2006 gave a light curve with a period of 4.558 ± 0.003 hours and a brightness variation of 0.15 ± 0.02 in magnitude.
Excerpted from Wikipedia’s “242 Kriemhild” article, available under the CC BY-SA 4.0 licence.