
File:Cybele_ZIMPOL.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
- E. W. Tempel
- Discovery site
- Marseille Obs.
- Discovery date
- 8 March 1861
- Pronunciation
- / ˈ s ɪ b ə l iː /
- Named after
- Cybele , (Hellenistic deity)
- Alternative designations
- 1949 YQ
- Minor planet category
- main belt · ( outer ) , Cybele
- Adjectives
- Cybelean / ˌ s ɪ b ə ˈ l iː ə n / , rarely Cybelian / s ɪ ˈ b ɛ l i ə n /
- Observation arc
- 155.98 yr (56,971 d )
- Aphelion
- 3.8102 AU
- Perihelion
- 3.0464 AU
- Semi major axis
- 3.4283 AU
- Orbital period sidereal
- 6.35 yr (2,319 days)
- Mean anomaly
- 168.06 °
- Mean motion
- 0° 9 19.08 / day
- Inclination
- 3.5627°
- Longitude of ascending node
- 155.63°
- Argument of perihelion
- 102.37°
via Wikipedia infobox
Wikidata facts
- Instance of
- asteroid
- Named after
- Cybele
- Followed by
- 66 Maja
- Follows
- 64 Angelina
- Parent body
- Sun
- Diameter
- 237.26
- Orbital period
- 2297.651769014972
- Image
- 000065-asteroid shape model (65) Cybele.png
Show 19 more facts
- discoverer or inventor
- Wilhelm Tempel
- site of astronomical discovery
- Marseille Observatory
- provisional designation
- A861 EB
- time of discovery or invention
- 1861-03-08
- asteroid spectral type
- X-type asteroid
- orbital inclination
- 3.564948573675304
- albedo
- 0.0706
- Commons category
- 65 Cybele
- rotation period
- 6.0814
- absolute magnitude
- 6.83
- orbital eccentricity
- 0.1277298484584262
- semi-major axis of an orbit
- 3.407667304299327
- periapsis
- 2.97240647592444
- apoapsis
- 3.842928132674213
- longitude of ascending node
- 155.0988086609751
- argument of periapsis
- 104.1394103311971
- mean anomaly
- 272.6326811906559
- time of periapsis
- 2461558.1102072676
- epoch
- November 21, 2025
Sources (2)
via Wikidata · CC0
~5 min read
Encyclopedic overview
65 Cybele is one of the largest asteroids in the Solar System. It is located in the outer asteroid belt. It is thought to be a remnant primordial body. It gives its name to the Cybele group of asteroids that orbit outward from the Sun from the 2:1 orbital resonance with Jupiter. The X-type asteroid has a relatively short rotation period of 6.0814 hours. It was discovered by Wilhelm Tempel in 1861, and named after Cybele, the earth goddess.
Discovery and naming
Excerpted from Wikipedia’s “65 Cybele” article, available under the CC BY-SA 4.0 licence.