In the Vinony graph
Vinony's link graph records 10 inbound references to Q125890, and connects out to asteroid belt, Friedrich Karl Arnold Schwassmann and list of observatory codes.
Vinony files it under Astronomical objects discovered in 1900, Background asteroids and Discoveries by Friedrich Karl Arnold Schwassmann.
Vinony links it to 40 Wikipedia language editions.
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
- M. Wolf , F. Schwassmann
- Discovery site
- Heidelberg Obs.
- Discovery date
- 15 September 1900 ; 125 years ago ( 1900-09-15 )
- Pronunciation
- / æ l ə ˈ ɡ eɪ n i ə /
- Named after
- Allegheny, Pennsylvania , ( John Brashear optics)
- Alternative designations
- 1900 FJ · 1938 SA
- Minor planet category
- main-belt · (outer)
- Observation arc
- 115.57 yr (42213 d)
- Aphelion
- 3.6339 AU (543.62 Gm )
- Perihelion
- 2.5553 AU (382.27 Gm)
- Semi major axis
- 3.0946 AU (462.95 Gm)
- Orbital period sidereal
- 5.44 yr (1988.4 d )
- Mean anomaly
- 104.03 °
- Mean motion
- 0° 10 51.78 / day
- Inclination
- 12.919°
- Longitude of ascending node
- 249.70°
- Argument of perihelion
- 128.67°
- Earth moid
- 1.58071 AU (236.471 Gm)
via Wikipedia infobox
Wikidata facts
- Diameter
- 18.739
- Orbital period
- 1988.535722451689
Show 14 more facts
- provisional designation
- A900 RA
- time of discovery or invention
- 1900-09-15
- albedo
- 0.208
- rotation period
- 21.953
- absolute magnitude
- 11.1
- orbital eccentricity
- 0.1709029326978676
- semi-major axis of an orbit
- 3.094733909034542
- periapsis
- 2.565834808061003
- apoapsis
- 3.623633010008082
- orbital inclination
- 12.9750666981745
- longitude of ascending node
- 249.3916264955236
- argument of periapsis
- 131.1972134899966
- mean anomaly
- 356.2263821535188
- time of periapsis
- 2461021.3443719186
Sources (2)
via Wikidata · CC0
~2 min read
Encyclopedic overview
457 Alleghenia, provisional designation 1900 FJ, is a carbonaceous asteroid from the outer region of the asteroid belt, about 34 kilometers in diameter. It was discovered on 15 September 1900, by German astronomers Max Wolf and Friedrich Schwassmann at Heidelberg Observatory in southern Germany.
The C-type asteroid orbits the Sun at a distance of 2.6–3.6 AU once every 5 years and 5 months (1,987 days). Its orbit is tilted by 13 degrees to the plane of the ecliptic and shows an eccentricity of 0.17. Based on assumptions made by the Collaborative Asteroid Lightcurve Link, the body has a low albedo of 0.06, a typical value for a carbonaceous asteroid. In 2014, photometric light-curve observations at the Los Algarrobos Observatory (OLASU, I38), Uruguay, has given a rotation period of 21.953±0.001 hours with a brightness amplitude of 0.20 in magnitude. It was the last among the first 500 numbered asteroids to have its period measured for the first time (also see 398 Admete).
Excerpted from Wikipedia’s “Q125890” article, available under the CC BY-SA 4.0 licence.