(9687) Uhlenbeck
Asteroid (9687) Uhlenbeck |
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Properties of the orbit ( animation ) | |
Orbit type | Main belt asteroid |
Major semi-axis | 2.8153 AU |
eccentricity | 0.0083 |
Perihelion - aphelion | 2.7920 AU - 2.8386 AU |
Inclination of the orbit plane | 6.0534 ° |
Length of the ascending node | 15.6611 ° |
Argument of the periapsis | 75.2711 ° |
Sidereal period | 4.72 a |
Mean orbital velocity | 17.75 km / s |
Physical Properties | |
Medium diameter | 5.380 (± 0.436) km |
Albedo | 0.222 (± 0.034) |
Absolute brightness | 13.7 mag |
history | |
Explorer |
Cornelis Johannes van Houten , Ingrid van Houten-Groeneveld , Tom Gehrels |
Date of discovery | September 24, 1960 |
Another name | 4614 PL , 1951 AL 3 , 1991 FE 4 |
Source: Unless otherwise stated, the data comes from JPL Small-Body Database Browser . The affiliation to an asteroid family is automatically determined from the AstDyS-2 database . Please also note the note on asteroid items. |
(9687) Uhlenbeck is an asteroid of the main belt that was discovered on September 24, 1960 by the Dutch astronomer couple Cornelis Johannes van Houten and Ingrid van Houten-Groeneveld . The discovery came about as part of the Palomar-Leiden survey , during which Tom Gehrels examined field plates recorded at the University of Leiden with the 120 cm Oschin Schmidt telescope of the Palomar observatory .
The asteroid was named on July 5, 2001 after the American physicist of Dutch origin George Eugene Uhlenbeck (1900–1988), who, together with Samuel Abraham Goudsmit, postulated the existence of the electron spin in 1925 .
See also
Web links
- (9687) Uhlenbeck in the database of the "Asteroids - Dynamic Site" (AstDyS-2, English).
- (9687) Uhlenbeck in the Small-Body Database of the Jet Propulsion Laboratory of NASA at the California Institute of Technology (Caltech) in Pasadena , California (English)
- Discovery Circumstances by (9687) Uhlenbeck according to the Minor Planet Center of the International Astronomical Union at the Harvard-Smithsonian Center for Astrophysics in Cambridge , Massachusetts (English)