(9491) Thooft
Asteroid (9491) Thooft |
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Properties of the orbit ( animation ) | |
Orbit type | Main belt asteroid |
Major semi-axis | 2.2155 AU |
eccentricity | 0.1329 |
Perihelion - aphelion | 1.9210 AU - 2.5100 AU |
Inclination of the orbit plane | 5.0488 ° |
Sidereal period | 3.30 a |
Mean orbital velocity | 20.01 km / s |
Physical Properties | |
Absolute brightness | 15.3 mag |
history | |
Explorer |
C. J. v. Houten , I. v. Houten-Groeneveld T. Gehrels |
Date of discovery | March 25, 1971 |
Another name | 1205 T-1, 1997 CR 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. |
(9491) Thooft is an asteroid of the main belt . It was discovered on March 25, 1971 by the Dutch astronomers Cornelis Johannes van Houten , Ingrid van Houten-Groeneveld and Tom Gehrels at the Palomar Observatory ( observatory code 675) in California .
The asteroid is named after the Dutch physicist Gerardus' t Hooft (* 1946), who, together with his colleague Martinus JG Veltman, was awarded the Nobel Prize in Physics in 1999.
In 2000, 't Hooft wrote a humorous make-up for "his" asteroid. It is u. a. Prohibited all visitors to the asteroid from using an apostrophe . He justifies this with the fact that the International Astronomical Union also omitted the apostrophe in the name of the physicist when naming the asteroid.
See also
Web links
- Asteroid Thooft: Discovery Circumstances according to the Minor Planet Center of the International Astronomical Union at the Harvard-Smithsonian Center for Astrophysics, Cambridge, USA
- Asteroid Thooft in the Small-Body Database of NASA's Jet Propulsion Laboratory at the California Institute of Technology, Pasadena, USA
- (9491) Thooft in the database of the "Asteroids - Dynamic Site" (AstDyS-2, English).
Individual evidence
- ↑ 9491 Thooft CONSTITUTION and bylaws . Phys.uu.nl. Retrieved June 28, 2012.