(21656) Knuth
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Asteroid (21656) Knuth |
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| Properties of the orbit ( animation ) | |
| Orbit type | Main belt asteroid |
| Major semi-axis | 2.7109 AU |
| eccentricity | 0.2243 |
| Perihelion - aphelion | 2.1029 AU - 3.3190 AU |
| Inclination of the orbit plane | 9.2503 ° |
| Sidereal period | 4.46 a |
| Mean orbital velocity | 18.09 km / s |
| Physical Properties | |
| Absolute brightness | 14.6 mag |
| history | |
| Explorer |
Petr Pravec Peter Kušnirák |
| Date of discovery | August 9, 1999 |
| Another name | 1999 PX 1 , 1990 SV 16 , 1998 HZ 140 |
| 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. | |
(21656) Knuth is an asteroid of the main belt that was discovered on August 9, 1999 by the Czech astronomer Petr Pravec and his Slovak colleague Peter Kušnirák at the Ondřejov observatory ( IAU code 557) in the Czech Republic.
The asteroid is named after the American professor of computer science Donald E. Knuth (* 1938) who wrote the standard work The Art of Computer Programming and from 1977 developed the TeX typesetting system.
See also
Web links
- Asteroid Knuth: Discovery Circumstances according to the Minor Planet Center of the International Astronomical Union at the Harvard-Smithsonian Center for Astrophysics, Cambridge, USA
- (21656) Knuth in the Small-Body Database of the Jet Propulsion Laboratory (English).
- (21656) Knuth in the database of the "Asteroids - Dynamic Site" (AstDyS-2, English).