(18243) Gunn
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Asteroid (18243) Gunn |
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| Properties of the orbit ( animation ) | |
| Orbit type | Inner main belt asteroid |
| Major semi-axis | 2.2428 AU |
| eccentricity | 0.0932 |
| Perihelion - aphelion | 2.0337 AU - 2.4519 AU |
| Inclination of the orbit plane | 6.8740 ° |
| Length of the ascending node | 5.1190 ° |
| Argument of the periapsis | 162.7684 ° |
| Time of passage of the perihelion | 3rd November 2018 |
| Sidereal period | 3.36 a |
| Mean orbital velocity | 19.89 km / s |
| Physical Properties | |
| Medium diameter | 4.857 km (± 0.069) |
| Albedo | 0.431 (± 0.081) |
| Absolute brightness | 13.4 mag |
| history | |
| Explorer |
Cornelis Johannes van Houten , Ingrid van Houten-Groeneveld , Tom Gehrels |
| Date of discovery | 29th September 1973 |
| Another name | 2272 T-2 , 1975 EJ |
| 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. | |
(18243) Gunn is an asteroid located in the inner main belt , which was discovered on September 30, 1973 by the Dutch astronomer couple Cornelis Johannes van Houten and Ingrid van Houten-Groeneveld . The discovery was made during the 2nd Trojan survey, during which Tom Gehrels surveyed field plates recorded with the 120 cm Oschin Schmidt telescope of the Palomar observatory at the University of Leiden , 13 years after the start of the Palomar-Leiden- Surveys .
The mean diameter of the asteroid was calculated to be 4.857 km (± 0.069). The albedo of 0.431 (± 0.081) indicates a light surface.
The Italian astronomer Vincenzo Zappalà defined in a publication from 1995 (et al.) That (18243) Gunn belonged to the Flora family, a large group of asteroids named after (8) Flora . Asteroids of this family move in a 4: 9 orbital resonance with the planet Mars around the sun . The group is also called the Ariadne family, after the asteroid (43) Ariadne .
(18243) Gunn was named on January 7, 2004 after the American astrophysicist James E. Gunn (* 1938).
Web links
- (18243) Gunn in the database of the "Asteroids - Dynamic Site" (AstDyS-2, English).
- (18243) Gunn 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 (18243) Gunn according to the Minor Planet Center of the International Astronomical Union at the Harvard-Smithsonian Center for Astrophysics in Cambridge , Massachusetts (English)