(4772) Frankdrake
|
Asteroid (4772) Frankdrake |
|
|---|---|
| Properties of the orbit ( animation ) | |
| Orbit type | Main outer belt asteroid |
| Major semi-axis | 3.1620 AU |
| eccentricity | 0.0689 |
| Perihelion - aphelion | 2.9442 AU - 3.3798 AU |
| Inclination of the orbit plane | 11.5129 ° |
| Length of the ascending node | 209.8823 ° |
| Argument of the periapsis | 185.6799 ° |
| Time of passage of the perihelion | 7th November 2017 |
| Sidereal period | 5.62 a |
| Physical Properties | |
| Medium diameter | 27.570 km (± 0.268) |
| Albedo | 0.040 (± 0.008) |
| Absolute brightness | 11.9 likes |
| history | |
| Explorer | Tsutomu Hioki , Nobuhiro Kawasato |
| Date of discovery | November 2nd 1989 |
| Another name | 1989 VM , 1971 QD 1 , 1980 DH, 1986 GL 2 |
| 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. | |
(4772) Frankdrake is a main outer belt asteroid discovered on November 2, 1989 by Japanese astronomer Tsutomu Hioki and Japanese amateur astronomer Nobuhiro Kawasato at the Okutama Observatory ( IAU code 877) in western Tokyo Prefecture . The asteroid had already been sighted: on August 19, 1971 under the provisional designation 1971 QD 1 at the Crimean Observatory in Nautschnyj , in February 1980 (1980 DH) at the Kleť Observatory near Český Krumlov and on April 4, 1986 (1986 GL 2 ) again at the Crimean Observatory in Nautschnyj.
The mean diameter of the asteroid was determined to be 27.570 km (± 0.268). With an albedo of 0.040 (± 0.008) it has a very dark surface.
Mean distance from the Sun ( major semiaxis ), eccentricity and inclination of the orbit plane of the asteroid roughly correspond to the Eos family , a group of asteroids that typically have large semiaxes of 2.95 to 3.1 AU , bounded inward by the Kirkwood gap of 7: 3-resonance with Jupiter , as well as orbital inclinations between 8 ° and 12 °. The group is named after the asteroid (221) Eos . The family is believed to have emerged from a collision more than a billion years ago.
(4772) Frankdrake was named on January 5, 2015 after the American astronomer Frank Drake (* 1930), the organizer of the first SETI conference and developer of the Drake equation .
See also
Web links
- (4772) Frankdrake in the database of the "Asteroids - Dynamic Site" (AstDyS-2, English).
- (4772) Frankdrake in the Small-Body Database of the Jet Propulsion Laboratory (English).
- Discovery Circumstances by (4772) Frankdrake according to the Minor Planet Center of the International Astronomical Union at the Harvard-Smithsonian Center for Astrophysics in Cambridge , Massachusetts (English)
Individual evidence
- ↑ (4772) Frankdrake at the IAU Minor Planet Center (English)
- ↑ David Vokrouhlický , Miroslav Brož , Alessandro Morbidelli , William Bottke , David Nesvorný , Daniel Lazzaro, Andy Rivkin: Yarkovsky footprints in the Eos family (English, PDF ; 26 MB)