(65803) Didymos
Asteroid (65803) Didymos |
|
---|---|
Properties of the orbit ( animation ) | |
Orbit type | Near-Earth asteroid , PHA |
Major semi-axis | 1.6444 AU |
eccentricity | 0.384 |
Perihelion - aphelion | 1.013 AU - 2.276 AU |
Inclination of the orbit plane | 3.408 ° |
Length of the ascending node | 73.2333 ° |
Argument of the periapsis | 319.25 ° |
Sidereal period | 2.11 a |
Physical Properties | |
Absolute brightness | 18.0 likes |
Spectral class | SMASSII: Xk |
history | |
Explorer | Spacewatch |
Date of discovery | April 11, 1996 |
Another name | 1996 GT |
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. |
(65803) Didymos (1996 GT) is a near-Earth double asteroid . Didymos was selected as the target for the ESA-NASA AIDA ( Asteroid Impact & Deflection Assessment ) mission in 2022. The aim is to try out techniques and technologies for asteroid defense and to slightly change the orbit of the smaller of the two bodies, which is informally known as the Didymoon .
The asteroid was discovered by Joe Montani on April 11, 1996 as part of the Spacewatch project at the Kitt Peak National Observatory . It has a diameter of approx. 800 m. On November 20, 2003, it was found that the asteroid has a moon around 170 meters in diameter orbiting it at a distance of around 1.1 km. The companion was given the provisional designation S / 2003 (65803) 1 . Due to its nature as a double asteroid, it was officially named Didymos in 2004, after the Greek word for twin .
See also
Web links
- With AIDA to the minor planet Didymos Spektrum.de
- AIDA: Asteroid Impact & Deflection Assessment (PDF) lpi.usra.edu, accessed on April 9, 2015
- (65803) Didymos @ NEODyS
- AIDA mission oca.eu
Individual evidence
- ↑ Asteroid Impact & Deflection Assessment (AIDA) ( Memento from June 7, 2015 in the Internet Archive ) on esa.int.
- ↑ Asteroid defense - a test attempt becomes more concrete raumfahrer.net.
- ↑ ESA's planetary defense test set for 2020 esa.int, accessed April 13, 2015.
- ↑ Impact on "Didymoon": ESA and NASA test asteroid defense. heise online, accessed on January 11, 2016 .
- ↑ The moon of (65803) Didymos on johnstonsarchive.net (English).
- ↑ NASA: 65803 Didymos (1996 GT). In: NASA . July 14, 2004, accessed July 10, 2017 .