(137108) 1999 AN 10
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Asteroid (137108) 1999 AN 10 |
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| Animation of the rapprochement in 2027 | |
| Properties of the orbit ( animation ) | |
| Orbit type | Apollo type |
| Major semi-axis | 1.4587 AU |
| eccentricity | 0.5617 |
| Perihelion - aphelion | 0.6387 AU - 2.2787 AU |
| Inclination of the orbit plane | 39.9312 ° |
| Length of the ascending node | 384.3863 ° |
| Argument of the periapsis | 268.3274 ° |
| Time of passage of the perihelion | 23rd August 2018 |
| Sidereal period | 1.76 a |
| Physical Properties | |
| Absolute brightness | 17.9 likes |
| history | |
| Explorer | LINEAR |
| Date of discovery | January 13, 1999 |
| 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. | |
(137108) 1999 AN 10 is an asteroid from Apollo-type . He was observed for the first time on January 26, 1955 by Andreas Doppler and Arno Gnädig.
According to JPL calculations (as of December 17, 2018), the asteroid will pass Earth on August 7, 2027 at a distance of 0.0026066 AU (approx. 389,942 km). This is the closest approximation in the next 100 years.
Such approximations are more common. It is insignificant to the very dense flyby of the asteroid Apophis in the year 2029, but it is also certain that the earth will not be hit.
The asteroid has a diameter of approx. 800–1800 meters and intersects the earth's orbit at two points. So there is a risk of a collision or passing a gravitational keyhole at 2 points of the earth's orbit (and the asteroid orbit) . This was discussed at the time.
After the discovery of an asteroid, there is initially uncertainty about its exact orbit data. These are gradually removed by further measurements that drag on for years, because on the one hand it can only realistically be observed at an angular distance from the sun of well over 90 ° from the earth and on the other hand, as a tiny body, must not be too far away.
The uncertainty is less with the orbit itself than with determining where the asteroid is located on this orbit. The uncertainty range is expressed by the “line of variation” (LOV).
For a collision with the earth, the earth's orbit and asteroid orbit not only have to cross (come very close), both bodies also have to be at this point in their orbit at (almost exactly) the same point in time.
Web links
Individual evidence
- ↑ (137108) 1999 AN10 JPL
- ↑ ESA - European Space Agency. Retrieved January 20, 2020 .
- ↑ In focus - Asteroid 1999 AN 10 - a threat to earth? Retrieved January 20, 2020 .
- ^ A. Milani, SR Chesley, GB Valsecchi: Letters to the Editor - Close approaches of asteroid 1999 AN10: Resonant and non-resonant returns . In: Astronomy and Astrophysics . tape 346 , no. 3 , 1999, ISSN 0004-6361 , p. L65 – L68 , here L67 , bibcode : 1999A & A ... 346L..65M ( articles.adsabs.harvard.edu ).