(29075) 1950 DA
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Asteroid (29075) 1950 DA |
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| Properties of the orbit ( animation ) | |
| Orbit type | Apollo type |
| Major semi-axis | 1,699 AU |
| eccentricity | 0.508 |
| Perihelion - aphelion | 0.836 AU - 2.561 AU |
| Inclination of the orbit plane | 12.184 ° |
| Sidereal period | 2 a 78 d |
| Mean orbital velocity | 22.851 km / s |
| Physical Properties | |
| Medium diameter | 2 km |
| Albedo | 0.25 |
| Rotation period | 2 h 7 m |
| Absolute brightness | 17.00 likes |
| Spectral class | E / M type |
| history | |
| Explorer | Carl A. Wirtanen |
| Date of discovery | February 23, 1950 |
| Another name | 2000 YK 66 |
| 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. | |
(29075) 1950 DA is an asteroid that crosses the orbits of both Earth and Mars .
Research history
1950 DA was discovered on February 23, 1950 by Carl A. Wirtanen at the Lick Observatory on Mount Hamilton . After the asteroid was observed for 17 days, it was no longer detectable.
On December 31, 2000, the object was rediscovered by the sky surveillance LONEOS and initially received the provisional designation 2000 YK 66 , until it was determined that it was 1950 DA.
With the help of radar observations at Goldstone and Arecibo Observatory has been able to orbit at 1950 DA with very high accuracy determine . The analysis revealed that 1950 DA will come very close to Earth on March 16, 2880. There is the possibility of a collision with the earth, with the center of the Atlantic being calculated as the impact area . The probability of this, however, is low and is no more than 0.33% (about 1 in 300). 1950 DA with 0.17 was the first object for which a value greater than zero was determined on the Palermo scale . Although in the meantime a positive value on the Palermo scale has been calculated for other asteroids, 1950 DA is so far the only object to which this has been granted for a long time.
The radar observations also show that 1950 DA is an almost spherical object with a diameter of 2 kilometers. The asteroid rotates on its own axis in just two hours , which is unusually fast for an object of this size. Its kinetic energy corresponds to approx. 6.4 · 10 20 joules . In comparison, the Chicxulub impact , which presumably caused the destruction of the dinosaurs 66 million years ago, had an impact energy of approx. 3 · 10 23 joules (current status of research, April 2015).