(6489) Golevka
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Asteroid (6489) Golevka |
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| Radar astronomical record of the shape of the asteroid Golevka from different angles; Image: Jet Propulsion Laboratory | |
| Properties of the orbit ( animation ) | |
| Orbit type | Apollo type |
| Major semi-axis | 2.4981 AU |
| eccentricity | 0.6051 |
| Perihelion - aphelion | 0.9866 AU - 4.0096 AU |
| Inclination of the orbit plane | 2.2769 ° |
| Sidereal period | 3,948 years |
| Mean orbital velocity | 18.84 km / s |
| Physical Properties | |
| Medium diameter | 0.35 x 0.25 x 0.25 km |
| Dimensions | 2.1 x 10 12 kg |
| Medium density | 2.7 ± 0.5 g / cm³ |
| Rotation period | 6.03 hours |
| Absolute brightness | 19 likes |
| Spectral class | SMASSII: Q |
| history | |
| Explorer | Eleanor F. Helin |
| Date of discovery | May 10, 1991 |
| Another name | 1991 JX |
| 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. | |
(6489) Golevka is a near-Earth asteroid (planetoid), from the group of the Apollo asteroids . These are heavenly bodies whose orbits can cross the earth's orbit. However, it is also one of the Alinda asteroids, which are in 3: 1 orbit resonance with Jupiter and in 1: 4 resonance with Earth.
The asteroid was discovered by Eleanor F. Helin at the Mount Palomar Observatory on May 10, 1991 . The name goes back to an international research project and is composed of the names of the radio telescopes involved ( Gol dstone , Ev patoria , Ka shima).
Golevka moves between 0.9866 AU ( perihelion ) and 4.0096 AU ( aphelion ) on a strongly eccentric orbit around the sun in 3.94 years . The orbital eccentricity is 0.6051, the orbit is inclined by 2.2769 ° to the ecliptic . The asteroid can get within 0.034 AU - 13 times the lunar distance - to Earth.
Golevka was closely examined by means of radar observations . It was found that the asteroid is 0.35 × 0.25 × 0.25 km in size and has sharp corners, edges, breaks and hollows. Golevka appears to be a massive boulder that is the remnant of a collision . The asteroid rotates around its own axis in around 6 hours.
Golevka was the first asteroid in which the Jarkowski effect could be detected. This is an orbit deviation caused by radiation pressure due to temperature differences.