|Discovered by||Eleanor F. Helin|
|Discovery date||May 10, 1991|
|Alternative names||1991 JX|
|Minor planet category||Alinda, Apollo,
|Epoch 2012-Mar-14 (JD 2456000.5)|
|Semi-major axis||2.4995 AU
|Orbital period||3.95 a (1443.3 d)|
|Average orbital speed||16.980 km/s|
|Longitude of ascending node||210.86°|
|Argument of perihelion||66.956°|
|Mean density||2.7 g/cm³|
|Equatorial surface gravity||0.0002 m/s²|
|Escape velocity||0.0003 km/s|
|Rotation period||6.026 hr|
|Absolute magnitude (H)||19.2|
Its name has a complicated origin. In 1995, Golevka was studied simultaneously by three radar observatories across the world: Goldstone in California, Yevpatoria RT-70 radio telescope in Ukraine (Yevpatoria is sometimes romanized as Evpatoria) and Kashima in Japan. 'Golevka' comes from the first few letters of each observatory's name; it was proposed by the discoverer following a suggestion by Alexander L. Zaitsev.
Golevka is a small object, measuring 0.6 × 1.4 km. The radar observations revealed that it has a very strange, angular shape that looks different depending on the direction. In 2003 the Yarkovsky effect was first observed at work by high-precision radar observations of Golevka. Between 1991 and 2003, the small force of the Yarkovsky Effect caused a shift of 15 kilometers (9.4 miles) from what would be expected based on only gravitational interactions. This helped evaluate the asteroid's bulk density (2.7 ± 0.5 g/cm³) and mass (2.10×1011 kg).
It approaches Earth to 0.05 AU (7,500,000 km; 4,600,000 mi) in 2046, 0.10 AU in 2069, and 0.11 AU in 2092. Golevka's collision probability with any planet is negligible for at least the next nine centuries. Its orbit is strikingly similar to that of 4179 Toutatis in eccentricity, semi-major axis, and inclination. But Toutatis is better known due to a close approach to Earth in 2004.
- "JPL Small-Body Database Browser: 6489 Golevka (1991 JX)". Jet Propulsion Laboratory.
- David Morrison (January 14, 2004). "Precision NEO Orbits and the Yarkovsky Effect". Asteroid and Comet Impact Hazards (NASA). Retrieved 2004-04-15.
- "NEODys (6489) Golevka". Department of Mathematics, University of Pisa, ITALY. Retrieved 2009-03-16.
- Hudson, R.; Ostro, S.; Jurgens, R.; Rosema, K.; Giorgini, J.; Winkler, et al. (2000). "Radar observations and physical model of asteroid 6489 Golevka". Icarus 148 (1): 37–51. Bibcode:2000Icar..148...37H. doi:10.1006/icar.2000.6483. hdl:2014/14189.
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