6489 Golevka

"Golevka" redirects here. For the studio album by The Evpatoria Report, see Golevka (album).

6489 Golevka
Computer-generated model of Golevka based on Arecibo radar data
Discovery
Discovered byEleanor F. Helin
Discovery date10 May 1991
Designations
(6489) Golevka
1991 JX
Orbital characteristics[1]
Epoch 6 November 2001 (JD 2452219.5)
Uncertainty parameter 0
Observation arc8968 days (24.55 yr)
Aphelion4.021663 AU (601.6322 Gm)
Perihelion0.992813 AU (148.5227 Gm)
2.507238 AU (375.0775 Gm)
Eccentricity0.604021
3.97 yr (1450.1 d)
213.841234°
0° 14m 53.744s / day
Inclination2.278065°
211.596909°
65.939347°
Earth MOID0.0288423 AU (4.31475 Gm)
Jupiter MOID1.13922 AU (170.425 Gm)
TJupiter3.181
Physical characteristics
0.53 km[1]
Mass2.10×1011 kg
Mean density
2.7+0.4
−0.6 g/cm3
6.026 h (0.2511 d)[1]
0.151 ± 0.023[1]
Q
19.2[1]

6489 Golevka is an Apollo, Mars-crosser, and Alinda asteroid discovered in 1991 by Eleanor F. Helin.

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.[2] Between 1991 and 2003, the small force of the Yarkovsky effect caused a shift of 15 kilometers (9.3 mi) from what would be expected based on only gravitational interactions.[2] This helped evaluate the asteroid's bulk density (2.7 ± 0.5 g/cm3) and mass (2.10×1011 kg).

Golevka 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.[3] On the other hand, Golevka's collision probability with any planet is negligible for at least the next nine centuries.[4] Its orbit is strikingly similar to that of 4179 Toutatis in eccentricity, semi-major axis, and inclination. However, Toutatis is better known due to a close approach to Earth in 2004.

  1. ^ a b c d e f Cite error: The named reference jpldata was invoked but never defined (see the help page).
  2. ^ a b Cite error: The named reference Morrison2004 was invoked but never defined (see the help page).
  3. ^ Cite error: The named reference neodys was invoked but never defined (see the help page).
  4. ^ Cite error: The named reference Hudson1998 was invoked but never defined (see the help page).