6489 Golevka

Infobox Planet | discovery=yes | physical_characteristics = yes | bgcolour=#FFFFC0 | name=6489 Golevka
discoverer=Eleanor F. Helin
discovered=May 10, 1991
alt_names=1991 JX
mp_category=Alinda, Apollo, Mars-crosser
epoch=July 14, 2004 (JD 2453200.5)
semimajor=373.659 Gm (2.498 AU)
perihelion=147.552 Gm (0.986 AU)
aphelion=599.766 Gm (4.009 AU)
eccentricity=0.605
period=1441.860 d (3.95 a)
inclination=2.277°
asc_node=210.952°
arg_peri=66.832°
mean_anomaly=97.918°
avg_speed=16.980 km/s
dimensions=0.53 km
mass=2.10×10¹¹ kg
density=2.7 g/cm³
surface_grav=0.0002 m/s²
escape_velocity=0.0003 km/s
rotation=0.2511 d [http://www.astrosurf.com/aude-old/map_files/AstVarMAP01-2003.htm ¹]
spectral_type=?
abs_magnitude=19.2
albedo=0.10
single_temperature=~176 K

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, Eupatoria in Crimea, Ukraine (sometimes written Evpatoria or Yevpatoriya), and Kashima in Japan. 'Golevka' comes from the first few letters of each observatory's name.

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 from almost every angle. In 2003 the Yarkovsky effect was first observed at work by high precision radar observations of Golevka. This helped evaluate the asteroid's bulk density (2.7 ± 0.5 g/cm³) and mass (2.10E|11 kg).

It approaches Earth to 7.6 Gm in 2046, 15.1 Gm in 2069, and 16.6 Gm in 2092.

Computer-generated images of Golevka:

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