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Encyclopedia > 6489 Golevka
6489 Golevka
Discovery
Discoverer Eleanor F. Helin
Discovery Date May 10, 1991
Alternate Designations 1991 JX
Category Main belt
Orbital Elements
Epoch July 14, 2004 (JD 2453200.5)
Eccentricity (e) 0.605
Semi-Major Axis (a) 373.659 Gm (2.498 AU)
Perihelion (q) 147.552 Gm (0.986 AU)
Aphelion (Q) 599.766 Gm (4.009 AU)
Orbital Period (P) 1441.860 d (3.95 a)
Mean Orbital Speed 18.85 km/s
Inclination (i) 2.277
Longitude of the
Ascending Node
(Ω)
210.952
Argument of Perihelion (ω) 66.832
Mean Anomaly (M) 97.918
Physical Characteristics
Dimensions 0.53 km
Mass 2.10 1011 kg
Density 2.7 g/cm
Surface Gravity 0.0002 m/s
Escape Velocity 0.0003 km/s
Rotation Period 0.2511 d 1 (http://www.astrosurf.com/aude-old/map_files/AstVarMAP01-2003.htm)
Spectral Class  ?
Absolute Magnitude 19.2
Albedo 0.10
Mean Surface Temperature ~243 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, Evpatoria in Ukraine (sometimes written 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 density (2.7 0.5 g/cm ) and mass (2.10 1011 kg).

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The Minor Planets
Vulcanoids | Main belt | Groups and Families | Near-Earth objects | Jupiter Trojans
Centaurs | Trans-Neptunians | Damocloids | Comets | Kuiper Belt | Oort Cloud
(For other objects and regions, see: Binary asteroids, Asteroid moons and the Solar system)
(For a complete listing, see: List of asteroids)

  Results from FactBites:
 
6489 Golevka (660 words)
The spectrum of 6489 Golevka was originally interpreted as a V-type, comparable to the class of what is thought to be achondritic asteroids associated with 4 Vesta.
6489 Golevka was observed with NSFCAM on the NASA IRTF telescope on the nights of June 15 and 16 1999, obtaining several spectra.
Asteroid 6489 Golevka is strikingly irregular and angular.
Was ist Golevka? (276 words)
(6489) Golevka ist ein Asteroid oder Planetoid, aus der Gruppe der Apollo-Asteroiden.
Golevka bewegt sich zwischen 0,9866 AU (Perihel) und 4,0096 AU (Aphel) auf einer stark exzentrischen Bahn in 3,94 Jahren um die Sonne.
Golevka scheint ein massiver Felsbrocken zu sein, der das Überbleibsel einer Kollision darstellt.
  More results at FactBites »


 
 

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