6489 Golevka
Encyclopedia
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 Golevkahttp://impact.arc.nasa.gov/news_detail.cfm?ID=132. This helped evaluate the asteroid's bulk density (2.7 ± 0.5 g/cm³) and mass (2.10 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:
Apollo asteroid
The Apollo asteroids are a group of near-Earth asteroids named after 1862 Apollo, the first asteroid of this group to be discovered by Karl Wilhelm Reinmuth...
, Mars-crosser
Mars-crosser asteroid
A Mars-crosser is an asteroid whose orbit crosses that of Mars. The known numbered Mars-crossers are listed here. They include the two numbered Mars trojans 5261 Eureka and ....
and Alinda asteroid
Alinda family
The Alinda asteroids are a group of asteroids with a semi-major axis of about 2.5 AU and an orbital eccentricity approximately between 0.4 and 0.65. The namesake is 887 Alinda, discovered by Max Wolf in 1918....
, discovered in 1991 by Eleanor F. Helin
Eleanor F. Helin
Eleanor Francis "Glo" Helin was an American astronomer. She was principal investigator of the Near Earth Asteroid Tracking program of NASA's Jet Propulsion Laboratory. Some sources give her name as Eleanor Kay Helin...
.
Its name has a complicated origin. In 1995, Golevka was studied simultaneously by three radar
Radar
Radar is an object-detection system which uses radio waves to determine the range, altitude, direction, or speed of objects. It can be used to detect aircraft, ships, spacecraft, guided missiles, motor vehicles, weather formations, and terrain. The radar dish or antenna transmits pulses of radio...
observatories across the world: Goldstone in California
California
California is a state located on the West Coast of the United States. It is by far the most populous U.S. state, and the third-largest by land area...
, Yevpatoria RT-70 radio telescope
Yevpatoria RT-70 radio telescope
The Yevpatoria RT-70 radio telescope is an RT-70 radio telescope and planetary radar at the Center for Deep Space Communications, Yevpatoria, Crimea, Ukraine. In the scientific literature is often called Evpatoria planetary radar .With its 70m antenna diameter, it is among the largest single dish...
in Ukraine
Ukraine
Ukraine is a country in Eastern Europe. It has an area of 603,628 km², making it the second largest contiguous country on the European continent, after Russia...
(Yevpatoria is sometimes romanized
Romanization of Ukrainian
The romanization or Latinization of Ukrainian is the representation of the Ukrainian language using Latin letters. Ukrainian is natively written in its own Ukrainian alphabet, a variation of Cyrillic....
as Evpatoria) and Kashima in Japan
Japan
Japan is an island nation in East Asia. Located in the Pacific Ocean, it lies to the east of the Sea of Japan, China, North Korea, South Korea and Russia, stretching from the Sea of Okhotsk in the north to the East China Sea and Taiwan in the south...
. '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
Radar
Radar is an object-detection system which uses radio waves to determine the range, altitude, direction, or speed of objects. It can be used to detect aircraft, ships, spacecraft, guided missiles, motor vehicles, weather formations, and terrain. The radar dish or antenna transmits pulses of radio...
observations revealed that it has a very strange, angular shape that looks different depending on the direction. In 2003 the Yarkovsky effect
Yarkovsky effect
The Yarkovsky effect is a force acting on a rotating body in space caused by the anisotropic emission of thermal photons, which carry momentum...
was first observed at work by high-precision radar observations of Golevkahttp://impact.arc.nasa.gov/news_detail.cfm?ID=132. This helped evaluate the asteroid's bulk density (2.7 ± 0.5 g/cm³) and mass (2.10 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: