| • Science | • People | • Locations | • Timeline |
| 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 G m (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/ cm³A cubic centimetre cm is an SI derived unit of volume, equal to the volume of a cube with side length of 1 centi metre. It was the basic unit of volume of the CGS system of units. In SI units: 1 cm³ 10−6 cubic metres 1 milli litre (mL) The abbreviat |
| Surface Gravity | 0.0002 m/s² |
| Escape Velocity | 0.0003 km/s |
| Rotation Period | 0.2511 d |
| Spectral Class | ? |
| Absolute Magnitude | 19.2 |
| Albedo | 0.10 |
| Mean Surface Temperature | ~243 KThe kelvin (symbol: K is the SI unit of temperature, and is one of the seven SI base units. It is defined by two facts: zero kelvin is absolute zero (when molecular motion stops), and one kelvin is the fraction 1/273. 16 of the thermodynamic temperature o |
6489 Golevka is an ApolloThe Apollo asteroids are a group of near-Earth asteroids named after 1862 Apollo, the first asteroid of this group to be discovered. They are Earth-crosser asteroids that have orbital semi-major axes greater than that of the Earth. Some can get very close, Mars-crosserAsteroid groups and families Mars A Mars-crosser asteroid is an asteroid whose orbit crosses that of Mars. The known numbered Mars-crossers are listed here. Buried in the list are two peculiar asteroids: 5261 Eureka, the only numbered Martian Trojan, and and Alinda asteroidThe Alinda asteroids are a group of asteroids with a semi-major axis of about 2. 5 AU and an orbital eccentricity approximately between 0. The namesake is 887 Alinda, discovered by Max Wolf in 1918. These objects are held in this region by the 1:3 orbital, discovered in 1991 by Eleanor F. Helin.
Its name has a complicated origin. In 19951995 was a common year starting on Sunday (see link for calendar). It has a Golden number of 1, and was the first year of the International Decade of the World's Indigenous People (1995- 2005): http://www. org/culture/indigenous . Events January events Ja, Golevka was studied simultaneously by three radarThis article is about the device. For the fictional character in M A S H see Corporal Walter (Radar) O'Reilly. antenna (approximately 40m (130ft) in diameter) rotates on a track to observe activities near the horizon. Radar is an acronym for ra dio d etec 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/cm³) and mass (2.10×1011 kg).
| 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) |