(2297) Daghestan
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Asteroid (2297) Daghestan |
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| Properties of the orbit ( animation ) | |
| Orbit type | Main outer belt asteroid |
| Asteroid family | Themis family |
| Major semi-axis | 3.1672 AU |
| eccentricity | 0.1267 |
| Perihelion - aphelion | 2.7658 AU - 3.5686 AU |
| Inclination of the orbit plane | 1.6125 ° |
| Length of the ascending node | 140.5161 ° |
| Argument of the periapsis | 92.7436 ° |
| Time of passage of the perihelion | April 22, 2016 |
| Sidereal period | 5.64 a |
| Mean orbital velocity | 16.75 km / s |
| Physical Properties | |
| Medium diameter | 26.579 km (± 0.161) |
| Albedo | 0.091 (± 0.008) |
| Rotation period | 7.75 h (± 0.01) |
| Absolute brightness | 11.4 mag |
| history | |
| Explorer | Nikolai Tschernych |
| Date of discovery | September 1, 1978 |
| Another name | 1978 RE , 1931 EJ, 1954 HL, 1956 TF, 1956 UP, 1959 EG, 1971 HF, 1975 AP, 1976 GD, 1977 MA |
| Source: Unless otherwise stated, the data comes from JPL Small-Body Database Browser . The affiliation to an asteroid family is automatically determined from the AstDyS-2 database . Please also note the note on asteroid items. | |
(2297) Dagestan is an asteroid of the main outer belt , which was discovered by the Soviet astronomer Nikolai Tschernych on September 1, 1978 at the Crimean Observatory in Nautschnyj ( IAU code 095).
There had already been several unconfirmed sightings of the asteroid: in March 1931 (1931 EJ) at the State Observatory Heidelberg-Königstuhl , on April 26, 1954 (1954 HL) at the Royal Observatory of Belgium in Uccle , in October 1956 (1956 TF and 1956 UP) and March 8, 1959 (1959 EG) at the Goethe Link Observatory in Indiana , on April 20, 1971 (1971 HF), January 1975 (1975 AP) and April 1976 (1976 GD) at the Crimean Observatory in Nautschnyj and on June 18, 1977 at Mt John University Observatory in New Zealand .
The mean diameter of (2297) daghestan was determined to be 26.579 (± 0.161) km. The surface is relatively dark with an albedo of rounded 0.09, comparable to the albedo of Mercury . In (2297) Daghestan one assumes a rotation period of just under 8 hours. This value is based on a study of the light curve by James Brinsfield at the 36 cm Schmidt-Cassegrain telescope at the Via Capote Observatory in Thousand Oaks , California from April 8 to 24, 2010, which earlier, more provisional observations by Raoul Behrend and René Roy at the Geneva Observatory confirmed.
The asteroid belongs to the Themis family, a group of asteroids named after (24) Themis . The timeless (non- osculating ) orbit elements of (2297) Daghestan are almost identical to those of the two asteroids with a mean diameter of almost 8 and about 4.5 km smaller asteroids (33264) 1998 HM 56 and (198736) 2005 EB 28 .
(2297) Daghestan was named on January 1, 1981 after the Dagestani ASSR , an autonomous Soviet republic in the Caucasus .
Web links
- (2297) Daghestan in the database of the "Asteroids - Dynamic Site" (AstDyS-2, English).
- (2297) Daghestan in the Small-Body Database of the Jet Propulsion Laboratory .
- Discovery Circumstances of (2297) Daghestan according to the Minor Planet Center of the International Astronomical Union at the Harvard-Smithsonian Center for Astrophysics in Cambridge , Massachusetts (English)
Individual evidence
- ↑ (2297) Daghestan at the IAU Minor Planet Center (English)
- ↑ James Brinsfield: Asteroid Lightcurve Analysis at the Via Capote Observatory: 2010 February-May . The Minor Planet Bulletin, Vol. 37, No. 4, page 146f bibcode : 2010MPBu ... 37..146B (English)
- ↑ Light curve from (2297) Dhagestan of the Geneva observatory (French)
- ↑ The family status of the asteroids in the AstDyS-2 database (English, HTML; 51.4 MB)