(8970) Islandica
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Asteroid (8970) Islandica |
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|---|---|
| Properties of the orbit ( animation ) | |
| Orbit type | Main outer belt asteroid |
| Asteroid family | Themis family |
| Major semi-axis | 3.0949 AU |
| eccentricity | 0.1179 |
| Perihelion - aphelion | 2.7490 AU - 3.4409 AU |
| Inclination of the orbit plane | 0.3052 ° |
| Length of the ascending node | 68.6053 ° |
| Argument of the periapsis | 87.5616 ° |
| Time of passage of the perihelion | May 10, 2019 |
| Sidereal period | 5.44 a |
| Mean orbital velocity | 16.87 km / s |
| Physical Properties | |
| Medium diameter | 9.266 (± 0.383) km |
| Albedo | 0.062 (± 0.006) |
| Absolute brightness | 14.0 mag |
| history | |
| Explorer |
Cornelis Johannes van Houten , Ingrid van Houten-Groeneveld , Tom Gehrels |
| Date of discovery | 29th September 1973 |
| Another name | 1355 T-2 , 1992 CX 1 |
| 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. | |
(8970) Islandica is an asteroid of the main inner belt that was discovered on September 29, 1973 by the Dutch astronomer couple Cornelis Johannes van Houten and Ingrid van Houten-Groeneveld . The discovery was made during the 2nd Trojan survey, during which Tom Gehrels surveyed field plates recorded with the 120 cm Oschin Schmidt telescope of the Palomar observatory at the University of Leiden , 13 years after the start of the Palomar-Leiden- Surveys .
The mean diameter of the asteroid was calculated to be 9.266 (± 0.383) kilometers, the albedo as 0.062 (± 0.006).
The asteroid belongs to the Themis family, a group of asteroids named after (24) Themis . The timeless (non- osculating ) orbital elements of (8970) Islandica are almost identical to those of twelve other asteroids, of which (23878) 1998 SN 2 is the largest with 14.5, assuming absolute brightness .
(8970) Islandica is named for the spatula , whose scientific name is Bucephala islandica . At the time the asteroid was named on February 2, 1999, the spatula was on the European Red List of Endangered Birds .
See also
Web links
- (8970) Islandica in the database of the "Asteroids - Dynamic Site" (AstDyS-2, English).
- (8970) Islandica in the Small-Body Database of the Jet Propulsion Laboratory of NASA at the California Institute of Technology (Caltech) in Pasadena , California (English)
Individual evidence
- ↑ The family status of the asteroids in the AstDyS-2 database (English, HTML; 51.4 MB)
- ^ Lutz D. Schmadel : Dictionary of Minor Planet Names . Springer, Heidelberg 2012, 6th edition, page 663 (English)