(8980) Heliaca
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Asteroid (8980) Heliaca |
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|---|---|
| Properties of the orbit ( animation ) | |
| Orbit type | Middle main belt asteroid |
| Asteroid family | Dora family |
| Major semi-axis | 2.7675 AU |
| eccentricity | 0.1976 |
| Perihelion - aphelion | 2.2207 AU - 3.3143 AU |
| Inclination of the orbit plane | 8.8156 ° |
| Length of the ascending node | 59.8307 ° |
| Argument of the periapsis | 22.4809 ° |
| Time of passage of the perihelion | 15th October 2019 |
| Sidereal period | 4.60 a |
| Mean orbital velocity | 17.91 km / s |
| Physical Properties | |
| Medium diameter | 7.239 (± 2.039) km |
| Albedo | 0.091 (± 0.075) |
| Absolute brightness | 14.1 mag |
| history | |
| Explorer |
Cornelis Johannes van Houten , Ingrid van Houten-Groeneveld , Tom Gehrels |
| Date of discovery | October 16, 1977 |
| Another name | 4190 T-3 , 1968 UJ 3 , 1991 VM 16 , 1993 FF 57 |
| 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. | |
(8980) Heliaca is an asteroid of the central main belt , which was discovered on October 16, 1977 by the Dutch astronomer couple Cornelis Johannes van Houten and Ingrid van Houten-Groeneveld . The discovery took place during the 3rd Trojan survey, during which Tom Gehrels surveyed field plates recorded by the 120 cm Oschin Schmidt telescope of the Palomar observatory at the University of Leiden , 17 years after the start of the Palomar-Leiden- Surveys . The asteroid had already been sighted on October 26, 1968 under the provisional designation 1968 UJ 3 at the Crimean Observatory in Nautschnyj .
The asteroid belongs to the Dora family, a group of asteroids named after (668) Dora . The ageless (not osculating ) orbital elements of (8980) Heliaca are almost identical with those of three smaller asteroids, when one of the absolute brightness starting from 15.5, 17.2 and 16.7 against 14.1: (182476) 2001 SD 116 , (272476) Paoladiomede and (384119) 2008 WV 140 .
The mean diameter of the asteroid was roughly calculated to be 7.239 (± 2.039) km , the albedo also roughly 0.091 (± 0.075).
(8980) Heliaca is named after the eastern imperial eagle , whose scientific name is Aquila heliaca . At the time the asteroid was named on April 2, 1999, the Eastern Imperial Eagle was on the European Red List of Endangered Birds .
Web links
- (8980) Heliaca in the database of the "Asteroids - Dynamic Site" (AstDyS-2, English).
- (8980) Heliaca 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
- ↑ Observations from (8980) Heliaca on minorplanetcenter.net (English)
- ↑ The family status of the asteroids in the AstDyS-2 database (English, HTML; 51.4 MB)
- ^ Lutz D. Schmadel : Dictionary of Minor Planet Names. Volume 2 . Springer, Heidelberg 2012, 6th edition, page 664 (English)