(8967) Calandra
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Asteroid (8967) Calandra |
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|---|---|
| Properties of the orbit ( animation ) | |
| Orbit type | Main outer belt asteroid |
| Asteroid family | Eos family |
| Major semi-axis | 3.0570 AU |
| eccentricity | 0.1151 |
| Perihelion - aphelion | 2.7052 AU - 3.4087 AU |
| Inclination of the orbit plane | 9.7429 ° |
| Length of the ascending node | 170.6311 ° |
| Argument of the periapsis | 171.8388 ° |
| Time of passage of the perihelion | March 16, 2016 |
| Sidereal period | 5.34 a |
| Mean orbital velocity | 17.03 km / s |
| Physical Properties | |
| Absolute brightness | 13.1 mag |
| history | |
| Explorer |
Cornelis Johannes van Houten , Ingrid van Houten-Groeneveld , Tom Gehrels |
| Date of discovery | May 13, 1971 |
| Another name | 4878 T-1 , 1978 RM 11 , 1992 EH 15 |
| 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. | |
(8967) Calandra is an asteroid of the outer main belt , which was discovered on May 13, 1971 by the Dutch astronomer couple Cornelis Johannes van Houten and Ingrid van Houten-Groeneveld . The discovery took place during the 1st 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 , eleven years after the start of the Palomar-Leiden- Surveys .
The asteroid belongs to the Eos family , a group of asteroids which typically have large semiaxes from 2.95 to 3.1 AU , bounded inward by the Kirkwood gap of the 7: 3 resonance with Jupiter , and orbital inclinations between 8 ° and 12 °. The group is named after the asteroid (221) Eos . The family is believed to have emerged from a collision more than a billion years ago. The timeless (non- osculating ) orbital elements of (8967) Calandra are almost identical to those of three smaller ones, assuming the absolute magnitudes of 15.6, 15.3 and 16.4 compared to 13.0, asteroids: (241572) 1995 OM 13 , (281668) 2008 VW 46 and (326816) 2003 TY 22 .
The rotation period of (8967) Calandra was published in 2016 by Adam Waszczak, Chan-Kao Chang, Eran Ofek et al. examined. However, the light curve was not sufficient for a determination.
The asteroid was after Bunting named, whose scientific name Miliaria calandra or synonymously Emberiza calandra is. At the time the asteroid was named on February 2, 1999, the gray bunting was on the Dutch Red List of Endangered Birds .
Web links
- (8967) Calandra in the database of the "Asteroids - Dynamic Site" (AstDyS-2, English).
- (8967) Calandra 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
- ↑ David Vokrouhlický , Miroslav Brož , Alessandro Morbidelli , William Bottke , David Nesvorný , Daniel Lazzaro, Andy Rivkin: Yarkovsky footprints in the Eos family (English, PDF ; 26 MB)
- ↑ 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)