(8598) Tetrix
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Asteroid (8598) Tetrix |
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|---|---|
| Properties of the orbit ( animation ) | |
| Orbit type | Main outer belt asteroid |
| Asteroid family | Themis family |
| Major semi-axis | 3.1514 AU |
| eccentricity | 0.1436 |
| Perihelion - aphelion | 2.6987 AU - 3.6040 AU |
| Inclination of the orbit plane | 0.5517 ° |
| Length of the ascending node | 295.4655 ° |
| Argument of the periapsis | 189.0117 ° |
| Sidereal period | 5.59 a |
| Mean orbital velocity | 16.78 km / s |
| Physical Properties | |
| Absolute brightness | 13.6 mag |
| history | |
| Explorer |
Cornelis Johannes van Houten , Ingrid van Houten-Groeneveld , Tom Gehrels |
| Date of discovery | 29th September 1973 |
| Another name | 2202 T-2 , 1970 EB 3 , 1976 GW 1 , 1995 SS 54 , 1998 CF 3 , 1998 EO 20 , 1998 EQ 21 |
| 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. | |
(8598) Tetrix is an asteroid located in the outer main belt , which 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 . An unconfirmed sighting (1970 EB 3 ) of the asteroid had already occurred on October 3, 1970 at the Chilean observatory Cerro El Roble .
The asteroid belongs to the Themis family, a group of asteroids named after (24) Themis . According to the SMASS classification ( Small Main-Belt Asteroid Spectroscopic Survey ), a spectroscopic study by Gianluca Masi , Sergio Foglia and Richard P. Binzel in (8598) Tetrix assumed a dark surface, so it could, roughly speaking, be trade a C asteroid .
The orbit inclination of (8598) Tetrix is small at 0.55 °, it is more similar to the plane of the earth's orbit around the sun than the orbit of the other seven planets . The timeless (non- osculating ) orbital elements of (8598) Tetrix are almost identical to those of the two smaller ones, assuming the absolute brightness of 16.9 and 16.4 compared to 13.6, asteroids (300164) 2006 VE 140 and ( 348958) 2006 UO 26 .
(8598) Tetrix is named after the black grouse , whose scientific name is Tetra tetrix or Lyrurus tetrix . At the time the asteroid was named on February 2, 1999, the black grouse was on the Dutch and European Red Lists of Endangered Species . The first letters of the asteroids (8585) to (8600) form the phrase Per aspera ad astra .
Web links
- (8598) Tetrix in the database of the "Asteroids - Dynamic Site" (AstDyS-2, English).
- (8598) Tetrix 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 (8598) Tetrix on minorplanetcenter.net (English)
- ^ Gianluca Masi, Sergio Foglia, Richard P. Binzel: Search for Unusual Spectroscopic Candidates Among 40313 minor planets from the 3rd Release of the Sloan Digital Sky Survey Moving Object Catalog . (English)
- ↑ subdivision of asteroids to S-types, C-types and V-types (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 . Springer, Heidelberg 2012, 6th edition, page 645 (English)