Atria
| Stern Atria (α Trianguli Australis) | |||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| AladinLite | |||||||||||||||||||
| Beobachtungsdaten Äquinoktium: J2000.0, Epoche: J2000.0 | |||||||||||||||||||
| Sternbild | Südliches Dreieck | ||||||||||||||||||
| Rektaszension | 16h 48m 39,895s [1] | ||||||||||||||||||
| Deklination | −69° 01′ 39,77″ [1] | ||||||||||||||||||
| Helligkeiten | |||||||||||||||||||
| Scheinbare Helligkeit | 1,91 mag[1] | ||||||||||||||||||
| Spektrum und Indices | |||||||||||||||||||
| B−V-Farbindex | +1,44[2] | ||||||||||||||||||
| U−B-Farbindex | +1,56[2] | ||||||||||||||||||
| Spektralklasse | K2 IIb-IIIa[1] | ||||||||||||||||||
| Astrometrie | |||||||||||||||||||
| Radialgeschwindigkeit | (−3,0 ± 0,1) km/s[3] | ||||||||||||||||||
| Parallaxe | (8,35 ± 0,15) mas[4] | ||||||||||||||||||
| Entfernung | (391 ± 7) Lj (120 ± 2) pc [4] | ||||||||||||||||||
| Visuelle Absolute Helligkeit Mvis | −3,5 mag[5] | ||||||||||||||||||
| Eigenbewegung[4] | |||||||||||||||||||
| Rek.-Anteil: | (+17,99 ± 0,11) mas/a | ||||||||||||||||||
| Dekl.-Anteil: | (−31,58 ± 0,15) mas/a | ||||||||||||||||||
| Physikalische Eigenschaften | |||||||||||||||||||
| Leuchtkraft | |||||||||||||||||||
| Andere Bezeichnungen und Katalogeinträge | |||||||||||||||||||
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Atria ist der Eigenname des Sterns α Trianguli Australis (Alpha Trianguli Australis). Der Name ist ein Kunstwort aus der Bayer-Bezeichnung (Alpha Trianguli Australis). Atria gehört der Spektralklasse K2 an und ist etwa 400 Lichtjahre entfernt.
Siehe auch
Weblinks
Einzelnachweise
- ↑ a b c d Hipparcos-Katalog (ESA 1997)
- ↑ a b Bright Star Catalogue
- ↑ Pulkovo radial velocities for 35493 HIP stars
- ↑ a b c Hipparcos, the New Reduction (van Leeuwen, 2007)
- ↑ geschätzt aufgrund der scheinbaren Helligkeit und der Entfernung
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