Alpha Muscae
| Stern α Muscae | |||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| AladinLite | |||||||||||||||||||
| Beobachtungsdaten Äquinoktium: J2000.0, Epoche: J2000.0 | |||||||||||||||||||
| Sternbild | Fliege | ||||||||||||||||||
| Rektaszension | 12h 37m 11,018s [1] | ||||||||||||||||||
| Deklination | −69° 08′ 08,033″ [1] | ||||||||||||||||||
| Helligkeiten | |||||||||||||||||||
| Scheinbare Helligkeit | 2,68 bis 2,73 mag[2] | ||||||||||||||||||
| Spektrum und Indices | |||||||||||||||||||
| Veränderlicher Sterntyp | BCEP[2] | ||||||||||||||||||
| B−V-Farbindex | -0,17[1] | ||||||||||||||||||
| U−B-Farbindex | -0,86[1] | ||||||||||||||||||
| Spektralklasse | B2 IV[1] | ||||||||||||||||||
| Astrometrie | |||||||||||||||||||
| Parallaxe | (10,34 ± 0,11) mas[1] | ||||||||||||||||||
| Entfernung | (315) Lj (97) pc | ||||||||||||||||||
| Eigenbewegung[1] | |||||||||||||||||||
| Rek.-Anteil: | (−40,20 ± 0,10) mas/a | ||||||||||||||||||
| Dekl.-Anteil: | (−12,80 ± 0,10) mas/a | ||||||||||||||||||
| Physikalische Eigenschaften | |||||||||||||||||||
| Masse | 8 M☉[3] | ||||||||||||||||||
| Radius | 4,7 R☉[3] | ||||||||||||||||||
| Leuchtkraft | |||||||||||||||||||
| Effektive Temperatur | 21900 K[3] | ||||||||||||||||||
| Rotationsdauer | < 2 d[3] | ||||||||||||||||||
| Andere Bezeichnungen und Katalogeinträge | |||||||||||||||||||
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α Muscae ist der hellste Stern im Sternbild Fliege. Der Stern befindet sich in einer Entfernung von etwa 320 Lichtjahren. Er ist außerdem ein veränderlicher Beta-Cephei-Stern.[3] Seine scheinbare Helligkeit schwankt dabei nur minimal zwischen 2,68 und 2,73 mag innerhalb eines Zeitraums von 2 Stunden. Des Weiteren ist der Stern Mitglied der Scorpius-Centaurus-Assoziation, derjenigen Sternassoziation aus massereichen Sternen der Spektralklassen O und B, welche uns am nächsten ist.
Einzelnachweise
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