Scheat
| Stern Scheat (β Pegasi) | |||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| AladinLite | |||||||||||||||||||||
| Beobachtungsdaten Äquinoktium: J2000.0, Epoche: J2000.0 | |||||||||||||||||||||
| Sternbild | Pegasus | ||||||||||||||||||||
| Rektaszension | 23h 03m 46,458s [1] | ||||||||||||||||||||
| Deklination | +28° 04′ 58,04″ [1] | ||||||||||||||||||||
| Helligkeiten | |||||||||||||||||||||
| Scheinbare Helligkeit | 2,44 (2,31 bis 2,74) mag[1][2] | ||||||||||||||||||||
| Spektrum und Indices | |||||||||||||||||||||
| Veränderlicher Sterntyp | SR[2] | ||||||||||||||||||||
| B−V-Farbindex | +1,67[3] | ||||||||||||||||||||
| U−B-Farbindex | +1,96[3] | ||||||||||||||||||||
| R−I-Index | +1,32[3] | ||||||||||||||||||||
| Spektralklasse | M2 II-IIIvar[1] | ||||||||||||||||||||
| Astrometrie | |||||||||||||||||||||
| Radialgeschwindigkeit | (8,0 ± 0,3) km/s[4] | ||||||||||||||||||||
| Parallaxe | (16,64 ± 0,15) mas[5] | ||||||||||||||||||||
| Entfernung | (196,0 ± 1,8) Lj (60,10 ± 0,54) pc [5] | ||||||||||||||||||||
| Visuelle Absolute Helligkeit Mvis | −1,45 mag[Anm 1] | ||||||||||||||||||||
| Eigenbewegung[5] | |||||||||||||||||||||
| Rek.-Anteil: | (187,65 ± 0,12) mas/a | ||||||||||||||||||||
| Dekl.-Anteil: | (136,93 ± 0,12) mas/a | ||||||||||||||||||||
| Physikalische Eigenschaften | |||||||||||||||||||||
| Andere Bezeichnungen und Katalogeinträge | |||||||||||||||||||||
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| Anmerkung | |||||||||||||||||||||
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Scheat (aus arabisch ساق, DMG sāq ‚Bein‘, Bayer-Bezeichnung: Beta Pegasi, abgekürzt β Peg) ist ein Veränderlicher Stern vom CO-Cygni-Typ im Sternbild Pegasus. Scheat markiert das nordöstlichste Eck des Pegasusquadrats. Seine Helligkeit schwankt zwischen +2,31 und +2,74 mag mit einer Periode von etwa 43 Tagen.[2] Scheat ist ein Roter Riese der Spektralklasse M2. Er ist etwa 200 Lichtjahre von der Erde entfernt. Andere Namen sind Menkib und Seat Alpheras.
Siehe auch
Weblinks
Einzelnachweise
- ↑ a b c Hipparcos-Katalog (ESA 1997)
- ↑ a b c bet Peg. In: VSX. AAVSO, abgerufen am 29. Oktober 2018.
- ↑ a b c Bright Star Catalogue
- ↑ Pulkovo radial velocities for 35493 HIP stars
- ↑ a b c Hipparcos, the New Reduction (van Leeuwen, 2007)
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