Scheat

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Stern
Scheat (β Pegasi)
AladinLite
Observation
dates equinox :  J2000.0 , epoch : J2000.0
Constellation Pegasus
Right ascension 23 h 03 m 46.46 s
declination + 28 ° 04 ′ 58 ″
Apparent brightness 2.44 (2.31 to 2.74) mag
Typing
B − V color index +1.67 
U − B color index +1.96 
R − I index +1.32 
Spectral class M2 II-IIIvar
Variable star type SR 
Astrometry
Radial velocity (8.0 ± 0.3) km / s
parallax (16.64 ± 0.15)  mas
distance (196.0 ± 1.8)  Lj
(60.10 ± 0.54)  pc  
Visual absolute brightness M vis −1.45 mag
Proper movement 
Rec. Share: (187.65 ± 0.12)  mas / a
Dec. portion: (136.93 ± 0.12)  mas / a
Physical Properties
Other names
and catalog entries
Bayer name β pegasi
Flamsteed name 53 Pegasi
Bonn survey BD + 27 ° 4480
Bright Star Catalog HR 8775 [1]
Henry Draper Catalog HD 217906 [2]
Hipparcos catalog HIP 113881 [3]
SAO catalog SAO 90981 [4]
Tycho catalog TYC 2243-1831-1 [5]
2MASS catalog 2MASS J23034644 + 2804580 [6]
Other names Scheat, FK5  870, LTT 16769
annotation
  1. ↑ Calculated from apparent brightness and distance.

Scheat (from Arabic ساق, DMG sāq  ‚Bein ', Bayer name : Beta Pegasi , abbreviated β Peg ) is a variable star of the CO-Cygni type in the constellation Pegasus . Scheat marks the northeastern corner of the Pegasus Square. Its brightness fluctuates between +2.31 and +2.74  mag with a period of about 43 days. Scheat is a red giant of the spectral class M2. It is about 200  light years from Earth. Other names are Menkib and Seat Alpheras .

See also

Web links

Individual evidence

  1. ↑ a b c Hipparcos catalog (ESA 1997)
  2. ↑ a b c bet Peg. In: VSX. AAVSO, accessed October 29, 2018 .
  3. ↑ a b c Bright Star Catalog
  4. ↑ Pulkovo radial velocities for 35493 HIP stars
  5. ↑ a b c Hipparcos, the New Reduction (van Leeuwen, 2007)