catalogues and names

The Bright Star Catalogue, 5th Revised Ed. (Preliminary Version)

SKY2000 - Master Star Catalog

Smithsonian Astrophysical Observatory Star Catalog

The Washington Visual Double Star Catalog, 1996.0

Combined General Catalogue of Variable Stars (Vol. I-III)

catalogues and names

catalogues and names	Scheat, b Peg, bet Peg, 53 Peg, HR 8775, HD 217906, SAO 90981, BD +27 4480, FK5: 870, WDS 23038+2805A
other names	Sheat, Seat Alpheras, Menkib
constellation	Pegasus

data from The Bright Star Catalogue, 5th Revised Ed. (Preliminary Version) (Hoffleit+, 1991)

note (category: star names):

SCHEAT; Sheat; Seat Alpheras; Menkib.

position, motion, parallax:

position (J2000)	RA: 23h 3min 46.5sec	DEC: +28° 4' 58''
position (B1900)	RA: 22h 58min 55.5sec	DEC: +27° 32' 25''
proper motion (J2000)	RA: 0.189 arcsec/a	DEC: 0.137 arcsec/a
radial velocity	9 km/s note: variable radial velocity
trigonometric parallax	0.022 arcsec
galactic coordinates	longitude: 95.74°	latitude: -29.05°

magnitude

visual magnitude

2.42 (V on UBV Johnson system)

spectral / color information

spectral class	M2.5II-III
B-V-magnitude	1.67
U-B-magnitude	1.96
R-I-magnitude
IR-note	object is infrared source (NASA merged infrared catalogue, Schmitz et al., 1978)

note (category: spectra):

Ultraviolet FeII emission.

variability information

variable star identification

Bet Peg

note (category: variability):

Lb 2.31 - 2.74V.

double/multiple star system information

number of components of multiple star system	3
separation	253.1 arcsec
mag difference (of double or brightest multiple)	7
component ID	AC

data from SKY2000 - Master Star Catalog (Myers+ 1997)

position, motion, parallax:

position (J2000)	RA: 23h 3min 46.464sec	DEC: +28° 4' 58.1''	±0.06 arcsec	source: 15
proper motion (J2000)	RA: 0.0143 arcsec/a	DEC: 0.137 arcsec/a		source: 25
radial velocity	9 km/s			source: 25
trigonometric parallax	0.022 arcsec		±0.002 arcsec	source: 25
galactic coord. (B1950)	longitude: 95.75°	latitude: -29.05°

magnitude:

visual	2.3 (observed)	source: 31
photovisual	2.6	source: 2

spectral information:

spectral class	M0		source: 96
Morgan-Keenan	M2.5II-III		source: 25
B-magnitude	4.09 ±0.05	B-V-magnitude	1.67
U-magnitude	6.05 ±0.05	U-B-magnitude	1.96

variability information:

source of data: 30

variability type	171
var. amplitude	0.43

double/multiple star system information:

source of data: 19

separation between brightest and second brightest component	108.6 arcsec
magnitude difference between brightest and second brightest component	9.4
position angle	211 °

sources:

2	HD and HDE Catalogs
Cannon, A.J., and E.C. Pickering, Harvard Annals, Vols 91-99, 1918-24, Cambridge, Massachusetts: Harvard University; Cannon, A.J., Harvard Annals, Vol. 100, 1925-36, Cambridge, Massachusetts: Harvard University; and Cannon, A.J., and M. Walton Mayall, Harvard Annals, Vol. 112, 1949, Cambridge, Massachusetts: Harvard University
15	FK5, FK5 Extension and FK5 Supplement
Fricke, W., H. Schwan and T. Lederle, "Fifth Fundamental Catalogue (FK5), Part I. The Basic Fundamental Stars," Veroff. Astronomisches Recheninstitut, No. 32, Heidelberg, Germany, 1988, and Fricke, W., H. Schwan, and T.E. Corbin, "Fifth Fundamental Catalogue (FK5), Part II. The FK5 Extension," Veröff. Astronomisches Recheninstitut, No. 33, Heidelberg, Germany, 1991
19	WDS Catalog
Worley, C.E., and G.G. Douglass, Washington Catalog of Visual Double Stars 1996.0, United States Naval Observatory, 1996
25	Bright Star Catalogue, 5th edition
Hoffleit, D. and Warren, W.H. Jr., The Bright Star Catalogue, 5th Revised Edition, Version 2, 1994
30	GCVS, 4th edition
Kholopov, P.N., et al., General Catalogue of Variable Stars, fourth edition, Moscow: Nauka Publishing House, 1985-88
31	CRM' (non-GCVS variable data)
Warren, W.H. Jr., Northern Hemisphere Catalog of Red Magnitudes, 1994
96	SAO or HD/HDE Catalog
Reference from Value 1 or Reference from Value 2

data from Smithsonian Astrophysical Observatory Star Catalog (SAO Staff 1966; USNO, ADC 1990)

position and proper motion:

position (B1950)	RA: 23h 1min 20.77sec	DEC: +27° 48' 40.45''	±0.004 arcsec
position (J2000)	RA: 23h 3min 46.46sec	DEC: +28° 4' 58.07''
proper motion B1950 (FK4)	RA: 0.0142 arcsec/a	DEC: 0.142 arcsec/a	±0.001 arcsec/a in RA ±0.001 arcsec/a in DEC
proper motion J2000 (FK5)	RA: 0.0142 arcsec/a	DEC: 0.137 arcsec/a
source of proper motion data	Determined by source catalog

magnitude:

visual	2.6 (accuracy: 2 decimals)
source of visual magnitude data	Arithmetic mean of maximum and minimum magnitudes of a variable star

spectral information:

spectral class	M0
source of spectral data	Taken from the Henry Draper Catalogue or no spectrum in source catalog.

remarks for duplicity and variability

Variable star in visual magnitude in source catalog

catalogues

source catalogue	FK4, catalogue number: 870
Durchmusterung	BD+27 4480
Boss General Catalogue	32135
Henry Draper Catalogue	217906

data from The Washington Visual Double Star Catalog, 1996.0 (Worley+, 1996)

position and proper motion:

position (J2000)	RA: 23h 3.8min	DEC: +28° 5'
proper motion (J2000)	RA: 0.189 arcsec/a	DEC: 0.137 arcsec/a

double/multiple star system information:

component	year	number of measures	position angle	angular separation	magnitude of 1st component	magnitude of 2nd component	spectral class(es)	discoverer code
AB	1879	5	208°	98.4''	2.42	11.8	-	HJ 1842
	1924		211°	108.6''
AC	1852	6	95°	264.1''	2.42	9.6	-	HJ 1842
	1924		98°	253.1''

discoverer information:

discoverer code	discoverer	reference
HJ 1842	Herschel, J.	-

notes:

note	Beta Peg. A is an irregular variable, spectrum M2.5II-III. AB is optical.

data from Combined General Catalogue of Variable Stars (Vol. I-III) (Kholopov+ 1998)

position:

position (equinox 1950.0)

RA: 23h 1min 20.8sec

DEC: +27° 48' 40''

variability informations:

variability type	LB	pulsating variable star
magnitute at max. brightness	2.31
magnitute at min. brightness	2.74
photometric system	visual, photovisual or Johnson's V

spectral information

spectral class

M2.5II-IIIe

references

to a study	Vol. I GCVS (see Kholopov et al. 1985-1988)
to a chart/photograph	Vol. I GCVS (see Kholopov et al. 1985-1988)

miscanellous

ID in the GCVS catalogue	62/9002
constellation	Pegasus
notes on existence	The star is equivalent to '0629003 gam'.
There are notes in published catalog.

variability type description

variability type

description

LB

Slow irregular variables. The light variations of these stars show no evidence of periodicity, or any periodicity present is very poorly defined and appears only occasionally. Like for the type I, stars are often attributed to this type because of being insufficiently studied. Many type L variables are really semiregulars or belong to other types. LB Slow irregular variables of late spectral types (K, M, C, S); as a rule, they are giants (CO Cyg). This type is also ascribed, in the GCVS, to slow red irregular variables in the case of unknown spectral types and luminosities. LC Irregular variable supergiants of late spectral types having amplitudes of about 1 mag in V (TZ Cas).