catalogues and names

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

SKY2000 - Master Star Catalog

Smithsonian Astrophysical Observatory Star Catalog

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

catalogues and names

catalogues and names	n Cep, nu Cep, 10 Cep, HR 8334, HD 207260, SAO 19624, BD +60 2288, FK5: 1572
constellation	Cepheus

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

position, motion, parallax:

position (J2000)	RA: 21h 45min 26.9sec	DEC: +61° 7' 15''
position (2000.72)	RA: 21h 45min 28sec	DEC: +61° 7' 27''
position (B1900)	RA: 21h 42min 33.7sec	DEC: +60° 39' 33''
proper motion (J2000)	RA: -0.003 arcsec/a	DEC: -0.003 arcsec/a
radial velocity	-21 km/s note: variable radial velocity
rotational velocity	33 km/s (uncertain) (variable)
trigonometric parallax	0.013 arcsec
galactic coordinates	longitude: 102.31°	latitude: 5.93°

magnitude

visual magnitude

4.29 (V on UBV Johnson system)

spectral / color information

spectral class	A2Ia
B-V-magnitude	0.52
U-B-magnitude	0.13
R-I-magnitude
IR-note	object is infrared source (NASA merged infrared catalogue, Schmitz et al., 1978)

variability information

variable star identification

Nu Cep

note (category: variability):

Alpha Cyg 4.25 - 4.35V, 7.6:d.

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

position, motion, parallax:

position (J2000)	RA: 21h 45min 26.93sec	DEC: +61° 7' 14.87''	±0.06 arcsec	source: 15
position (2000.72)	RA: 21h 45min 28sec	DEC: +61° 7' 27''	JD: 2451809.25
proper motion (J2000)	RA: -0.0004 arcsec/a	DEC: -0.003 arcsec/a		source: 25
radial velocity	-21 km/s			source: 25
trigonometric parallax	0.013 arcsec		±0.001 arcsec	source: 25
galactic coord. (B1950)	longitude: 102.31°	latitude: 5.93°

magnitude:

visual	4.29 (observed)	source: 25
photovisual	4.5	source: 2

spectral information:

spectral class	A2		source: 96
Morgan-Keenan	A2Ia		source: 25
B-magnitude	4.81 ±0.05	B-V-magnitude	0.52
U-magnitude	4.94 ±0.05	U-B-magnitude	0.13

variability information:

source of data: 27

variability type	133
var. amplitude	0.2

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
25	Bright Star Catalogue, 5th edition
Hoffleit, D. and Warren, W.H. Jr., The Bright Star Catalogue, 5th Revised Edition, Version 2, 1994
27	Catalog of Red Magnitudes (CRM)
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: 21h 44min 0.269sec	DEC: +60° 53' 22.5''	±0.005 arcsec
position (2000.72)	RA: 21h 45min 28sec	DEC: +61° 7' 28''	JD: 2451809.25
position (J2000)	RA: 21h 45min 26.951sec	DEC: +61° 7' 14.77''
proper motion B1950 (FK4)	RA: -0.0005 arcsec/a	DEC: 0.001 arcsec/a	±0.001 arcsec/a in RA ±0.001 arcsec/a in DEC
proper motion J2000 (FK5)	RA: -0.0002 arcsec/a	DEC: -0.004 arcsec/a
source of proper motion data	Determined by source catalog

magnitude:

visual	4.5 (accuracy: 2 decimals)
source of visual magnitude data	Taken from the "Henry Draper Catalogue".

spectral information:

spectral class	A2p
source of spectral data	Taken from the Henry Draper Catalogue or no spectrum in source catalog.

catalogues

source catalogue	FK4, catalogue number: 1572
Durchmusterung	BD+60 2288
Boss General Catalogue	30483
Henry Draper Catalogue	207260

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

position:

position (equinox 1950.0)

RA: 21h 44min 0.3sec

DEC: +60° 53' 23''

variability informations:

variability type	ACYG	pulsating variable star
magnitute at max. brightness	4.25
magnitute at min. brightness	4.35
photometric system	visual, photovisual or Johnson's V

references

to a study	J.R.Percy, D.L.Welch, PASP 95,No.570,491,1983.
to a chart/photograph	no chart is avaible, but the star is contained in the 'Bonner Durchmusterung'

miscanellous

ID in the GCVS catalogue	20/9013
constellation	Cepheus
notes on existence	The star is equivalent to '68605'.

variability type description

variability type	description
ACYG	Variables of the Alpha Cygni type, which are nonradially pulsating supergiants of Bep-AepIa spectral types. The light changes with amplitudes of the order of 0.1 mag often seem irregular, being caused by the superposition of many oscillations with close periods. Cycles from several days to several weeks are observed.