The object was found in the following catalogues:
  1. The Bright Star Catalogue, 5th Revised Ed. (Preliminary Version)

  2. SKY2000 - Master Star Catalog

  3. Smithsonian Astrophysical Observatory Star Catalog

  4. The Washington Visual Double Star Catalog, 1996.0

  5. Combined General Catalogue of Variable Stars (suspected variables)

catalogues and names Adleramin, a Cep, NSV 13660, 5 Cep, HR 8162, HD 203280, SAO 19302, FK5: 803, WDS 21186+6235A
other names Alderaimin
constellation Cepheus

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

note (category: star names): ALDERAMIN; Alderaimin.

object is infrared source (NASA merged infrared catalogue, Schmitz et al., 1978)

position, motion, parallax:

position (J2000) RA: 21h 18min 34,8sec DEC: +62 35' 8''
position (J1900) RA: 21h 16min 11,5sec DEC: +62 9' 43''
proper motion (J2000) RA: 0,151 arcsec/a DEC: 0,049 arcsec/a
radial velocity -10 km/s
note: variable radial velocity
rotational velocity 246 km/s (uncertain) (variable)
trigonometric parallax 0,068 arcsec


visual magnitude 2,44
(V on UBV Johnson system)

spectral / color information

spectral class A7V
B-V-magnitude 0,22
U-B-magnitude 0,11
R-I-magnitude 0,11

variability information

variable star identification 13660
note (category: variability): ADS 14858A, Delta Sct?, 2.41 - 2.47V.

double/multiple star system information

number of components of multiple star system 4
separation 206,8 arcsec
mag difference (of double or brightest multiple) 9,1
component ID AB

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

position, motion, parallax:

position (J2000) RA: 21h 18min 34,769sec DEC: +62 35' 8,08'' 0,06 arcsec source: 15
proper motion (J2000) RA: 0,0218 arcsec/a DEC: 0,049 arcsec/a source: 25
radial velocity -10 km/s source: 25
trigonometric parallax 0,068 0,007 arcsec source: 25
galactic coord. (B1950) longitude: 101 latitude: 9,17
GCI unit vector (J2000) X: 0,350863 Y: -0,298135 Z: 0,8877


visual 2,44 (observed) source: 25
photovisual 2,6 source: 2

spectral information:

spectral class A5 source: 96
Morgan-Keenan A7V source: 25
B-magnitude 2,66 0,05 B-V-magnitude 0,22
U-magnitude 2,77 0,05 U-B-magnitude 0,11

double/multiple star system information:

source of data: 19
separation between brightest and second brightest component 206,8 arcsec
magnitude difference between brightest and second brightest component 8
position angle 22


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
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 (J1950) RA: 21h 17min 23,181sec DEC: +62 22' 23,74'' 0,003 arcsec
position (J2000) RA: 21h 18min 34,783sec DEC: +62 35' 8,02''
proper motion J1950 (FK4) RA: 0,0215 arcsec/a DEC: 0,052 arcsec/a 0,001 arcsec/a in RA
0,001 arcsec/a in DEC
proper motion J2000 (FK5) RA: 0,022 arcsec/a DEC: 0,049 arcsec/a
source of proper motion data Determined by source catalog


visual 2,6 (accuracy: 2 decimals)
source of visual magnitude data Taken from the "Henry Draper Catalogue".

spectral information:

spectral class A5
source of spectral data Taken from the Henry Draper Catalogue or no spectrum in source catalog.


source catalogue FK4, catalogue number: 803
Durchmusterung BD+61 2111
Boss General Catalogue 29848
Henry Draper Catalogue 203280

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

position and proper motion:

position (J2000) RA: 21h 18,6min DEC: +62 35'
proper motion (J2000) RA: 0,151 arcsec/a DEC: 0,049 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 2 23 209,2'' 2,44 10,4 A7V BU 1502
1907 22 206,8''
B-CD 1907 1 172 19,9'' 10,4 - - BU 1502
CD 1907 1 104 2,6'' 11,1 11,3 - BU 1502

discoverer information:

discoverer code discoverer reference
BU 1502 Burnham, S.W. -


note Alpha Cep. Variable?

data from Combined General Catalogue of Variable Stars (suspected variables) (Kholopov+ 1998)


position (J1950) RA: 21h 17min 23,2sec DEC: +62 22' 24''

variability informations:

variability type DSCT: pulsating variable star
magnitute at max. brightness 2,41
magnitute at min. brightness 2,47
photometric system visual, photovisual or Johnson's V

spectral information

spectral class A7


to a study 711033D (designation: BS 8162)


There are notes in the published catalog (Kukarkin et al.(1982)).

variability type description

variability type description
Variables of the Delta Scuti type. These are pulsating variables of spectral types A0-F5 III-V displaying light amplitudes from 0.003 to 0.9 mag in V (usually several hundredths of a magnitude) and periods from 0.01 to 0.2 days. The shapes of the light curves, periods, and amplitudes usually vary greatly. Radial as well as nonradial pulsations are observed. The variability of some
members of this type appears sporadically and sometimes completely ceases, this being a consequence of strong amplitude modulation with the lower value of the amplitude not exceeding 0.001 mag in some cases. The maximum of the surface layer expansion does not lag behind the maximum light for more than 0.1 periods. DSCT stars are representatives of the galactic disk (flat component) and are phenomenologically close to the SX Phe variables.

Low amplitude group of Delta Sct variables (light amplitude <0.1 mag in V). The majority of this type's representatives are stars of luminosity class V; objects of this subtype generally are representative of the Delta Sct variables in open clusters.