n1Draconis


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. Combined General Catalogue of Variable Stars (suspected variables)


catalogues and names n1Dra, NSV 09163, 24 Dra, HR 6554, HD 159541, SAO 30447, FK5: 655, WDS 17323+5510B
constellation Draco

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


position, motion, parallax:

position (J2000) RA: 17h 32min 10,6sec DEC: +55 11' 3''
position (J1900) RA: 17h 30min 12,3sec DEC: +55 15' 9''
proper motion (J2000) RA: 0,147 arcsec/a DEC: 0,057 arcsec/a
radial velocity -15 km/s
note: spectroscopic binaries
rotational velocity 66 km/s (uncertain) (variable)
trigonometric parallax 0,035 arcsec

magnitude

visual magnitude 4,88
(V on UBV Johnson system)

spectral / color information

spectral class A6V
B-V-magnitude 0,26
U-B-magnitude 0,04
R-I-magnitude 0,13
note (category: spectra): Also classified Am(A4/F1V/F1).

variability information

variable star identification 9163
note (category: variability): ADS 10628B, I, 4.84 - 4.91V.

double/multiple star system information

separation 62,3 arcsec
mag difference (of double or brightest multiple) 0
note (category: double and multiple data): Binary with HR 6555.

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

position, motion, parallax:

position (J2000) RA: 17h 32min 10,554sec DEC: +55 11' 3,41'' 0,06 arcsec source: 15
proper motion (J2000) RA: 0,0172 arcsec/a DEC: 0,057 arcsec/a source: 25
radial velocity -15 km/s source: 25
trigonometric parallax 0,035 0,003 arcsec source: 25
galactic coord. (B1950) longitude: 83,03 latitude: 33,14
GCI unit vector (J2000) X: -0,069145 Y: -0,566736 Z: 0,820993

magnitude:

visual 4,88 (observed) source: 25
photovisual 5 source: 2

spectral information:

spectral class A5 source: 96
Morgan-Keenan A6V source: 25
B-magnitude 5,14 0,05 B-V-magnitude 0,26
U-magnitude 5,18 0,05 U-B-magnitude 0,04

double/multiple star system information:

source of data: 25
separation between brightest and second brightest component 62,3 arcsec
magnitude difference between brightest and second brightest component 0

component magnitude spectral class catalogue(s)/name(s)
A 4,87 A5 Kuma, n2Draconis, 25 Dra, HR 6555, HD 159560, SAO 30450
B 4,88 A5 n1Draconis, 24 Dra, HR 6554, HD 159541, SAO 30447

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
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: 17h 31min 11,293sec DEC: +55 13' 4,07'' 0,005 arcsec
position (J2000) RA: 17h 32min 10,539sec DEC: +55 11' 3,5''
proper motion J1950 (FK4) RA: 0,0163 arcsec/a DEC: 0,055 arcsec/a 0,001 arcsec/a in RA
0,001 arcsec/a in DEC
proper motion J2000 (FK5) RA: 0,017 arcsec/a DEC: 0,058 arcsec/a
source of proper motion data Determined by source catalog

magnitude:

visual 5 (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.

catalogues

source catalogue FK4, catalogue number: 655
Durchmusterung BD+55 1944
Boss General Catalogue 23797
Henry Draper Catalogue 159541

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

position:

position (J1950) RA: 17h 31min 11,3sec DEC: +55 13' 4''

variability informations:

variability type I eruptive variable star
magnitute at max. brightness 4,84
magnitute at min. brightness 4,91
photometric system visual, photovisual or Johnson's V

spectral information

spectral class AM

references

to a study 742754D (designation: *)

miscanellous

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

variability type description

variability type description
I
Poorly studied irregular variables with unknown features of light variations and spectral types. This is a very inhomogeneous group of objects.