catalogues and names

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

SKY2000 - Master Star Catalog

Smithsonian Astrophysical Observatory Star Catalog

catalogues and names

catalogues and names	36 Dra, HR 6850, HD 168151, SAO 17828, BD +64 1252, FK5: 685
constellation	Draco

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

position, motion, parallax:

position (J2000)	RA: 18h 13min 53.8sec	DEC: +64° 23' 50''
position (B1900)	RA: 18h 13min 19.2sec	DEC: +64° 21' 48''
proper motion (J2000)	RA: 0.349 arcsec/a	DEC: 0.035 arcsec/a
radial velocity	-35 km/s
rotational velocity	8 km/s (uncertain) (variable)
trigonometric parallax	0.047 arcsec
galactic coordinates	longitude: 93.97°	latitude: 28.29°

magnitude

visual magnitude

5.03 (V on UBV Johnson system)

spectral / color information

spectral class	F5V
B-V-magnitude	0.38
U-B-magnitude	-0.04

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

position, motion, parallax:

position (J2000)	RA: 18h 13min 53.802sec	DEC: +64° 23' 50.19''	±0.06 arcsec	source: 15
proper motion (J2000)	RA: 0.0538 arcsec/a	DEC: 0.035 arcsec/a		source: 25
radial velocity	-35 km/s			source: 25
trigonometric parallax	0.047 arcsec		±0.005 arcsec	source: 25
galactic coord. (B1950)	longitude: 93.97°	latitude: 28.29°

magnitude:

visual	5.02 (observed)	source: 25
photovisual	5	source: 2

spectral information:

spectral class	F5		source: 96
Morgan-Keenan	F5V		source: 25
B-magnitude	5.43 ±0.05	B-V-magnitude	0.41
U-magnitude	5.37 ±0.05	U-B-magnitude	-0.06

double/multiple star system information:

source of data: 19

separation between brightest and second brightest component	284 arcsec
magnitude difference between brightest and second brightest component	4
position angle	264 °

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
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: 18h 13min 36.422sec	DEC: +64° 22' 48.39''	±0.004 arcsec
position (J2000)	RA: 18h 13min 53.781sec	DEC: +64° 23' 50.19''
proper motion B1950 (FK4)	RA: 0.0526 arcsec/a	DEC: 0.032 arcsec/a	±0.001 arcsec/a in RA ±0.001 arcsec/a in DEC
proper motion J2000 (FK5)	RA: 0.0535 arcsec/a	DEC: 0.035 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	F5
source of spectral data	Taken from the Henry Draper Catalogue or no spectrum in source catalog.

catalogues

source catalogue	FK4, catalogue number: 685
Durchmusterung	BD+64 1252
Boss General Catalogue	24916
Henry Draper Catalogue	168151