catalogues and names

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

SKY2000 - Master Star Catalog

The Washington Visual Double Star Catalog, 1996.0

catalogues and names

catalogues and names	17 Dra, HR 6186, HD 150118, WDS 16362+5255B
constellation	Draco

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

position, motion, parallax:

position (J2000)	RA: 16h 36min 14,1sec	DEC: +52° 55' 27''
position (2001,21)	RA: 16h 36min 16sec	DEC: +52° 55' 18''
position (B1900)	RA: 16h 33min 51,2sec	DEC: +53° 7' 30''
proper motion (J2000)	RA: -0,009 arcsec/a	DEC: 0,027 arcsec/a
radial velocity	-18 km/s
rotational velocity	250 km/s (uncertain) (variable)
dynamical parallax	0,01 arcsec
galactic coordinates	longitude: 80,97°	latitude: 41,48°

magnitude

visual magnitude

6,53 (V on UBV Johnson system)

spectral / color information

spectral class	A1Vnn
B-V-magnitude	-0,06
U-B-magnitude	-0,16

double/multiple star system information

number of components of multiple star system	4
separation	90,3 arcsec
mag difference (of double or brightest multiple)	0
component ID	AC

note (category: double and multiple data):

Binary with HR 6185, q.v.

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

position, motion, parallax:

position (J2000)	RA: 16h 36min 13,933sec	DEC: +52° 55' 27,42''	±0,5 arcsec	source: 25
position (2001,21)	RA: 16h 36min 16sec	DEC: +52° 55' 18''	JD: 2451987,37
proper motion (J2000)	RA: -0,0053 arcsec/a	DEC: 0,047 arcsec/a		source: 25
radial velocity	-18 km/s			source: 25
galactic coord. (B1950)	longitude: 80,97°	latitude: 41,47°

magnitude:

visual	6,53 (observed)	source: 25
photovisual	6,6	source: 2
photographic	6,6	source: 2

spectral information:

spectral class	A2		source: 29
Morgan-Keenan	A1Vnn		source: 25
B-magnitude	6,47 ±0,05	B-V-magnitude	-0,06
U-magnitude	6,31 ±0,05	U-B-magnitude	-0,16

double/multiple star system information:

source of data: 19

separation between brightest and second brightest component	3,3 arcsec
magnitude difference between brightest and second brightest component	1
position angle	106 °

component	magnitude	spectral class	catalogue(s)/name(s)
A	5,08	A2	17 Dra, HR 6185, HD 150117, SAO 30013
B	6,53	A2	17 Dra, HR 6186, HD 150118,

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
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
29	SAOJ2000
SAO on FK5 at J2000, 1989

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

position and proper motion:

position (J2000)	RA: 16h 36,2min	DEC: +52° 55'
proper motion (J2000)	RA: -0,048 arcsec/a	DEC: 0,047 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	1831	88	116°	3,7''	5,6	6,6	B9.5V	STF2078
	1983		106°	3,3''
AC	1833	32	194°	90,3''	5,08	5,53	-	STF 30
BC	1902	2	195°	90''	6,6	5,6	-	STF 30
CD	1879	3	122°	116,9''	5,6	11,6	B9.5V	STF 30
	1956		-	120,1''

discoverer information:

discoverer code	discoverer	reference
STF2078	Struve, F.G.W.	-
STF 30	Struve, F.G.W.	-

notes:

note	17 Dra. Common proper motion with 16 Dra. C is 16 Dra.