17 Dra


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


catalogues and names 17 Dra, HR 6185, HD 150117, SAO 30013, WDS 16362+5255A
constellation Draco

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


position, motion, parallax:

position (J2000) RA: 16h 36min 13,7sec DEC: +52 55' 28''
position (J1900) RA: 16h 33min 51,9sec DEC: +53 7' 31''
proper motion (J2000) RA: -0,009 arcsec/a DEC: 0,027 arcsec/a
radial velocity -10 km/s
note: variable radial velocity
rotational velocity 216 km/s (uncertain) (variable)
dynamical parallax 0,01 arcsec

magnitude

visual magnitude 5,08
(V on UBV Johnson system)

spectral / color information

spectral class B9V
B-V-magnitude -0,04
U-B-magnitude -0,15

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): AB binary with HR 6186 = component D; combined colors, combined mag. 5.08, B8V, A1V. Component C = HR 6184 CPM.

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

position, motion, parallax:

position (J2000) RA: 16h 36min 13,583sec DEC: +52 55' 28,44'' 0,35 arcsec source: 17
proper motion (J2000) RA: -0,0053 arcsec/a DEC: 0,047 arcsec/a source: 25
radial velocity -10 km/s source: 25
galactic coord. (B1950) longitude: 80,97 latitude: 41,48
GCI unit vector (J2000) X: -0,215492 Y: -0,563037 Z: 0,797843

magnitude:

visual 5,08 (observed) source: 25
photovisual 5,6 source: 2
photographic 5,6 source: 16

spectral information:

spectral class A2 source: 96
Morgan-Keenan B9V source: 25
B-magnitude 5,04 0,05 B-V-magnitude -0,04
U-magnitude 4,88 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
16 PPM North and PPM South Catalogs and PPM Supplement
Roser, S., and U. Bastian, "Catalogue of Positions and Proper Motions," A&AS, Vol. 74, p. 449, 1988, and Bastian, U., et al., "Catalogue of Positions and Proper Motions - South," 1993
17 ACRS
Corbin, T.E., and S.E. Urban, Astrographic Catalog Reference Stars, United States Naval Observatory, 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: 16h 35min 2,648sec DEC: +53 1' 27,12'' 0,018 arcsec
position (J2000) RA: 16h 36min 13,742sec DEC: +52 55' 27,99''
proper motion J1950 (FK4) RA: -0,0017 arcsec/a DEC: 0,025 arcsec/a 0,003 arcsec/a in RA
0,002 arcsec/a in DEC
proper motion J2000 (FK5) RA: -0,001 arcsec/a DEC: 0,027 arcsec/a
source of proper motion data Determined by source catalog

magnitude:

visual 5,6 (accuracy: 2 decimals)
source of visual magnitude data Taken from Harvard or San Luis photometry.

spectral information:

spectral class A2
source of spectral data Taken from the Henry Draper Catalogue or no spectrum in source catalog.

remarks for duplicity and variability

Double star in Aitken's Double Star Catalogue (Aitken 1932)

catalogues

source catalogue GC, catalogue number: 22352
Durchmusterung BD+53 1876
Boss General Catalogue 22352
Henry Draper Catalogue 150117
The "SAO Catalog" entry refers to two consecutive HD numbers, the lower of which is given.

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.