Arkab Prior


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 Arkab Prior, b1Sgr, HR 7337, HD 181454, SAO 229646, FK5: 1502, WDS 19226-4428A
constellation Sagittarius

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

note (category: star names): Arkab Prior; Arkab or Urkab with HR 7343.

position, motion, parallax:

position (J2000) RA: 19h 22min 38,3sec DEC: -44 27' 32''
position (J1900) RA: 19h 15min 27sec DEC: -44 38' 48''
proper motion (J2000) RA: 0,009 arcsec/a DEC: -0,02 arcsec/a
radial velocity -11 km/s
rotational velocity 84 km/s (uncertain) (variable)

magnitude

visual magnitude 4,01
(V on UBV Johnson system)

spectral / color information

spectral class B9V
B-V-magnitude -0,1
U-B-magnitude -0,39

double/multiple star system information

separation 28,3 arcsec
mag difference (of double or brightest multiple) 3,3
note Worley (1978) update of the IDS
note (category: double and multiple data): CPM. Companion A5V; vsini 129k/s, optical?

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

position, motion, parallax:

position (J2000) RA: 19h 22min 38,296sec DEC: -44 27' 32,29'' 0,06 arcsec source: 15
proper motion (J2000) RA: 0,0009 arcsec/a DEC: -0,02 arcsec/a source: 25
radial velocity -11 km/s source: 25
galactic coord. (B1950) longitude: 353,62 latitude: -23,93
GCI unit vector (J2000) X: 0,251822 Y: -0,667853 Z: -0,700398

magnitude:

visual 4,01 (observed) source: 25
photovisual 4,2 source: 2
photographic 4,2 source: 2

spectral information:

spectral class B8 source: 96
Morgan-Keenan B9V source: 25
B-magnitude 3,91 0,05 B-V-magnitude -0,1
U-magnitude 3,52 0,05 U-B-magnitude -0,39

double/multiple star system information:

source of data: 19
separation between brightest and second brightest component 28,3 arcsec
magnitude difference between brightest and second brightest component 3,23
position angle 77

component magnitude spectral class catalogue(s)/name(s)
A 4,01 B8 Arkab Prior, b1Sagittarii, HR 7337, HD 181454, SAO 229646
B 7,21 A3

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 (J1950) RA: 19h 19min 2,816sec DEC: -44 33' 17,72'' 0,011 arcsec
position (J2000) RA: 19h 22min 38,276sec DEC: -44 27' 32,41''
proper motion J1950 (FK4) RA: 0,0006 arcsec/a DEC: -0,018 arcsec/a 0,002 arcsec/a in RA
0,002 arcsec/a in DEC
proper motion J2000 (FK5) RA: 0,0006 arcsec/a DEC: -0,02 arcsec/a
source of proper motion data Determined by source catalog

magnitude:

visual 4,3 (accuracy: 2 decimals)
source of visual magnitude data Taken from the "Henry Draper Catalogue".

spectral information:

spectral class B8
source of spectral data Taken from the Henry Draper Catalogue or no spectrum in source catalog.

catalogues

source catalogue FK4, catalogue number: 1502
Durchmusterung CD-4413277
Boss General Catalogue 26703
Henry Draper Catalogue 181454

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

position and proper motion:

position (J2000) RA: 19h 22,6min DEC: -44 28'
proper motion (J2000) RA: 0,009 arcsec/a DEC: -0,02 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
- 1835 15 77 28,3'' 3,98 7,21 B8V F0V DUN 226

discoverer information:

discoverer code discoverer reference
DUN 226 Dunlop, J. -

notes:

note Beta (1) Sgr. B is CD-44@13278. Proper motion of B +011