Sadalsuud


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 Sadalsuud, b Aqr, 22 Aqr, HR 8232, HD 204867, SAO 145457, FK5: 808, WDS 21316-0534A
other names Sadalsud, Sad es Saud, Sadalsund, Saad el Sund
constellation Aquarius

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

note (category: star names): Sadalsuud; Sadalsud; Sad es Saud; Sadalsund; Saad el Sund.

object is infrared source (NASA merged infrared catalogue, Schmitz et al., 1978)

position, motion, parallax:

position (J2000) RA: 21h 31min 33,5sec DEC: -5 34' 16''
position (J1900) RA: 21h 26min 17,7sec DEC: -6 0' 40''
proper motion (J2000) RA: 0,021 arcsec/a DEC: -0,008 arcsec/a
radial velocity 7 km/s
note: suspected variable radial velocity
rotational velocity 18 km/s (uncertain) (variable)
trigonometric parallax 0,006 arcsec

magnitude

visual magnitude 2,91
(V on UBV Johnson system)

spectral / color information

spectral class G0Ib
B-V-magnitude 0,83
U-B-magnitude 0,56
R-I-magnitude 0,43

double/multiple star system information

number of components of multiple star system 3
separation 35,5 arcsec
mag difference (of double or brightest multiple) 7,9
component ID AB
note (category: double and multiple data): Both companions optical.

miscellaneous information

note (category: group membership): With Alpha Aqr (HR 8414) and Epsilon Peg (HR 8308) forms an OB triple system. Motion of HR 8232 and 8414 (separated by 12d) is nearly perpendicular to the galactic plane.

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

position, motion, parallax:

position (J2000) RA: 21h 31min 33,538sec DEC: -5 34' 16,25'' 0,06 arcsec source: 15
proper motion (J2000) RA: 0,0014 arcsec/a DEC: -0,008 arcsec/a source: 25
radial velocity 7 km/s source: 25
trigonometric parallax 0,006 0,001 arcsec source: 25
galactic coord. (B1950) longitude: 48,03 latitude: -37,88
GCI unit vector (J2000) X: 0,793709 Y: -0,600501 Z: -0,097082

magnitude:

visual 2,91 (observed) source: 25
photovisual 3,1 source: 2
photographic 3,6 source: 2

spectral information:

spectral class G0 source: 96
Morgan-Keenan G0Ib source: 25
B-magnitude 3,74 0,05 B-V-magnitude 0,83
U-magnitude 4,3 0,05 U-B-magnitude 0,56

double/multiple star system information:

source of data: 19
separation between brightest and second brightest component 35,4 arcsec
magnitude difference between brightest and second brightest component 8,1
position angle 319

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: 21h 28min 55,65sec DEC: -5 47' 31,68'' 0,003 arcsec
position (J2000) RA: 21h 31min 33,545sec DEC: -5 34' 16,27''
proper motion J1950 (FK4) RA: 0,0013 arcsec/a DEC: -0,005 arcsec/a 0,001 arcsec/a in RA
0,001 arcsec/a in DEC
proper motion J2000 (FK5) RA: 0,0015 arcsec/a DEC: -0,008 arcsec/a
source of proper motion data Determined by source catalog

magnitude:

visual 3,1 (accuracy: 2 decimals)
source of visual magnitude data Taken from the "Henry Draper Catalogue".

spectral information:

spectral class G0
source of spectral data Taken from the Henry Draper Catalogue or no spectrum in source catalog.

catalogues

source catalogue FK4, catalogue number: 808
Durchmusterung BD-06 5770
Boss General Catalogue 30137
Henry Draper Catalogue 204867

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

position and proper motion:

position (J2000) RA: 21h 31,6min DEC: -5 34'
proper motion (J2000) RA: 0,021 arcsec/a DEC: -0,008 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 1879 12 319 34,3'' 2,91 11 G0Ib H 76
1962 - 35,4''
AC 1877 9 186 54,5'' 2,91 11,6 - BU 73
1962 - 58,6''

discoverer information:

discoverer code discoverer reference
H 76 Herschel, W. -
BU 73 Burnham, S.W. -

notes:

note H V 76. Beta Aqr.