b Sculptoris

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. Combined General Catalogue of Variable Stars (suspected variables)

catalogues and names b Scl, NSV 14608, HR 8937, HD 221507, SAO 214615, FK5: 886
constellation Sculptor

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


position, motion, parallax:

position (J2000) RA: 23h 32min 58,3sec DEC: -37° 49' 6''
position (J1900) RA: 23h 27min 36,6sec DEC: -38° 22' 16''
proper motion (J2000) RA: 0,087 arcsec/a DEC: 0,021 arcsec/a
radial velocity 2 km/s
rotational velocity 37 km/s (uncertain) (variable)

magnitude

visual magnitude 4,37
(V on UBV Johnson system)

spectral / color information

spectral class B9.5IVpHgMnEu
B-V-magnitude -0,09
U-B-magnitude -0,36
R-I-magnitude -0,07
note (category: spectra): HgMn star. Gallium lines strong.

variability information

variable star identification 14608
note (category: variability): Alpha CV? 4.36 - 4.39V.

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

position, motion, parallax:

position (J2000) RA: 23h 32min 58,262sec DEC: -37° 49' 6,29'' ±0,06 arcsec source: 15
proper motion (J2000) RA: 0,0074 arcsec/a DEC: 0,021 arcsec/a source: 25
radial velocity 2 km/s source: 25
galactic coord. (B1950) longitude: 355,04° latitude: -70,36°
GCI unit vector (J2000) X: 0,784471 Y: -0,092949 Z: -0,613161

magnitude:

visual 4,37 (observed) source: 25
photovisual 4,5 source: 2
photographic 4,4 source: 2

spectral information:

spectral class B9 source: 96
Morgan-Keenan B9.5IVpHgMnEu source: 25
B-magnitude 4,28 ±0,05 B-V-magnitude -0,09
U-magnitude 3,92 ±0,05 U-B-magnitude -0,36

variability information:

source of data: 28
variability type 160
var. amplitude 0,04

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
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: 23h 30min 17,688sec DEC: -38° 5' 42,35'' ±0,01 arcsec
position (J2000) RA: 23h 32min 58,268sec DEC: -37° 49' 6,75''
proper motion J1950 (FK4) RA: 0,0073 arcsec/a DEC: 0,02 arcsec/a ±0,002 arcsec/a in RA
±0,002 arcsec/a in DEC
proper motion J2000 (FK5) RA: 0,0074 arcsec/a DEC: 0,016 arcsec/a
source of proper motion data Determined by source catalog

magnitude:

visual 4,5 (accuracy: 2 decimals)
source of visual magnitude data Taken from the "Henry Draper Catalogue".

spectral information:

spectral class B9
source of spectral data Taken from the Henry Draper Catalogue or no spectrum in source catalog.

catalogues

source catalogue FK4, catalogue number: 886
Durchmusterung CD-3815527
Boss General Catalogue 32744
Henry Draper Catalogue 221507

data from Combined General Catalogue of Variable Stars (suspected variables) (Kholopov+ 1998)

position:

position (J1950) RA: 23h 30min 17,7sec DEC: -38° 5' 42''

variability informations:

variability type ACV: rotating variable star
magnitute at max. brightness 4,35
magnitute at min. brightness 4,39
photometric system visual, photovisual or Johnson's V

spectral information

spectral class AP

references

to a study 620630D (designation: BETA SCL)

variability type description

variability type description
ACV
 Alpha2 Canum Venaticorum variables. These are main-sequence stars with spectral types B8p-A7p and displaying strong magnetic fields.
Spectra show abnormally strong lines of Si, Sr, Cr, and rare earths whose intensities vary with rotation. They exhibit magnetic field and brightness changes (periods of 0.5-160 days or more). The amplitudes of the brightness changes are usually withine 0.01-0.1 mag in V.

ACVO
Rapidly oscillating Alpha2 CVn variables. These are nonradially pulsating, rotating magnetic variables of Ap spectral type (DO Eri). Pulsation periods are in the range of 6-12 mmag (0.004-0.01 days), while amplitudes of light variation caused by the pulsation are about 0.01 mag in V. The pulsational variations are superposed on those caused by rotation.