b Scuti


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


catalogues and names b Sct, HR 7063, HD 173764, SAO 142618, FK5: 1489
constellation Scutum

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


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

position, motion, parallax:

position (J2000) RA: 18h 47min 10,5sec DEC: -4 44' 52''
position (J1900) RA: 18h 41min 52,1sec DEC: -4 51' 18''
proper motion (J2000) RA: -0,004 arcsec/a DEC: -0,016 arcsec/a
radial velocity -22 km/s
note: spectroscopic binaries, single lined spectra
note: orbital data avaible
rotational velocity 10 km/s (uncertain) (variable)
trigonometric parallax 0,019 arcsec

magnitude

visual magnitude 4,22
(V on UBV Johnson system)

spectral / color information

spectral class G4IIa
B-V-magnitude 1,1
U-B-magnitude 0,81
R-I-magnitude 0,57
note (category: spectra): H alpha emission. Also classified G5II CN0.5 Fe1 Hdel1. IUE observations indicate a B9.5 companion.

double/multiple star system information

note (category: spectroscopic binaries): 834d, K 16.7k/s, V0 -21.9k/s, asini 179. Unresolved by speckle interferometry.

miscellaneous information

note (category: group membership): Sct OB2.

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

position, motion, parallax:

position (J2000) RA: 18h 47min 10,48sec DEC: -4 44' 52,36'' 0,06 arcsec source: 15
proper motion (J2000) RA: -0,0003 arcsec/a DEC: -0,016 arcsec/a source: 25
radial velocity -22 km/s source: 25
trigonometric parallax 0,019 0,002 arcsec source: 25
galactic coord. (B1950) longitude: 28,23 latitude: -1,22
GCI unit vector (J2000) X: 0,203686 Y: -0,975531 Z: -0,082771

magnitude:

visual 4,22 (observed) source: 25
photovisual 4,5 source: 2
photographic 5 source: 2

spectral information:

spectral class G0 source: 96
Morgan-Keenan G4IIa source: 25
B-magnitude 5,32 0,05 B-V-magnitude 1,1
U-magnitude 6,13 0,05 U-B-magnitude 0,81

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: 18h 44min 31,239sec DEC: -4 48' 10,73'' 0,005 arcsec
position (J2000) RA: 18h 47min 10,481sec DEC: -4 44' 52,4''
proper motion J1950 (FK4) RA: -0,0005 arcsec/a DEC: -0,017 arcsec/a 0,001 arcsec/a in RA
0,001 arcsec/a in DEC
proper motion J2000 (FK5) RA: -0,0003 arcsec/a DEC: -0,017 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 G0
source of spectral data Taken from the Henry Draper Catalogue or no spectrum in source catalog.

catalogues

source catalogue FK4, catalogue number: 1489
Durchmusterung BD-04 4582
Boss General Catalogue 25730
Henry Draper Catalogue 173764