b Horologii

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 Hor, HR 909, HD 18866, SAO 248701, FK5: 2212
constellation Horologium

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


position, motion, parallax:

position (J2000) RA: 2h 58min 47,8sec DEC: -64° 4' 17''
position (J1900) RA: 2h 56min 54,3sec DEC: -64° 28' 8''
proper motion (J2000) RA: 0,022 arcsec/a DEC: 0,001 arcsec/a
radial velocity 24 km/s
note: suspected variable radial velocity
rotational velocity 84 km/s (uncertain) (variable)

magnitude

visual magnitude 4,99
(V on UBV Johnson system)

spectral / color information

spectral class A3-5IIIm:
B-V-magnitude 0,13
U-B-magnitude 0,15
R-I-magnitude 0,05

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

position, motion, parallax:

position (J2000) RA: 2h 58min 47,797sec DEC: -64° 4' 16,65'' ±0,22 arcsec source: 15
proper motion (J2000) RA: 0,0034 arcsec/a DEC: 0,001 arcsec/a source: 25
radial velocity 24 km/s source: 25
galactic coord. (B1950) longitude: 282,85° latitude: -47,79°
GCI unit vector (J2000) X: 0,310803 Y: 0,307556 Z: -0,899339

magnitude:

visual 4,99 (observed) source: 25
photovisual 5,1 source: 2
photographic 5,2 source: 2

spectral information:

spectral class A5 source: 96
Morgan-Keenan A3-5IIIm: source: 25
B-magnitude 5,12 ±0,05 B-V-magnitude 0,13
U-magnitude 5,27 ±0,05 U-B-magnitude 0,15

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: 2h 57min 50,778sec DEC: -64° 16' 10,54'' ±0,025 arcsec
position (J2000) RA: 2h 58min 47,74sec DEC: -64° 4' 15,73''
proper motion J1950 (FK4) RA: 0,0032 arcsec/a DEC: 0,016 arcsec/a ±0,006 arcsec/a in RA
±0,005 arcsec/a in DEC
proper motion J2000 (FK5) RA: 0,0029 arcsec/a DEC: 0,013 arcsec/a
source of proper motion data Determined by source catalog

magnitude:

visual 5,1 (accuracy: 2 decimals)
source of visual magnitude data Taken from Harvard or San Luis photometry.

spectral information:

spectral class A5
source of spectral data Taken from the Henry Draper Catalogue or no spectrum in source catalog.

catalogues

source catalogue GC, catalogue number: 3611
Durchmusterung CP-64 215
Boss General Catalogue 3611
Henry Draper Catalogue 18866