a Caeli


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 a Cae, NSV 16147, HR 1502, HD 29875, SAO 216926, FK5: 1129, WDS 04406-4152
constellation Caelum

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


position, motion, parallax:

position (J2000) RA: 4h 40min 33,7sec DEC: -41 51' 50''
position (J1900) RA: 4h 37min 20,3sec DEC: -42 3' 16''
proper motion (J2000) RA: -0,141 arcsec/a DEC: -0,077 arcsec/a
radial velocity -1 km/s
note: variable radial velocity
rotational velocity 52 km/s (uncertain) (variable)
trigonometric parallax 0,045 arcsec

magnitude

visual magnitude 4,45
(V on UBV Johnson system)

spectral / color information

spectral class F2V
B-V-magnitude 0,34
U-B-magnitude 0,01
R-I-magnitude 0,21

variability information

variable star identification Var?
note (category: variability): Comp. A of double, Delta Sct?

double/multiple star system information

separation 6,6 arcsec
mag difference (of double or brightest multiple) 8
note Worley (1978) update of the IDS
note (category: double and multiple data): CPM.

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

position, motion, parallax:

position (J2000) RA: 4h 40min 33,708sec DEC: -41 51' 49,73'' 0,06 arcsec source: 15
proper motion (J2000) RA: -0,0126 arcsec/a DEC: -0,077 arcsec/a source: 25
radial velocity -1 km/s source: 25
trigonometric parallax 0,045 0,004 arcsec source: 25
galactic coord. (B1950) longitude: 246,15 latitude: -41,49
GCI unit vector (J2000) X: 0,252998 Y: 0,700443 Z: -0,667362

magnitude:

visual 4,45 (observed) source: 25
photovisual 4,5 source: 2
photographic 4,9 source: 2

spectral information:

spectral class F2 source: 96
Morgan-Keenan F2V source: 25
B-magnitude 4,79 0,05 B-V-magnitude 0,34
U-magnitude 4,8 0,05 U-B-magnitude 0,01

double/multiple star system information:

source of data: 19
separation between brightest and second brightest component 6,6 arcsec
magnitude difference between brightest and second brightest component 8,1
position angle 121

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: 4h 38min 56,921sec DEC: -41 57' 29,94'' 0,01 arcsec
position (J2000) RA: 4h 40min 33,681sec DEC: -41 51' 49,92''
proper motion J1950 (FK4) RA: -0,0135 arcsec/a DEC: -0,078 arcsec/a 0,002 arcsec/a in RA
0,002 arcsec/a in DEC
proper motion J2000 (FK5) RA: -0,0128 arcsec/a DEC: -0,079 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 F2
source of spectral data Taken from the Henry Draper Catalogue or no spectrum in source catalog.

catalogues

source catalogue FK4, catalogue number: 1129
Durchmusterung CD-42 1587
Boss General Catalogue 5708
Henry Draper Catalogue 29875

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

position and proper motion:

position (J2000) RA: 4h 40,6min DEC: -41 52'
proper motion (J2000) RA: -0,141 arcsec/a DEC: -0,077 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
- 1898 6 112 5,6'' 4,45 12,5 F2V HDO 190
1933 121 6,6''

discoverer information:

discoverer code discoverer reference
HDO 190 - -

notes:

note Alpha Cae. A is a Delta Scuti-type variable.