catalogues and names

The Bright Star Catalogue, 5th Revised Ed. (Preliminary Version)

SKY2000 - Master Star Catalog

Smithsonian Astrophysical Observatory Star Catalog

The Washington Visual Double Star Catalog, 1996.0

Combined General Catalogue of Variable Stars (Vol. I-III)

catalogues and names

catalogues and names	a Cir, alf Cir, HR 5463, HD 128898, SAO 252853, CP -64 2977 A, FK5: 539, WDS 14425-6459
constellation	Circinus

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

position, motion, parallax:

position (J2000)	RA: 14h 42min 30.4sec	DEC: -64° 58' 31''
position (2000.72)	RA: 14h 42min 34sec	DEC: -64° 58' 42''
position (B1900)	RA: 14h 34min 25.2sec	DEC: -64° 32' 23''
proper motion (J2000)	RA: -0.192 arcsec/a	DEC: -0.232 arcsec/a
radial velocity	7 km/s note: spectroscopic binaries
rotational velocity	0 km/s (uncertain) (variable)
trigonometric parallax	0.056 arcsec
galactic coordinates	longitude: 314.34°	latitude: -4.59°

note (category: dynamical parallaxes):

0.074".

magnitude

visual magnitude

3.19 (V on UBV Johnson system)

spectral / color information

spectral class	ApSrEuCr:
B-V-magnitude	0.24
U-B-magnitude	0.12
R-I-magnitude

note (category: spectra):

Also classified F1Vp.

variability information

variable star identification

Alp Cir

note (category: variability):

Amp. 0.03V. Magnetic var., about 4 months. Pulsation period 6.8 min?

double/multiple star system information

separation	15.6 arcsec
mag difference (of double or brightest multiple)	5.4
note	Worley (1978) update of the IDS

note (category: double and multiple data):

Binary. Companion K5V.

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

position, motion, parallax:

position (J2000)	RA: 14h 42min 30.408sec	DEC: -64° 58' 30.51''	±0.06 arcsec	source: 15
position (2000.72)	RA: 14h 42min 34sec	DEC: -64° 58' 42''	JD: 2451809.24
proper motion (J2000)	RA: -0.0302 arcsec/a	DEC: -0.232 arcsec/a		source: 25
radial velocity	7 km/s			source: 25
trigonometric parallax	0.056 arcsec		±0.006 arcsec	source: 25
galactic coord. (B1950)	longitude: 314.34°	latitude: -4.59°

magnitude:

visual	3.19 (observed)	source: 25
photovisual	3.4	source: 2
photographic	3.7	source: 2

spectral information:

spectral class	F0		source: 96
Morgan-Keenan	ApSrEuCr:		source: 25
B-magnitude	3.43 ±0.05	B-V-magnitude	0.24
U-magnitude	3.55 ±0.05	U-B-magnitude	0.12

double/multiple star system information:

source of data: 19

separation between brightest and second brightest component	15.6 arcsec
magnitude difference between brightest and second brightest component	5.29
position angle	227 °

component	magnitude	spectral class	catalogue(s)/name(s)
A	3.19	F0	a Circini, HR 5463, HD 128898, SAO 252853
B	8.46	-

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 (B1950)	RA: 14h 38min 26.38sec	DEC: -64° 45' 32.38''	±0.014 arcsec
position (2000.72)	RA: 14h 42min 35sec	DEC: -64° 58' 29''	JD: 2451809.24
position (J2000)	RA: 14h 42min 30.397sec	DEC: -64° 58' 30.7''
proper motion B1950 (FK4)	RA: -0.0291 arcsec/a	DEC: -0.238 arcsec/a	±0.004 arcsec/a in RA ±0.003 arcsec/a in DEC
proper motion J2000 (FK5)	RA: -0.0303 arcsec/a	DEC: -0.234 arcsec/a
source of proper motion data	Determined by source catalog

magnitude:

visual	3.4 (accuracy: 2 decimals)
source of visual magnitude data	Taken from the "Henry Draper Catalogue".

spectral information:

spectral class	F0
source of spectral data	Taken from the Henry Draper Catalogue or no spectrum in source catalog.

catalogues

source catalogue	FK4, catalogue number: 539
Durchmusterung	CP-64 2977A
Boss General Catalogue	19772
Henry Draper Catalogue	128898

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

position and proper motion:

position (J2000)	RA: 14h 42.5min	DEC: -64° 59'
proper motion (J2000)	RA: -0.192 arcsec/a	DEC: -0.232 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
-	1837	29	244°	15.6''	3.18	8.47	ApSrEuCr:	DUN 166
	1990		227°	-

discoverer information:

discoverer code	discoverer	reference
DUN 166	Dunlop, J.	-

notes:

note	Alpha Cir. Probably variable.

data from Combined General Catalogue of Variable Stars (Vol. I-III) (Kholopov+ 1998)

position:

position (equinox 1950.0)

RA: 14h 38min 26.4sec

DEC: -64° 45' 32''

variability informations:

variability type	ACVO	rotating variable star
magnitute at max. brightness	3.18
magnitute at min. brightness	3.21
photometric system	visual, photovisual or Johnson's V

references

to a study	D.W.Kurtz, M.S.Cropper, IBVS No.1987,1981.
to a chart/photograph	no chart is avaible, but the star is contained in the 'Cape Photographic Durchmusterung'

miscanellous

ID in the GCVS catalogue	23/9001
constellation	Circinus
notes on existence	The star is equivalent to '67321'.

variability type description

variability type

description

ACVO

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.