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

4th Catalog of Orbits of Visual Binaries

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

catalogues and names

catalogues and names	a Dor, alf Dor, HR 1465, HD 29305, SAO 233564, CP -55 663, FK5: 171, WDS 04340-5503A
constellation	Dorado

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

position, motion, parallax:

position (J2000)	RA: 4h 33min 59.8sec	DEC: -55° 2' 42''
position (2000.72)	RA: 4h 34min 1sec	DEC: -55° 2' 37''
position (B1900)	RA: 4h 31min 50sec	DEC: -55° 15' 6''
proper motion (J2000)	RA: 0.051 arcsec/a	DEC: -0.003 arcsec/a
radial velocity	26 km/s
rotational velocity	82 km/s (uncertain) (variable)
trigonometric parallax	0.018 arcsec
galactic coordinates	longitude: 263.83°	latitude: -41.42°

magnitude

visual magnitude

3.27 (V on UBV Johnson system)

spectral / color information

spectral class	A0IIISi
B-V-magnitude	-0.1
U-B-magnitude	-0.35
R-I-magnitude

variability information

variable star identification

Alp Dor

note (category: variability):

Alpha CV 3.26 - 3.30V, amp. 0.10u, 2.943d.

double/multiple star system information

number of components of multiple star system	3
separation	0.2 arcsec
mag difference (of double or brightest multiple)	0.5
note	Worley (1978) update of the IDS

note (category: double and multiple data):

3.8 A0IIIp, 4.3 B9IV, 13.00y, a = 0.212". Combined mag., colors. Companion 10v at 78" optical.

miscellaneous information

note (category: group membership):

Member of Pleiades group.

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

position, motion, parallax:

position (J2000)	RA: 4h 33min 59.781sec	DEC: -55° 2' 42.21''	±0.06 arcsec	source: 15
position (2000.72)	RA: 4h 34min 1sec	DEC: -55° 2' 37''	JD: 2451809.24
proper motion (J2000)	RA: 0.006 arcsec/a	DEC: -0.004 arcsec/a		source: 25
radial velocity	26 km/s			source: 25
trigonometric parallax	0.018 arcsec		±0.002 arcsec	source: 25
galactic coord. (B1950)	longitude: 263.83°	latitude: -41.42°

magnitude:

visual	3.27 (observed)	source: 25
photovisual	3.5	source: 2
photographic	3.5	source: 2

spectral information:

spectral class	A0		source: 96
Morgan-Keenan	A0IIISi		source: 25
B-magnitude	3.17 ±0.05	B-V-magnitude	-0.1
U-magnitude	2.82 ±0.05	U-B-magnitude	-0.35

variability information:

source of data: 30

variability type	160
var. amplitude	0.04
var. period	2.95
var. epoch	2443481 3. December 1977, 12:00:00 UT
next max light	2451811.8 24. September 2000, 07:12:00 UT

double/multiple star system information:

source of data: 19

magnitude difference between brightest and second brightest component

0.4

component	magnitude	spectral class	catalogue(s)/name(s)
A	3.27	A0	a Doradus, HR 1465, HD 29305, SAO 233564
B	10.1	-

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
30	GCVS, 4th edition
Kholopov, P.N., et al., General Catalogue of Variable Stars, fourth edition, Moscow: Nauka Publishing House, 1985-88
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: 4h 32min 54.798sec	DEC: -55° 8' 51.78''	±0.009 arcsec
position (2000.72)	RA: 4h 34min 1sec	DEC: -55° 2' 37''	JD: 2451809.24
position (J2000)	RA: 4h 33min 59.821sec	DEC: -55° 2' 42.14''
proper motion B1950 (FK4)	RA: 0.0061 arcsec/a	DEC: 0.001 arcsec/a	±0.002 arcsec/a in RA ±0.002 arcsec/a in DEC
proper motion J2000 (FK5)	RA: 0.0064 arcsec/a	DEC: -0.003 arcsec/a
source of proper motion data	Determined by source catalog

magnitude:

visual	3.5 (accuracy: 2 decimals)
source of visual magnitude data	Taken from the "Henry Draper Catalogue".

spectral information:

spectral class	A0p
source of spectral data	Taken from the Henry Draper Catalogue or no spectrum in source catalog.

catalogues

source catalogue	FK4, catalogue number: 171
Durchmusterung	CP-55 663
Boss General Catalogue	5600
Henry Draper Catalogue	29305

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

position and proper motion:

position (J2000)	RA: 4h 34min	DEC: -55° 3'
proper motion (J2000)	RA: 0.051 arcsec/a	DEC: -0.004 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
AB	1956	24	°	''	3.8	4.2	A0IIIs	B 2092
AB-C	1836	5	108°	82.3''	3.5	10	-	HJ 3668
	1965		97°	77.6''

discoverer information:

discoverer code	discoverer	reference
B 2092	Bos, W.H. van den	-
HJ 3668	Herschel, J.	-

notes:

note	Alpha Dor. P = 12yr., a = 0.20", motion direct.

data from 4th Catalog of Orbits of Visual Binaries (Worley+, 1983)

position:

position (B1900)

RA: 4h 31.8min

DEC: -55° 15'

magnitudes, spectral classes, orbital elements:

author:	G.F.G. Knipe
date of observation:	1966
magnitude of component A:	3.8
magnitude of component B:	3.8
spectral class component B:	A0III
spectral class component B:	A0III
period [y]:	13
semi-major axis [arcsec]:	0.212
inclination [deg]:	54.1
node [deg]:	118.7
eccentricity:	0.84
time of periastron passage:	1962.6
dates of ephemeris:	1967-1974
grade:	reliable
reference:	Repub. Obs. Circ. 7, 113; 1966.

other name(s)

B 2092, Alpha Dor

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

position:

position (equinox 1950.0)

RA: 4h 32min 54.8sec

DEC: -55° 8' 52''

variability informations:

variability type	ACV	rotating variable star
magnitute at max. brightness	3.26
magnitute at min. brightness	3.3
photometric system	visual, photovisual or Johnson's V
epoch for maximum light [JD]	2443481.5 4. December 1977, 00:00:00 UT
period [d]	2.95
next maximum light [JD]	2451809.35 21. September 2000, 20:24:00 UT
rising time	50 % of period

spectral information

spectral class

A0IIIp(Si)

references

to a study	Vol. I GCVS (see Kholopov et al. 1985-1988)
to a chart/photograph	no chart is avaible, but the star is contained in the 'Cape Photographic Durchmusterung'

miscanellous

ID in the GCVS catalogue	33/9001
constellation	Dorado
notes on existence	The star is equivalent to '0339002 bet'.
There are notes in published catalog.

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.