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

CU Vir, HR 5313, HD 124224, SAO 120339, BD +3 2867, FK5: 3127, WDS 14123+0225

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

position, motion, parallax:

position (J2000)	RA: 14h 12min 15.8sec	DEC: +2° 24' 34''
position (2000.72)	RA: 14h 12min 18sec	DEC: +2° 24' 22''
position (B1900)	RA: 14h 7min 12sec	DEC: +2° 52' 48''
proper motion (J2000)	RA: -0.042 arcsec/a	DEC: -0.026 arcsec/a
radial velocity	-2 km/s note: spectroscopic binaries
rotational velocity	123 km/s (uncertain) (variable)
trigonometric parallax	0.009 arcsec
galactic coordinates	longitude: 344.43°	latitude: 58.61°

magnitude

visual magnitude

5.01 (V on UBV Johnson system)

spectral / color information

spectral class	A0VpSi
B-V-magnitude	-0.12
U-B-magnitude	-0.42
R-I-magnitude

variability information

variable star identification

CU Vir

note (category: variability):

Alpha CV 4.98 - 5.05V, 0.52067688d. Same period spectrum var. Si a major source of photometric variability and suggests starspots related to magnetic field. SiII varies out of phase with HeI. Period unusually short for star with peculiar A-type spectrum.

double/multiple star system information

separation	59.9 arcsec
mag difference (of double or brightest multiple)	6.5

note (category: double and multiple data):

Optical companion.

miscellaneous information

note (category: group membership):

Member of Pleiades group.

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

position, motion, parallax:

position (J2000)	RA: 14h 12min 15.799sec	DEC: +2° 24' 34.03''	±0.2 arcsec	source: 52
position (2000.72)	RA: 14h 12min 18sec	DEC: +2° 24' 22''	JD: 2451809.25
proper motion (J2000)	RA: -0.0029 arcsec/a	DEC: -0.025 arcsec/a		source: 25
radial velocity	-2 km/s			source: 25
trigonometric parallax	0.009 arcsec		±0.001 arcsec	source: 25
galactic coord. (B1950)	longitude: 344.44°	latitude: 58.61°

magnitude:

visual	4.9 (observed)	source: 31
photovisual	4.9	source: 2
photographic	4.7	source: 16

spectral information:

spectral class	A0		source: 96
Morgan-Keenan	A0VpSi		source: 25
B-magnitude	4.89 ±0.05	B-V-magnitude	-0.12
U-magnitude	4.47 ±0.05	U-B-magnitude	-0.42

variability information:

source of data: 30

variability type	160
var. amplitude	0.15
var. period	0.52
var. epoch	2441456 18. May 1972, 12:00:00 UT
next max light	2451809.72 22. September 2000, 05:16:48 UT

double/multiple star system information:

source of data: 19

separation between brightest and second brightest component	59.9 arcsec
magnitude difference between brightest and second brightest component	7
position angle	212 °

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
16	PPM North and PPM South Catalogs and PPM Supplement
Roser, S., and U. Bastian, "Catalogue of Positions and Proper Motions," A&AS, Vol. 74, p. 449, 1988, and Bastian, U., et al., "Catalogue of Positions and Proper Motions - South," 1993
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
31	CRM' (non-GCVS variable data)
Warren, W.H. Jr., Northern Hemisphere Catalog of Red Magnitudes, 1994
52	PPMN-HP subset
PPMN Star Catalogue (Reference 16) High-Precision Subset (Code H)
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 9min 43.75sec	DEC: +2° 38' 38.06''	±0.019 arcsec
position (2000.72)	RA: 14h 12min 18sec	DEC: +2° 24' 23''	JD: 2451809.25
position (J2000)	RA: 14h 12min 15.763sec	DEC: +2° 24' 33.75''
proper motion B1950 (FK4)	RA: -0.0034 arcsec/a	DEC: -0.031 arcsec/a	±0.003 arcsec/a in RA ±0.003 arcsec/a in DEC
proper motion J2000 (FK5)	RA: -0.0032 arcsec/a	DEC: -0.028 arcsec/a
source of proper motion data	Determined by source catalog

magnitude:

visual	4.9 (accuracy: 2 decimals)
source of visual magnitude data	Taken from Harvard or San Luis photometry.

spectral information:

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

remarks for duplicity and variability

Double star in Aitken's Double Star Catalogue (Aitken 1932)

catalogues

source catalogue	GC, catalogue number: 19157
Durchmusterung	BD+03 2867
Boss General Catalogue	19157
Henry Draper Catalogue	124224

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

position and proper motion:

position (J2000)	RA: 14h 12.3min	DEC: +2° 25'
proper motion (J2000)	RA: -0.042 arcsec/a	DEC: -0.026 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
-	1905	4	214°	62.6''	4.9	11.9	A0V	HJ 3343
	1959		212°	59.9''

discoverer information:

discoverer code	discoverer	reference
HJ 3343	Herschel, J.	-

notes:

note	A is the Alpha CVn-type variable CU Vir.

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

position:

position (equinox 1950.0)

RA: 14h 9min 43.8sec

DEC: +2° 38' 38''

variability informations:

variability type	ACV	rotating variable star
magnitute at max. brightness	4.92
magnitute at min. brightness	5.07
photometric system	visual, photovisual or Johnson's V
epoch for maximum light [JD]	2441455.685 18. May 1972, 04:26:24 UT
period [d]	0.5206794
next maximum light [JD]	2451809.394869 21. September 2000, 21:28:37 UT
rising time	50 % of period

spectral information

spectral class

A0Vp(Si)

references

to a study	the main characteristics of the star was determined by the authors themselves
to a chart/photograph	no chart is avaible, but the star is contained in the 'Bonner Durchmusterung'

miscanellous

ID in the GCVS catalogue	86/121
constellation	Virgo
notes on existence	The star is equivalent to '0860122 CV'.
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.