psi Virginis

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

position, motion, parallax:

position (J2000)	RA: 12h 54min 21.2sec	DEC: -9° 32' 20''
position (B1900)	RA: 12h 49min 9.1sec	DEC: -8° 59' 45''
proper motion (J2000)	RA: -0.024 arcsec/a	DEC: -0.015 arcsec/a
radial velocity	18 km/s note: suspected variable radial velocity
trigonometric parallax	0.021 arcsec
galactic coordinates	longitude: 304.14°	latitude: 53.33°

magnitude

visual magnitude

4.79
(V on UBV Johnson system)

spectral / color information

spectral class	M3-IIICa-1
B-V-magnitude	1.6
U-B-magnitude	1.53
R-I-magnitude
IR-note	object is infrared source (NASA merged infrared catalogue, Schmitz et al., 1978)

note (category: spectra):

Ultraviolet FeII emission.

variability information

variable star identification

Psi Vir

note (category: variability):

Lb 4.7 - 4.8V.

double/multiple star system information

separation	0 arcsec
mag difference (of double or brightest multiple)	3.3
note	doublicity discoverd by occultation

note (category: double and multiple data):

Close binary, sep. 0.040", unresolved by speckle interferometry. If companion on main sequence, the inferred spectral type is F6V.

miscellaneous information

note (category: stellar radii or diameters):

Occultation diam. = 0.00492 - 0.0065".

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

position, motion, parallax:

position (J2000)	RA: 12h 54min 21.163sec	DEC: -9° 32' 20.28''	±0.06 arcsec	source: 15
proper motion (J2000)	RA: -0.0016 arcsec/a	DEC: -0.015 arcsec/a		source: 25
radial velocity	18 km/s			source: 25
trigonometric parallax	0.021 arcsec		±0.002 arcsec	source: 25
galactic coord. (B1950)	longitude: 304.15°	latitude: 53.33°

magnitude:

visual	4.7 (observed)	source: 31
photovisual	4.9	source: 2
photographic	6.3	source: 2

spectral information:

spectral class	M0		source: 96
Morgan-Keenan	M3-IIICa-1		source: 25
B-magnitude	6.39 ±0.05	B-V-magnitude	1.6
U-magnitude	7.92 ±0.05	U-B-magnitude	1.53

variability information:

source of data: 30

variability type	171
var. amplitude	0.23

double/multiple star system information:

source of data: 25

separation between brightest and second brightest component	0 arcsec
magnitude difference between brightest and second brightest component	3.3

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
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
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: 12h 51min 44.944sec	DEC: -9° 16' 3.92''	±0.006 arcsec
position (J2000)	RA: 12h 54min 21.167sec	DEC: -9° 32' 20.19''
proper motion B1950 (FK4)	RA: -0.0019 arcsec/a	DEC: -0.02 arcsec/a	±0.001 arcsec/a in RA ±0.001 arcsec/a in DEC
proper motion J2000 (FK5)	RA: -0.0016 arcsec/a	DEC: -0.014 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 the "Henry Draper Catalogue".

spectral information:

spectral class	M3
source of spectral data	Taken from the Henry Draper Catalogue or no spectrum in source catalog.

catalogues

source catalogue	FK4, catalogue number: 1335
Durchmusterung	BD-08 3449
Boss General Catalogue	17516
Henry Draper Catalogue	112142

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

position:

position (equinox 1950.0)

RA: 12h 51min 44.9sec

DEC: -9° 16' 4''

variability informations:

variability type	LB	pulsating variable star
magnitute at max. brightness	4.73
magnitute at min. brightness	4.96
photometric system	visual, photovisual or Johnson's V

spectral information

spectral class

M3III

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 'Bonner Durchmusterung'

miscanellous

ID in the GCVS catalogue	86/9023
constellation	Virgo
notes on existence	The star is equivalent to '0869024 ome'.
There are notes in published catalog.

variability type description

variability type

description

Slow irregular variables. The light variations of these stars show no evidence of periodicity, or any periodicity present is very poorly defined and appears only occasionally. Like for the type I, stars are often attributed to this type because of being insufficiently studied.
Many type L variables are really semiregulars or belong to other types.

LB
Slow irregular variables of late spectral types (K, M, C, S); as a rule, they are giants (CO Cyg). This type is also ascribed, in the GCVS, to slow red irregular variables in the case of unknown spectral types and luminosities.

LC
Irregular variable supergiants of late spectral types having amplitudes of about 1 mag in V (TZ Cas).

catalogues and names	y Vir, psi Vir, 40 Vir, HR 4902, HD 112142, SAO 139033, BD -8 3449, FK5: 1335
constellation	Virgo