HT Virginis

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

position, motion, parallax:

magnitude:

spectral information:

variability information:

source of data: 27

variability type	330
var. amplitude	0.4

double/multiple star system information:

source of data: 19

separation between brightest and second brightest component	0.6 arcsec
magnitude difference between brightest and second brightest component	0.4
position angle	166 °

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
20	Catalogue of Homogeneous Means in the UBV System
Mermilliod, J.C., Catalogue of Homogeneous Means in the UBV System, Institut d'Astronomie, Universite de Lausanne, 1994
27	Catalog of Red Magnitudes (CRM)
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: 13h 43min 36.087sec	DEC: +5° 21' 56.36''	ą0.035 arcsec
position (2000.73)	RA: 13h 46min 9sec	DEC: +5° 6' 44''	JD: 2451810.12
position (J2000)	RA: 13h 46min 6.86sec	DEC: +5° 6' 55.1''
proper motion B1950 (FK4)	RA: -0.0059 arcsec/a	DEC: -0.046 arcsec/a	ą0.006 arcsec/a in RA ą0.005 arcsec/a in DEC
proper motion J2000 (FK5)	RA: -0.0057 arcsec/a	DEC: -0.042 arcsec/a
source of proper motion data	Determined by source catalog

magnitude:

visual	7.2 (accuracy: 2 decimals)
source of visual magnitude data	Taken from Harvard or San Luis photometry.

spectral information:

spectral class	G0
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

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

position and proper motion:

position (J2000)	RA: 13h 46.1min	DEC: +5° 7'
proper motion (J2000)	RA: -0.1 arcsec/a	DEC: -0.035 arcsec/a

double/multiple star system information:

discoverer information:

discoverer code	discoverer	reference
STF1781	Struve, F.G.W.	-

notes:

note	P = 274yr., a = 1.01", motion direct. One component is a W UMa-type eclipsing binary.

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

position:

position (B1900)

RA: 13h 41.1min

DEC: +5° 37'

magnitudes, spectral classes, orbital elements:

notes

One component is a class W eclipsing binary.