catalogues and names

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

SKY2000 - Master Star Catalog

Smithsonian Astrophysical Observatory Star Catalog

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

catalogues and names

catalogues and names	r Vir, rho Vir, 30 Vir, HR 4828, HD 110411, SAO 100211, BD +11 2485, FK5: 1326
constellation	Virgo

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

position, motion, parallax:

position (J2000)	RA: 12h 41min 53.1sec	DEC: +10° 14' 8''
position (2000.73)	RA: 12h 41min 55sec	DEC: +10° 13' 54''
position (B1900)	RA: 12h 36min 49.3sec	DEC: +10° 47' 12''
proper motion (J2000)	RA: 0.084 arcsec/a	DEC: -0.091 arcsec/a
radial velocity	2 km/s note: spectroscopic binaries
rotational velocity	173 km/s (uncertain) (variable)
galactic coordinates	longitude: 294.88°	latitude: 72.96°

magnitude

visual magnitude

4.88 (V on UBV Johnson system)

spectral / color information

spectral class	A0V
B-V-magnitude	0.09
U-B-magnitude	0.03
R-I-magnitude

variability information

variable star identification

Rho Vir

note (category: variability):

Delta Sct? Amp. 0.02V, cycles 0.02 to 0.10d.

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

position, motion, parallax:

position (J2000)	RA: 12h 41min 53.062sec	DEC: +10° 14' 8.14''	±0.06 arcsec	source: 15
position (2000.73)	RA: 12h 41min 55sec	DEC: +10° 13' 54''	JD: 2451810.88
proper motion (J2000)	RA: 0.0057 arcsec/a	DEC: -0.09 arcsec/a		source: 25
radial velocity	2 km/s			source: 25
galactic coord. (B1950)	longitude: 294.91°	latitude: 72.96°

magnitude:

visual	4.88 (observed)	source: 25
photovisual	5	source: 2

spectral information:

spectral class	A0		source: 96
Morgan-Keenan	A0V		source: 25
B-magnitude	4.97 ±0.05	B-V-magnitude	0.09
U-magnitude	5 ±0.05	U-B-magnitude	0.03

variability information:

source of data: 27

variability type	150
var. amplitude	0

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
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: 12h 39min 21.18sec	DEC: +10° 30' 39.16''	±0.005 arcsec
position (2000.73)	RA: 12h 41min 55sec	DEC: +10° 13' 58''	JD: 2451810.88
position (J2000)	RA: 12h 41min 53.075sec	DEC: +10° 14' 8.13''
proper motion B1950 (FK4)	RA: 0.0057 arcsec/a	DEC: -0.095 arcsec/a	±0.001 arcsec/a in RA ±0.001 arcsec/a in DEC
proper motion J2000 (FK5)	RA: 0.0058 arcsec/a	DEC: -0.091 arcsec/a
source of proper motion data	Determined by source catalog

magnitude:

visual	5 (accuracy: 2 decimals)
source of visual magnitude data	Taken from the "Henry Draper Catalogue".

spectral information:

spectral class	A0
source of spectral data	Taken from the Henry Draper Catalogue or no spectrum in source catalog.

catalogues

source catalogue	FK4, catalogue number: 1326
Durchmusterung	BD+11 2485
Boss General Catalogue	17276
Henry Draper Catalogue	110411

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

position:

position (equinox 1950.0)

RA: 12h 39min 21.2sec

DEC: +10° 30' 39''

variability informations:

variability type	DSCTC	pulsating variable star
magnitute at max. brightness	4.88
magnitute amplitude	0.02
photometric system	visual, photovisual or Johnson's V

references

to a study	E.Antonello, L.Mantegazza, AsAp Suppl 49,709,1982.
to a chart/photograph	no chart is avaible, but the star is contained in the 'Bonner Durchmusterung'

miscanellous

ID in the GCVS catalogue	86/9017
constellation	Virgo
notes on existence	The star is equivalent to '67295'.

variability type description

variability type

description

DSCTC

Variables of the Delta Scuti type. These are pulsating variables of spectral types A0-F5 III-V displaying light amplitudes from 0.003 to 0.9 mag in V (usually several hundredths of a magnitude) and periods from 0.01 to 0.2 days. The shapes of the light curves, periods, and amplitudes usually vary greatly. Radial as well as nonradial pulsations are observed. The variability of some members of this type appears sporadically and sometimes completely ceases, this being a consequence of strong amplitude modulation with the lower value of the amplitude not exceeding 0.001 mag in some cases. The maximum of the surface layer expansion does not lag behind the maximum light for more than 0.1 periods. DSCT stars are representatives of the galactic disk (flat component) and are phenomenologically close to the SX Phe variables. DSCTC Low amplitude group of Delta Sct variables (light amplitude <0.1 mag in V). The majority of this type's representatives are stars of luminosity class V; objects of this subtype generally are representative of the Delta Sct variables in open clusters.