catalogues and names

Smithsonian Astrophysical Observatory Star Catalog

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

catalogues and names

catalogues and names

V0820 Cen, SAO 205326, CD -37 9248

data from Smithsonian Astrophysical Observatory Star Catalog (SAO Staff 1966; USNO, ADC 1990)

position and proper motion:

position (B1950)	RA: 14h 10min 54.147sec	DEC: -37° 51' 46.54''	±0.032 arcsec
position (2000.72)	RA: 14h 13min 59sec	DEC: -38° 5' 58''	JD: 2451809.28
position (J2000)	RA: 14h 13min 56.315sec	DEC: -38° 5' 46.84''
proper motion B1950 (FK4)	RA: -0.0021 arcsec/a	DEC: -0.016 arcsec/a	±0.018 arcsec/a in RA ±0.018 arcsec/a in DEC
proper motion J2000 (FK5)	RA: -0.002 arcsec/a	DEC: -0.012 arcsec/a
source of proper motion data	Determined by source catalog

magnitude:

visual	8.8 (accuracy: 2 decimals)
source of visual magnitude data	Determined by source catalog.
photographic	10.1 (accuracy: 2 decimals)
source of photographic magnitude data	Determined by source catalog.

spectral information:

spectral class	G8
source of spectral data	Classified by G. G. Cillie.

catalogues

source catalogue	Cape Annals 18, catalogue number: 6860
Durchmusterung	CD-37 9248

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

position:

position (equinox 1950.0)

RA: 14h 10min 54.1sec

DEC: -37° 51' 47''

variability informations:

variability type	RV	pulsating variable star
magnitute at max. brightness	8.42
magnitute at min. brightness	<10.1
photometric system	visual, photovisual or Johnson's V
epoch for maximum light [JD]	2443325 30. June 1977, 12:00:00 UT
period [d]	150
next maximum light [JD]	2451875 26. November 2000, 12:00:00 UT

spectral information

spectral class

K0e

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 'Cordoba Durchmusterung'

miscanellous

ID in the GCVS catalogue	19/820
constellation	Centaurus
notes on existence	The star is equivalent to '0190821 V0821'.
There are notes in published catalog.

variability type description

variability type

description

RV

Variables of the RV Tauri type. These are radially pulsating supergiants having spectral types F-G at maximum light and K-M at minimum. The light curves are characterized by the presence of double waves with alternating primary and secondary minima that can vary in depth so that primary minima may become secondary and vice versa. The complete light amplitude may reach 3-4 mag in V. Periods between two adjacent primary minima (usually called formal periods) lie in the range 30-150 days (these are the periods appearing in the Catalogue). Two subtypes, RVA and RVB, are recognized: RVA RV Tauri variables that do not vary in mean magnitude (AC Her); RVB RV Tauri variables that periodically (with periods from 600 to 1500 days and amplitudes up to 2 mag in V) vary in mean magnitude (DF Cyg, RV Tau).