catalogues and names

Smithsonian Astrophysical Observatory Star Catalog

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

catalogues and names

catalogues and names

AD Leo, SAO 81292, BD +20 2465

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

position and proper motion:

position (B1950)	RA: 10h 16min 53.9sec	DEC: +20° 7' 19.18''	±0.041 arcsec
position (2000.73)	RA: 10h 19min 41sec	DEC: +19° 52' 1''	JD: 2451812.24
position (J2000)	RA: 10h 19min 36.357sec	DEC: +19° 52' 12.03''
proper motion B1950 (FK4)	RA: -0.0346 arcsec/a	DEC: -0.049 arcsec/a	±0.007 arcsec/a in RA ±0.007 arcsec/a in DEC
proper motion J2000 (FK5)	RA: -0.0346 arcsec/a	DEC: -0.043 arcsec/a
source of proper motion data	Determined by source catalog

magnitude:

visual	10 (accuracy: 1 decimal)
source of visual magnitude data	Based on Durchmusterung magnitudes and visual estimates

spectral information:

spectral class	M4e
source of spectral data	Taken from the Henry Draper Catalogue or no spectrum in source catalog.

catalogues

source catalogue	GC, catalogue number: 14167
Durchmusterung	BD+20 2465
Boss General Catalogue	14167

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

position:

position (equinox 1950.0)

RA: 10h 16min 53.9sec

DEC: +20° 7' 19''

variability informations:

variability type	UV	eruptive variable star
magnitute at max. brightness	8.07
magnitute at min. brightness	11
photometric system

spectral information

spectral class

M4.5Ve

references

to a study	Vol. II GCVS
to a chart/photograph	Vol. I GCVS (see Kholopov et al. 1985-1988)

miscanellous

ID in the GCVS catalogue	46/58
constellation	Leo
notes on existence	The star is equivalent to '0460059 AE'.
There are notes in published catalog.

variability type description

variability type

description

UV

Eruptive variables of the UV Ceti type, these are K Ve-M Ve stars sometimes displaying flare activity with amplitudes from several tenths of a magnitude up to 6 mag in V. The amplitude is considerably greater in the ultraviolet spectral region. Maximum light is attained in several seconds or dozens of seconds after the beginning of a flare; the star returns to its normal brightness in several minutes or dozens of minutes.