CF Ursae Majoris
catalogues and names
catalogues and names | CF UMa |
data from Combined General Catalogue of Variable Stars (Vol. I-III) (Kholopov+ 1998)
position:
position (equinox 1950.0) | RA: 11h 50min 6.2sec | DEC: +38° 4' 39'' |
variability informations:
variability type | UV: | eruptive variable star |
magnitute at max. brightness | 8.5 | |
magnitute at min. brightness | 12: | |
photometric system | visual, photovisual or Johnson's V |
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 '' |
miscanellous
ID in the GCVS catalogue | 83/107 |
constellation | Ursa Major |
notes on existence | The star is equivalent to '8 CG UMa'. |
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. |