AP Velorum
catalogues and names
catalogues and names | AP Vel |
data from Combined General Catalogue of Variable Stars (Vol. I-III) (Kholopov+ 1998)
position:
position (equinox 1950.0) | RA: 8h 38min 1sec | DEC: -43° 41' 0'' | ± 1 sec / ± 0.1 arcmin |
variability informations:
variability type | CEP(B) | pulsating variable star |
magnitute at max. brightness | 9.49 | |
magnitute at min. brightness | 10.48 | |
photometric system | visual, photovisual or Johnson's V | |
epoch for maximum light [JD] | 2434900.805 7. June 1954, 07:19:12 UT |
|
period [d] | 3.12776 | |
next maximum light [JD] | 2451806.3478 18. September 2000, 20:20:50 UT |
|
rising time | 33 % of period |
spectral information
spectral class | F9 |
references
to a study | Vol. I GCVS (see Kholopov et al. 1985-1988) |
to a chart/photograph | Vol. I GCVS (see Kholopov et al. 1985-1988) |
miscanellous
ID in the GCVS catalogue | 85/69 |
constellation | Vela |
notes on existence | The star is equivalent to '0850070 AQ'. |
There are notes in published catalog. |
variability type description
variability type | description |
CEP(B) | Cepheids. Radially pulsating, high luminosity (classes Ib-II) variables with periods in the range of 1-135 days and amplitudes from several hundredths to 2 mag in V (in the B band, the amplitudes are greater). Spectral type at maximum light is F; at minimum, the types are G-K. The longer the period of light variation,the later is the spectral type. The maximum of the surface-layer expansion velocity almost coinciding with maximum light. CEP(B) Cepheids (TU Cas, V 367 Sct) displaying the presence of two or more simultaneously operating pulsation modes (usually the fundamental tone with the period P0 and the first overtone P1). The periods P0 are in the range from 2 to 7 days, with the ratio P1/P0 approx. 0.71. |