BP Circini

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

position, motion, parallax:

position (J2000)	RA: 14h 46min 42.005sec	DEC: -61° 27' 42.91''	ą0.18 arcsec	source: 16
position (2000.72)	RA: 14h 46min 45sec	DEC: -61° 27' 54''	JD: 2451806.31
proper motion (J2000)	RA: -0.0006 arcsec/a	DEC: -0.001 arcsec/a		source: 16
galactic coord. (B1950)	longitude: 316.25°	latitude: -1.61°

magnitude:

visual	7.54 (observed)	source: 30
photovisual	7.7	source: 16

spectral information:

spectral class	F2		source: 96
Morgan-Keenan	F2/3II		source: 10
B-magnitude	8.36 ą0.02	B-V-magnitude	0.75
U-magnitude	8.7 ą0.02	U-B-magnitude	0.34

variability information:

source of data: 30

variability type	113
var. amplitude	0.33
var. period	2.4

sources:

10	Michigan Catalog of 2-Dimensional Spectral Types for the HD Stars, Volumes I-III
Houk, N., and A.P. Cowley, Michigan Catalogue of 2-Dimensional Spectral Types for the HD Stars, Vol. 1., (Zones -89 to -53 Degrees), Ann Arbor: The University of Michigan, 1975, and Houk, N., Michigan Catalogue of 2-Dimensional Spectral Types for the HD Stars, Vol. 2., (Zones -52 to -40 Degrees), Ann Arbor: The University of Michigan, 1978, and Houk, N., Michigan Catalogue of 2-Dimensional Spectral Types for the HD Stars, Vol. 3., (Zones -40 to -26 Degrees), Ann Arbor: The University of Michigan, 1982
16	PPM North and PPM South Catalogs and PPM Supplement
Roser, S., and U. Bastian, "Catalogue of Positions and Proper Motions," A&AS, Vol. 74, p. 449, 1988, and Bastian, U., et al., "Catalogue of Positions and Proper Motions - South," 1993
30	GCVS, 4th edition
Kholopov, P.N., et al., General Catalogue of Variable Stars, fourth edition, Moscow: Nauka Publishing House, 1985-88
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: 14h 42min 47.732sec	DEC: -61° 15' 8.21''	ą0.014 arcsec
position (2000.72)	RA: 14h 46min 46sec	DEC: -61° 27' 53''	JD: 2451806.31
position (J2000)	RA: 14h 46min 42.006sec	DEC: -61° 27' 42.2''
proper motion B1950 (FK4)	RA: -0.0002 arcsec/a	DEC: 0.006 arcsec/a	ą0.006 arcsec/a in RA ą0.006 arcsec/a in DEC
proper motion J2000 (FK5)	RA: -0.0011 arcsec/a	DEC: 0.01 arcsec/a
source of proper motion data	Determined by source catalog

magnitude:

visual	7.6 (accuracy: 1 decimal)
source of visual magnitude data	Determined by source catalog.
photographic	8.1 (accuracy: 1 decimal)
source of photographic magnitude data	Determined by source catalog.

spectral information:

spectral class	F2
source of spectral data	Taken from the Henry Draper Catalogue or no spectrum in source catalog.

catalogues

source catalogue	Cape Annals 20, catalogue number: 4403
Durchmusterung	CP-60 5511
Henry Draper Catalogue	129708

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

position:

position (equinox 1950.0)

RA: 14h 42min 47.7sec

DEC: -61° 15' 8''

variability informations:

variability type	CEP	pulsating variable star
magnitute at max. brightness	7.54
magnitute amplitude	0.33
photometric system	visual, photovisual or Johnson's V
period [d]	2.3984
rising time	42 % of period

spectral information

spectral class

F2/3II

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 'Cape Photographic Durchmusterung'

miscanellous

ID in the GCVS catalogue	23/93
constellation	Circinus
notes on existence	The star is equivalent to '0230094 BQ'.

variability type description

variability type

description

CEP

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.