VX Puppis

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

position, motion, parallax:

position (J2000)	RA: 7h 32min 36.656sec	DEC: -21° 55' 49.51''	ą0.18 arcsec	source: 16
position (2000.72)	RA: 7h 32min 39sec	DEC: -21° 55' 56''	JD: 2451806.31
proper motion (J2000)	RA: 0.0001 arcsec/a	DEC: -0.001 arcsec/a		source: 16
galactic coord. (B1950)	longitude: 237.02°	latitude: -1.31°

magnitude:

visual	7.73 (observed)	source: 30
photovisual	8.5	source: 16

spectral information:

spectral class	F5		source: 96
Morgan-Keenan	F3IV		source: 23
B-magnitude	8.46 ą0.02	B-V-magnitude	0.49

variability information:

source of data: 30

variability type	114
var. amplitude	0.86
var. period	3.01
var. epoch	2436238 3. February 1958, 12:00:00 UT
next max light	2451808.73 21. September 2000, 05:31:12 UT

sources:

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
23	Michigan Catalog of 2-Dimensional Spectral Types, Volume IV
Houk, N. and Smith-Moore, D., Michigan Catalogue of 2-Dimensional Spectral Types for the HD Stars, Vol. 4, (Zones -25 to -12 Degrees), Ann Arbor: The University of Michigan, 1988
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: 7h 30min 27.661sec	DEC: -21° 49' 20''	ą0.031 arcsec
position (2000.72)	RA: 7h 32min 39sec	DEC: -21° 55' 55''	JD: 2451806.31
position (J2000)	RA: 7h 32min 36.764sec	DEC: -21° 55' 50.6''
proper motion B1950 (FK4)	RA: 0.0013 arcsec/a	DEC: -0.02 arcsec/a	ą0.018 arcsec/a in RA ą0.013 arcsec/a in DEC
proper motion J2000 (FK5)	RA: 0.0017 arcsec/a	DEC: -0.017 arcsec/a
source of proper motion data	Determined by source catalog

magnitude:

visual	8.7 (accuracy: 1 decimal)
source of visual magnitude data	Taken from AGK1.

spectral information:

spectral class	F5
source of spectral data	Taken from the HD with M stars reclassified by Miss Cannon.

catalogues

source catalogue	Yale Transactions 13 Part I, catalogue number: 3054
Durchmusterung	BD-21 1997
Henry Draper Catalogue	60219

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

position:

position (equinox 1950.0)

RA: 7h 30min 27.7sec

DEC: -21° 49' 20''

variability informations:

variability type	CEP(B)	pulsating variable star
magnitute at max. brightness	7.73
magnitute at min. brightness	8.59
photometric system	visual, photovisual or Johnson's V
epoch for maximum light [JD]	2436237.953 3. February 1958, 10:52:19 UT
period [d]	3.01087
next maximum light [JD]	2451807.16177 19. September 2000, 15:52:57 UT
rising time	50 % of period

spectral information

spectral class

F5-F8

references

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

miscanellous

ID in the GCVS catalogue	68/42
constellation	Puppis
notes on existence	The star is equivalent to '0680043 VY'.
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.