catalogues and names

The Bright Star Catalogue, 5th Revised Ed. (Preliminary Version)

SKY2000 - Master Star Catalog

Smithsonian Astrophysical Observatory Star Catalog

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

catalogues and names

catalogues and names

S Cru, HR 4895, HD 112044, SAO 240362, CP -57 5776

data from The Bright Star Catalogue, 5th Revised Ed. (Preliminary Version) (Hoffleit+, 1991)

position, motion, parallax:

position (J2000)	RA: 12h 54min 22sec	DEC: -58° 25' 50''
position (2000.72)	RA: 12h 54min 25sec	DEC: -58° 26' 4''
position (B1900)	RA: 12h 48min 26.9sec	DEC: -57° 53' 15''
proper motion (J2000)	RA: -0.014 arcsec/a	DEC: -0.001 arcsec/a
radial velocity	-7 km/s
galactic coordinates	longitude: 303.32°	latitude: 4.44°

magnitude

visual magnitude

6.58 (V on UBV Johnson system)

spectral / color information

spectral class	F7Ib-II
B-V-magnitude	0.76
U-B-magnitude	0.6

note (category: spectra):

Also classified F6-G1Ib-II.

variability information

variable star identification

S Cru

note (category: variability):

CDelta 6.23 - 6.92V, 4.68997d.

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

position, motion, parallax:

position (J2000)	RA: 12h 54min 21.966sec	DEC: -58° 25' 49.98''	±0.19 arcsec	source: 16
position (2000.72)	RA: 12h 54min 25sec	DEC: -58° 26' 4''	JD: 2451806.24
proper motion (J2000)	RA: -0.0018 arcsec/a	DEC: 0.003 arcsec/a		source: 25
radial velocity	-7 km/s			source: 25
galactic coord. (B1950)	longitude: 303.32°	latitude: 4.44°

magnitude:

visual	6.22 (observed)	source: 30
photovisual	6.6	source: 16

spectral information:

spectral class	G0		source: 96
Morgan-Keenan	F7Ib-II		source: 25
B-magnitude	7.34 ±0.05	B-V-magnitude	0.76
U-magnitude	7.94 ±0.05	U-B-magnitude	0.6

variability information:

source of data: 30

variability type	111
var. amplitude	0.7
var. period	4.69
var. epoch	2434974 19. August 1954, 12:00:00 UT
next max light	2451806.41 18. September 2000, 21:50:24 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
25	Bright Star Catalogue, 5th edition
Hoffleit, D. and Warren, W.H. Jr., The Bright Star Catalogue, 5th Revised Edition, Version 2, 1994
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: 12h 51min 23.582sec	DEC: -58° 9' 34.04''	±0.057 arcsec
position (2000.72)	RA: 12h 54min 25sec	DEC: -58° 26' 3''	JD: 2451806.24
position (J2000)	RA: 12h 54min 21.984sec	DEC: -58° 25' 50.04''
proper motion B1950 (FK4)	RA: -0.0013 arcsec/a	DEC: -0.005 arcsec/a	±0.013 arcsec/a in RA ±0.01 arcsec/a in DEC
proper motion J2000 (FK5)	RA: -0.0018 arcsec/a	DEC: -0.001 arcsec/a
source of proper motion data	Determined by source catalog

magnitude:

visual	6.4 (accuracy: 1 decimal)
source of visual magnitude data	Source cited in source catalog introduction.

spectral information:

spectral class	G0
source of spectral data	Taken from the Henry Draper Catalogue or no spectrum in source catalog.

remarks for duplicity and variability

Variable star in visual magnitude in source catalog

catalogues

source catalogue	GC, catalogue number: 17509
Durchmusterung	CP-57 5776
Boss General Catalogue	17509
Henry Draper Catalogue	112044

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

position:

position (equinox 1950.0)

RA: 12h 51min 23.6sec

DEC: -58° 9' 34''

variability informations:

variability type	DCEP	pulsating variable star
magnitute at max. brightness	6.22
magnitute at min. brightness	6.92
photometric system	visual, photovisual or Johnson's V
epoch for maximum light [JD]	2434973.52 19. August 1954, 00:28:48 UT
period [d]	4.68997
next maximum light [JD]	2451810.5123 23. September 2000, 00:17:43 UT
rising time	34 % of period

spectral information

spectral class

F6-G1Ib-II

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	30/2
constellation	Crux
notes on existence	The star is equivalent to '0300003 T'.

variability type description

variability type

description

DCEP

These are the classical cepheids, or Delta Cep-type variables. Comparatively young objects that have left the main sequence and evolved into the instability strip of the Hertzsprung-Russell (H-R) diagram, they obey the well-known Cepheid period-luminosity relation and belong to the young disk population. DCEP stars are present in open clusters. They display a certain relation between the shapes of their light curves and their periods.