catalogues and names

SKY2000 - Master Star Catalog

Smithsonian Astrophysical Observatory Star Catalog

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

catalogues and names

catalogues and names

GH Lup, HD 136739, SAO 242485, CP -52 8272

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

position, motion, parallax:

position (J2000)	RA: 15h 24min 38.327sec	DEC: -52° 51' 14.1''	±0.2 arcsec	source: 16
position (2000.72)	RA: 15h 24min 41sec	DEC: -52° 51' 23''	JD: 2451806.31
proper motion (J2000)	RA: -0.0008 arcsec/a	DEC: -0.004 arcsec/a		source: 16
galactic coord. (B1950)	longitude: 324.95°	latitude: 3.34°

magnitude:

visual	7.55 (observed)	source: 30
photovisual	8.4	source: 2

spectral information:

spectral class	G5		source: 96
Morgan-Keenan	G2Iab		source: 10
B-magnitude	9.01 ±0.039	B-V-magnitude	1.23
U-magnitude	9.99 ±0.038	U-B-magnitude	0.98

variability information:

source of data: 30

variability type	113
var. amplitude	0.28
var. period	9.28
var. epoch	2441125 22. June 1971, 12:00:00 UT
next max light	2451815.56 28. September 2000, 01:26:24 UT

sources:

2	HD and HDE Catalogs
Cannon, A.J., and E.C. Pickering, Harvard Annals, Vols 91-99, 1918-24, Cambridge, Massachusetts: Harvard University; Cannon, A.J., Harvard Annals, Vol. 100, 1925-36, Cambridge, Massachusetts: Harvard University; and Cannon, A.J., and M. Walton Mayall, Harvard Annals, Vol. 112, 1949, Cambridge, Massachusetts: Harvard University
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: 15h 20min 56.507sec	DEC: -52° 40' 38.87''	±0.018 arcsec
position (2000.72)	RA: 15h 24min 42sec	DEC: -52° 51' 23''	JD: 2451806.31
position (J2000)	RA: 15h 24min 38.277sec	DEC: -52° 51' 13.61''
proper motion B1950 (FK4)	RA: -0.0005 arcsec/a	DEC: 0.004 arcsec/a	±0.006 arcsec/a in RA ±0.006 arcsec/a in DEC
proper motion J2000 (FK5)	RA: -0.0009 arcsec/a	DEC: 0.006 arcsec/a
source of proper motion data	Determined by source catalog

magnitude:

visual	7.6 (accuracy: 2 decimals)
source of visual magnitude data	Determined by source catalog.
photographic	8.6 (accuracy: 2 decimals)
source of photographic magnitude data	Determined by source catalog.

spectral information:

spectral class	G5
source of spectral data	Taken from the Henry Draper Catalogue or no spectrum in source catalog.

catalogues

source catalogue	Cape Annals 19, catalogue number: 5857
Durchmusterung	CP-52 8272
Henry Draper Catalogue	136739

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

position:

position (equinox 1950.0)

RA: 15h 20min 56.5sec

DEC: -52° 40' 39''

variability informations:

variability type	CEP	pulsating variable star
magnitute at max. brightness	7.55
magnitute at min. brightness	7.83
photometric system	visual, photovisual or Johnson's V
epoch for maximum light [JD]	2441125.4 22. June 1971, 21:36:00 UT
period [d]	9.285
next maximum light [JD]	2451812.435 24. September 2000, 22:26:24 UT

spectral information

spectral class

G2Iab

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	50/191
constellation	Lupus
notes on existence	The star is equivalent to '0500192 GI'.

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.