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	d Lup, del Lup, HR 5695, HD 136298, SAO 225691, CD -40 9538, FK5: 1402
constellation	Lupus

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

position, motion, parallax:

position (J2000)	RA: 15h 21min 22.3sec	DEC: -40° 38' 51''
position (2000.72)	RA: 15h 21min 25sec	DEC: -40° 39' 0''
position (B1900)	RA: 15h 14min 48.3sec	DEC: -40° 17' 7''
proper motion (J2000)	RA: -0.015 arcsec/a	DEC: -0.026 arcsec/a
radial velocity	0 km/s note: suspected variable radial velocity
rotational velocity	221 km/s (uncertain) (variable)
galactic coordinates	longitude: 331.32°	latitude: 13.82°

magnitude

visual magnitude

3.22 (V on UBV Johnson system)

spectral / color information

spectral class	B1.5IV
B-V-magnitude	-0.22
U-B-magnitude	-0.89
R-I-magnitude

variability information

variable star identification

Del Lup

note (category: variability):

Beta C 3.21 - 3.24V, 0.16547d; 0.14273d also possible.

miscellaneous information

note (category: group membership):

Member of the local association (Pleiades group); certain member of the Sco-Cen cluster; upper Cen group of Sco-Cen assoc.; member of Pleiades group.

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

position, motion, parallax:

position (J2000)	RA: 15h 21min 22.33sec	DEC: -40° 38' 51.39''	±0.06 arcsec	source: 15
position (2000.72)	RA: 15h 21min 25sec	DEC: -40° 39' 0''	JD: 2451809.20
proper motion (J2000)	RA: -0.0013 arcsec/a	DEC: -0.026 arcsec/a		source: 25
radial velocity	0 km/s			source: 25
galactic coord. (B1950)	longitude: 331.33°	latitude: 13.82°

magnitude:

visual	3.22 (observed)	source: 25
photovisual	3.4	source: 2
photographic	3.2	source: 2

spectral information:

spectral class	B2		source: 96
Morgan-Keenan	B1.5IV		source: 25
B-magnitude	3 ±0.05	B-V-magnitude	-0.22
U-magnitude	2.11 ±0.05	U-B-magnitude	-0.89

variability information:

source of data: 30

variability type	140
var. amplitude	0.04
var. period	0.17
var. epoch	2441045 3. April 1971, 12:00:00 UT
next max light	2451809.23 21. September 2000, 17:31:12 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
15	FK5, FK5 Extension and FK5 Supplement
Fricke, W., H. Schwan and T. Lederle, "Fifth Fundamental Catalogue (FK5), Part I. The Basic Fundamental Stars," Veroff. Astronomisches Recheninstitut, No. 32, Heidelberg, Germany, 1988, and Fricke, W., H. Schwan, and T.E. Corbin, "Fifth Fundamental Catalogue (FK5), Part II. The FK5 Extension," Veröff. Astronomisches Recheninstitut, No. 33, Heidelberg, Germany, 1991
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: 15h 18min 4.851sec	DEC: -40° 28' 4.92''	±0.012 arcsec
position (2000.72)	RA: 15h 21min 25sec	DEC: -40° 38' 59''	JD: 2451809.20
position (J2000)	RA: 15h 21min 22.33sec	DEC: -40° 38' 51.65''
proper motion B1950 (FK4)	RA: -0.0014 arcsec/a	DEC: -0.032 arcsec/a	±0.003 arcsec/a in RA ±0.003 arcsec/a in DEC
proper motion J2000 (FK5)	RA: -0.0013 arcsec/a	DEC: -0.029 arcsec/a
source of proper motion data	Determined by source catalog

magnitude:

visual	3.4 (accuracy: 2 decimals)
source of visual magnitude data	Taken from the "Henry Draper Catalogue".

spectral information:

spectral class	B2
source of spectral data	Taken from the Henry Draper Catalogue or no spectrum in source catalog.

catalogues

source catalogue	FK4, catalogue number: 1402
Durchmusterung	CD-40 9538
Boss General Catalogue	20620
Henry Draper Catalogue	136298

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

position:

position (equinox 1950.0)

RA: 15h 18min 4.9sec

DEC: -40° 28' 5''

variability informations:

variability type	BCEP	pulsating variable star
magnitute at max. brightness	3.2
magnitute at min. brightness	3.24
photometric system	visual, photovisual or Johnson's V
epoch for maximum light [JD]	2441045.172 3. April 1971, 16:07:41 UT
period [d]	0.16547
next maximum light [JD]	2451809.32644 21. September 2000, 19:50:04 UT
rising time	50 % of period

spectral information

spectral class

B1.5IV

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 'Cordoba Durchmusterung'

miscanellous

ID in the GCVS catalogue	50/9004
constellation	Lupus
notes on existence	The star is equivalent to '0509018 sig'.
There are notes in published catalog.

variability type description

variability type

description

BCEP

Variables of the Beta Cephei type (Beta Cep, Beta CMa), which are pulsating O8-B6 I-V stars with periods of light and radial-velocity variations in the range of 0.1 - 0.6 days and light amplitudes from 0.01 to 0.3 mag in V. The light curves are similar in shape to average radial-velocity curves but lag in phase by a quarter of the period, so that maximum brightness corresponds to maximum contraction, i.e., to minimum stellar radius. The majority of these stars probably show radial pulsations, but some (V649 Per) display nonradial pulsations; multiperiodicity is characteristic of many of these stars.