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	l Eri, lam Eri, 69 Eri, HR 1679, HD 33328, SAO 131824, BD -8 1040, FK5: 190
constellation	Eridanus

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

position, motion, parallax:

position (J2000)	RA: 5h 9min 8.8sec	DEC: -8° 45' 15''
position (B1900)	RA: 5h 4min 21.6sec	DEC: -8° 52' 56''
proper motion (J2000)	RA: 0.002 arcsec/a	DEC: -0.004 arcsec/a
radial velocity	3 km/s note: variable radial velocity
rotational velocity	336 km/s (uncertain) (variable)
trigonometric parallax	-0.003 arcsec
galactic coordinates	longitude: 209.14°	latitude: -26.69°

note (category: radial and/or rotational velocities):

0.701538d. Amp. varies 30 to 60k/s on time scale of a year or less, correlated with hydrogen emission. Possibly pulsating.

magnitude

visual magnitude

4.27 (V on UBV Johnson system)

spectral / color information

spectral class	B2IVne
B-V-magnitude	-0.19
U-B-magnitude	-0.9
R-I-magnitude

note (category: spectra):

Shell star. H alpha emission with variable profile. Also classified B2III(e)p.

variability information

variable star identification

Lam Eri

note (category: variability):

Beta C 4.22 - 4.34V, 0.701538d. Both spectroscopic and new photometric data suggest period 0.70177d. Small changes in mean brightness (<0.1mag).

miscellaneous information

note (category: miscellaneous):

Candidate for becoming a Be star.

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

position, motion, parallax:

position (J2000)	RA: 5h 9min 8.783sec	DEC: -8° 45' 14.78''	±0.06 arcsec	source: 15
proper motion (J2000)	RA: 0.0002 arcsec/a	DEC: -0.004 arcsec/a		source: 25
radial velocity	3 km/s			source: 25
galactic coord. (B1950)	longitude: 209.14°	latitude: -26.69°

magnitude:

visual	4.2 (observed)	source: 31
photovisual	4.3	source: 2
photographic	4.2	source: 2

spectral information:

spectral class	B2		source: 96
Morgan-Keenan	B2IVne		source: 25
B-magnitude	4.08 ±0.05	B-V-magnitude	-0.19
U-magnitude	3.18 ±0.05	U-B-magnitude	-0.9

variability information:

source of data: 30

variability type	140
var. amplitude	0.12
var. period	0.7

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
31	CRM' (non-GCVS variable data)
Warren, W.H. Jr., Northern Hemisphere Catalog of Red Magnitudes, 1994
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: 5h 6min 45.092sec	DEC: -8° 49' 0.32''	±0.006 arcsec
position (J2000)	RA: 5h 9min 8.782sec	DEC: -8° 45' 14.75''
proper motion B1950 (FK4)	RA: -0.0003 arcsec/a	DEC: -0.004 arcsec/a	±0.001 arcsec/a in RA ±0.001 arcsec/a in DEC
proper motion J2000 (FK5)	RA: 0.0001 arcsec/a	DEC: -0.004 arcsec/a
source of proper motion data	Determined by source catalog

magnitude:

visual	4.3 (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: 190
Durchmusterung	BD-08 1040
Boss General Catalogue	6304
Henry Draper Catalogue	33328

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

position:

position (equinox 1950.0)

RA: 5h 6min 45.1sec

DEC: -8° 49' 0''

variability informations:

variability type	BCEP	pulsating variable star
magnitute at max. brightness	4.22
magnitute at min. brightness	4.34
photometric system	visual, photovisual or Johnson's V
period [d]	0.701538

spectral information

spectral class

B2IVe

references

to a study	Vol. II GCVS
to a chart/photograph	no chart is avaible, but the star is contained in the 'Bonner Durchmusterung'

miscanellous

ID in the GCVS catalogue	36/9011
constellation	Eridanus
notes on existence	The star is equivalent to '0369013 nu'.
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.