catalogues and names

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

SKY2000 - Master Star Catalog

Smithsonian Astrophysical Observatory Star Catalog

The Washington Visual Double Star Catalog, 1996.0

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

catalogues and names

catalogues and names	n Eri, nu Eri, 48 Eri, HR 1463, HD 29248, SAO 131346, BD -3 834, FK5: 169, WDS 04363-0321
constellation	Eridanus

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

position, motion, parallax:

position (J2000)	RA: 4h 36min 19.1sec	DEC: -3° 21' 9''
position (B1900)	RA: 4h 31min 19.3sec	DEC: -3° 33' 25''
proper motion (J2000)	RA: 0.002 arcsec/a	DEC: -0.005 arcsec/a
radial velocity	15 km/s note: spectroscopic binaries
rotational velocity	25 km/s (uncertain) (variable)
galactic coordinates	longitude: 199.31°	latitude: -31.38°

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

0.19d.

magnitude

visual magnitude

3.93 (V on UBV Johnson system)

spectral / color information

spectral class	B2III
B-V-magnitude	-0.21
U-B-magnitude	-0.89
R-I-magnitude

variability information

variable star identification

Nu Eri

note (category: variability):

Beta C 3.4 - 3.60p, 0.17790414d, changing. Probable interference periods 0.1779 and 0.1735d with beat period of 7.0256d. Possibly also E, 103.9d.

double/multiple star system information

separation	50.9 arcsec
mag difference (of double or brightest multiple)	9.2
note	Worley (1978) update of the IDS

miscellaneous information

note (category: group membership):

Ori OB1.

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

position, motion, parallax:

position (J2000)	RA: 4h 36min 19.138sec	DEC: -3° 21' 8.89''	±0.06 arcsec	source: 15
proper motion (J2000)	RA: 0.0001 arcsec/a	DEC: -0.005 arcsec/a		source: 25
radial velocity	15 km/s			source: 25
galactic coord. (B1950)	longitude: 199.31°	latitude: -31.38°

magnitude:

visual	3.93 (observed)	source: 25
photovisual	4.1	source: 2
photographic	3.9	source: 2

spectral information:

spectral class	B2		source: 96
Morgan-Keenan	B2III		source: 25
B-magnitude	3.72 ±0.05	B-V-magnitude	-0.21
U-magnitude	2.83 ±0.05	U-B-magnitude	-0.89

variability information:

source of data: 30

variability type	140
var. amplitude	0.14
var. period	0.18
var. epoch	2433629 13. December 1950, 12:00:00 UT
next max light	2452219.22 5. November 2001, 17:16:48 UT

double/multiple star system information:

source of data: 19

separation between brightest and second brightest component	50.9 arcsec
magnitude difference between brightest and second brightest component	9.4
position angle	170 °

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
19	WDS Catalog
Worley, C.E., and G.G. Douglass, Washington Catalog of Visual Double Stars 1996.0, United States Naval Observatory, 1996
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: 4h 33min 49.094sec	DEC: -3° 27' 11.62''	±0.005 arcsec
position (J2000)	RA: 4h 36min 19.147sec	DEC: -3° 21' 8.84''
proper motion B1950 (FK4)	RA: -0.0001 arcsec/a	DEC: -0.003 arcsec/a	±0.001 arcsec/a in RA ±0.001 arcsec/a in DEC
proper motion J2000 (FK5)	RA: 0.0002 arcsec/a	DEC: -0.004 arcsec/a
source of proper motion data	Determined by source catalog

magnitude:

visual	4.1 (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: 169
Durchmusterung	BD-03 834
Boss General Catalogue	5617
Henry Draper Catalogue	29248

data from The Washington Visual Double Star Catalog, 1996.0 (Worley+, 1996)

position and proper motion:

position (J2000)	RA: 4h 36.3min	DEC: -3° 21'
proper motion (J2000)	RA: 0.002 arcsec/a	DEC: -0.005 arcsec/a

double/multiple star system information:

component	year	number of measures	position angle	angular separation	magnitude of 1st component	magnitude of 2nd component	spectral class(es)	discoverer code
-	1909	1	170°	50.9''	3.93	13.3	B2III	BUP 64

discoverer information:

discoverer code	discoverer	reference
BUP 64	-	-

notes:

note	Nu Eri. A is a Beta CMa-type variable.

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

position:

position (equinox 1950.0)

RA: 4h 33min 49.1sec

DEC: -3° 27' 12''

variability informations:

variability type	BCEP	pulsating variable star
magnitute at max. brightness	3.92
magnitute amplitude	0.14
photometric system	photographic magnitudes
epoch for maximum light [JD]	2433629.277 13. December 1950, 18:38:53 UT
period [d]	0.17790414
next maximum light [JD]	2452219.19220516 5. November 2001, 16:36:47 UT

spectral information

spectral class

B2III

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 'Bonner Durchmusterung'

miscanellous

ID in the GCVS catalogue	36/9013
constellation	Eridanus
notes on existence	The star is equivalent to '03690151omi 1'.
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.