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	n For, nu For, HR 612, HD 12767, SAO 167532, CD -29 706, FK5: 1055
constellation	Fornax

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

position, motion, parallax:

position (J2000)	RA: 2h 4min 29.4sec	DEC: -29° 17' 49''
position (2000.72)	RA: 2h 4min 31sec	DEC: -29° 17' 37''
position (B1900)	RA: 2h 0min 0.5sec	DEC: -29° 46' 36''
proper motion (J2000)	RA: 0.012 arcsec/a	DEC: 0.008 arcsec/a
radial velocity	19 km/s
rotational velocity	87 km/s (uncertain) (variable)
galactic coordinates	longitude: 224.89°	latitude: -73.78°

magnitude

visual magnitude

4.69 (V on UBV Johnson system)

spectral / color information

spectral class	B9.5pSi
B-V-magnitude	-0.17
U-B-magnitude	-0.51
R-I-magnitude

variability information

variable star identification

Nu For

note (category: variability):

Alpha CV?, 4.68 - 4.73V, 1.89d.

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

position, motion, parallax:

position (J2000)	RA: 2h 4min 29.44sec	DEC: -29° 17' 48.58''	±0.06 arcsec	source: 15
position (2000.72)	RA: 2h 4min 31sec	DEC: -29° 17' 37''	JD: 2451809.25
proper motion (J2000)	RA: 0.0009 arcsec/a	DEC: 0.008 arcsec/a		source: 25
radial velocity	19 km/s			source: 25
galactic coord. (B1950)	longitude: 224.87°	latitude: -73.78°

magnitude:

visual	4.69 (observed)	source: 25
photovisual	4.7	source: 2
photographic	4.7	source: 2

spectral information:

spectral class	A0		source: 96
Morgan-Keenan	B9.5pSi		source: 25
B-magnitude	4.52 ±0.05	B-V-magnitude	-0.17
U-magnitude	4.01 ±0.05	U-B-magnitude	-0.51

variability information:

source of data: 30

variability type	160
var. amplitude	0.05
var. period	1.89
var. epoch	2443475 27. November 1977, 12:00:00 UT
next max light	2451809.9 22. September 2000, 09:36:00 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: 2h 2min 14.967sec	DEC: -29° 32' 9.81''	±0.009 arcsec
position (2000.72)	RA: 2h 4min 31sec	DEC: -29° 17' 37''	JD: 2451809.25
position (J2000)	RA: 2h 4min 29.451sec	DEC: -29° 17' 48.8''
proper motion B1950 (FK4)	RA: 0.0008 arcsec/a	DEC: 0.01 arcsec/a	±0.002 arcsec/a in RA ±0.002 arcsec/a in DEC
proper motion J2000 (FK5)	RA: 0.001 arcsec/a	DEC: 0.006 arcsec/a
source of proper motion data	Determined by source catalog

magnitude:

visual	4.7 (accuracy: 2 decimals)
source of visual magnitude data	Taken from the "Henry Draper Catalogue".

spectral information:

spectral class	A0p
source of spectral data	Taken from the Henry Draper Catalogue or no spectrum in source catalog.

catalogues

source catalogue	FK4, catalogue number: 1055
Durchmusterung	CD-29 706
Boss General Catalogue	2506
Henry Draper Catalogue	12767

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

position:

position (equinox 1950.0)

RA: 2h 2min 15sec

DEC: -29° 32' 10''

variability informations:

variability type	ACV	rotating variable star
magnitute at max. brightness	4.68
magnitute at min. brightness	4.73
photometric system	visual, photovisual or Johnson's V
epoch for maximum light [JD]	2443475 27. November 1977, 12:00:00 UT
period [d]	1.89
next maximum light [JD]	2451809.9 22. September 2000, 09:36:00 UT

spectral information

spectral class

B9.5p(Si)

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	37/9013
constellation	Fornax
notes on existence	The star is equivalent to '0380001 R'.

variability type description

variability type

description

ACV

Alpha2 Canum Venaticorum variables. These are main-sequence stars with spectral types B8p-A7p and displaying strong magnetic fields. Spectra show abnormally strong lines of Si, Sr, Cr, and rare earths whose intensities vary with rotation. They exhibit magnetic field and brightness changes (periods of 0.5-160 days or more). The amplitudes of the brightness changes are usually withine 0.01-0.1 mag in V. ACVO Rapidly oscillating Alpha2 CVn variables. These are nonradially pulsating, rotating magnetic variables of Ap spectral type (DO Eri). Pulsation periods are in the range of 6-12 mmag (0.004-0.01 days), while amplitudes of light variation caused by the pulsation are about 0.01 mag in V. The pulsational variations are superposed on those caused by rotation.