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	q Aur, tet Aur, 37 Aur, HR 2095, HD 40312, SAO 58636, BD +37 1380, WDS 05597+3713A
constellation	Auriga

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

position, motion, parallax:

position (J2000)	RA: 5h 59min 43.3sec	DEC: +37° 12' 45''
position (2000.72)	RA: 5h 59min 46sec	DEC: +37° 12' 45''
position (B1900)	RA: 5h 52min 54.1sec	DEC: +37° 12' 21''
proper motion (J2000)	RA: 0.048 arcsec/a	DEC: -0.081 arcsec/a
radial velocity	30 km/s note: spectroscopic binaries
rotational velocity	49 km/s (uncertain) (variable)
trigonometric parallax	0.022 arcsec
galactic coordinates	longitude: 174.34°	latitude: 6.73°

note (category: dynamical parallaxes):

0.032".

magnitude

visual magnitude

2.62 (V on UBV Johnson system)

spectral / color information

spectral class	A0pSi
B-V-magnitude	-0.08
U-B-magnitude	-0.18
R-I-magnitude
IR-note	object is infrared source (NASA merged infrared catalogue, Schmitz et al., 1978)

variability information

variable star identification

The Aur

note (category: variability):

ADS 4566B. Alpha CV 2.62 - 2.70V. Amp. 0.43m at 1400A, 1.3735d. Magnetic field varies 3.618d.

double/multiple star system information

number of components of multiple star system	4
separation	3.5 arcsec
mag difference (of double or brightest multiple)	4.5
component ID	AB

note (category: double and multiple data):

AB binary , combined mag., colors. B is 7.2v G2V. C, 11v at 49" optical.

miscellaneous information

note (category: stellar radii or diameters):

Radius 3.3 solar.

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

position, motion, parallax:

position (J2000)	RA: 5h 59min 43.239sec	DEC: +37° 12' 45.57''	±0.43 arcsec	source: 16
position (2000.72)	RA: 5h 59min 46sec	DEC: +37° 12' 46''	JD: 2451809.24
proper motion (J2000)	RA: 0.0038 arcsec/a	DEC: -0.065 arcsec/a		source: 25
radial velocity	30 km/s			source: 25
trigonometric parallax	0.022 arcsec		±0.002 arcsec	source: 25
galactic coord. (B1950)	longitude: 174.34°	latitude: 6.73°

magnitude:

visual	2.6 (observed)	source: 31
photovisual	2.7	source: 2
photographic	2.7	source: 16

spectral information:

spectral class	A0		source: 96
Morgan-Keenan	A0pSi		source: 25
B-magnitude	2.54 ±0.05	B-V-magnitude	-0.08
U-magnitude	2.36 ±0.05	U-B-magnitude	-0.18

variability information:

source of data: 30

variability type	160
var. amplitude	0.08
var. period	1.37

double/multiple star system information:

source of data: 19

separation between brightest and second brightest component	3.5 arcsec
magnitude difference between brightest and second brightest component	4.5
position angle	314 °

component	magnitude	spectral class	catalogue(s)/name(s)
A	2.6	A0	q Aurigae, 37 Aur, HR 2095, HD 40312, SAO 58636
B	9.2	-

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
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
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
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 56min 18.627sec	DEC: +37° 12' 40.05''	±0.009 arcsec
position (2000.72)	RA: 5h 59min 46sec	DEC: +37° 12' 49''	JD: 2451809.24
position (J2000)	RA: 5h 59min 43.3sec	DEC: +37° 12' 44.66''
proper motion B1950 (FK4)	RA: 0.0041 arcsec/a	DEC: -0.082 arcsec/a	±0.002 arcsec/a in RA ±0.002 arcsec/a in DEC
proper motion J2000 (FK5)	RA: 0.004 arcsec/a	DEC: -0.081 arcsec/a
source of proper motion data	Determined by source catalog

magnitude:

visual	2.7 (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 HD with M stars reclassified by Miss Cannon.

catalogues

source catalogue	FK3, catalogue number: 228
Durchmusterung	BD+37 1380
Boss General Catalogue	7557
Henry Draper Catalogue	40312

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

position and proper motion:

position (J2000)	RA: 5h 59.7min	DEC: +37° 13'
proper motion (J2000)	RA: 0.044 arcsec/a	DEC: -0.078 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
AB	1871	95	6°	2.2''	2.7	7.2	A0pSi	STT 545
	1988		314°	3.5''
AC	1852	18	291°	43.2''	2.7	10.7	-	STT 545
	1963		298°	51.5''
AD	1840	8	351°	123.3''	2.7	9.2	-	STT 545
	1924		350°	130.7''

discoverer information:

discoverer code	discoverer	reference
STT 545	Struve, O.	-

notes:

note	Theta Aur. A is a variable of the Alpha CVn type.

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

position:

position (equinox 1950.0)

RA: 5h 56min 18.6sec

DEC: +37° 12' 40''

variability informations:

variability type	ACV	rotating variable star
magnitute at max. brightness	2.62
magnitute at min. brightness	2.7
photometric system	visual, photovisual or Johnson's V
period [d]	1.3735

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 'Bonner Durchmusterung'

miscanellous

ID in the GCVS catalogue	8/9008
constellation	Auriga
notes on existence	The star is equivalent to '0089016 pi'.
There are notes in published catalog.

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.