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	g1Ari, gam Ari, 5 Ari, HR 545, HD 11503, SAO 92680, BD +18 243 A, WDS 01535+1918B
constellation	Aries

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

note (category: star names):

The HD numbers and other data, especially spectral classes, for HR 545-6 have frequently been interchanged. HD 11502 is the brighter = HR 546, while HD 11503 = HR 545 is the slightly fainter N. prec. component B of ADS 1507.

position, motion, parallax:

position (J2000)	RA: 1h 53min 31.8sec	DEC: +19° 17' 45''
position (2000.72)	RA: 1h 53min 34sec	DEC: +19° 17' 58''
position (B1900)	RA: 1h 48min 2.4sec	DEC: +18° 48' 21''
proper motion (J2000)	RA: 0.078 arcsec/a	DEC: -0.112 arcsec/a
radial velocity	4 km/s note: variable radial velocity
rotational velocity	152 km/s (uncertain) (variable)
trigonometric parallax	0.026 arcsec
galactic coordinates	longitude: 142.55°	latitude: -41.2°

note (category: dynamical parallaxes):

0.019".

magnitude

visual magnitude

4.83 (original HR magnitude)

spectral / color information

spectral class

B9V

variability information

variable star identification

Var?

note (category: variability):

Sp. var. 38 min.

double/multiple star system information

number of components of multiple star system	3
separation	7.8 arcsec
mag difference (of double or brightest multiple)	0.1
component ID	AB

note (category: double and multiple data):

Binary with HR 546, q.v. Combined mag. HR 545/6, 3.88V; colors also combined.

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

position, motion, parallax:

position (J2000)	RA: 1h 53min 31.804sec	DEC: +19° 17' 45.06''	±1.24 arcsec	source: 29
position (2000.72)	RA: 1h 53min 34sec	DEC: +19° 17' 58''	JD: 2451809.25
proper motion (J2000)	RA: 0.0055 arcsec/a	DEC: -0.112 arcsec/a		source: 25
radial velocity	4 km/s			source: 25
trigonometric parallax	0.026 arcsec		±0.003 arcsec	source: 25
galactic coord. (B1950)	longitude: 142.55°	latitude: -41.2°

magnitude:

visual	4.83 (observed)	source: 51
photovisual	4.8	source: 2
photographic	4.8	source: 2

spectral information:

spectral class	A0		source: 96
Morgan-Keenan	B9V		source: 25
B-magnitude	4.795 ±0.05	B-V-magnitude	-0.035
U-magnitude	4.665 ±0.07	U-B-magnitude	-0.13

variability information:

source of data: 27

variability type	160
var. amplitude	0
var. period	2.61
var. epoch	2440998.99 16. February 1971, 11:45:36 UT
next max light	2451809.61 22. September 2000, 02:38:24 UT

double/multiple star system information:

source of data: 19

separation between brightest and second brightest component	7.5 arcsec
magnitude difference between brightest and second brightest component	0
position angle	0 °

component	magnitude	spectral class	catalogue(s)/name(s)
A	4.75	-	Mesarthim, g2Arietis, 5 Ari, HR 546, HD 11502, SAO 92681
B	4.83	A0	g1Arietis, 5 Ari, HR 545, HD 11503, SAO 92680

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
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
27	Catalog of Red Magnitudes (CRM)
Warren, W.H. Jr., Northern Hemisphere Catalog of Red Magnitudes, 1994
29	SAOJ2000
SAO on FK5 at J2000, 1989
51	Harvard photometry
"H" coded (Harvard photometry) magnitudes from the BSC5.
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: 1h 50min 46.855sec	DEC: +19° 3' 6.11''	±0.019 arcsec
position (2000.72)	RA: 1h 53min 34sec	DEC: +19° 18' 3''	JD: 2451809.25
position (J2000)	RA: 1h 53min 31.804sec	DEC: +19° 17' 45.06''
proper motion B1950 (FK4)	RA: 0.0055 arcsec/a	DEC: -0.108 arcsec/a	±0.002 arcsec/a in RA ±0.002 arcsec/a in DEC
proper motion J2000 (FK5)	RA: 0.0055 arcsec/a	DEC: -0.112 arcsec/a
source of proper motion data	Determined by source catalog

magnitude:

visual	4.8 (accuracy: 2 decimals)
source of visual magnitude data	Taken from Harvard or San Luis photometry.

spectral information:

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

remarks for duplicity and variability

Double star in Aitken's Double Star Catalogue (Aitken 1932)

catalogues

source catalogue	GC, catalogue number: 2290
Durchmusterung	BD+18 243B
Boss General Catalogue	2290
Henry Draper Catalogue	11502

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

position and proper motion:

position (J2000)	RA: 1h 53.5min	DEC: +19° 18'
proper motion (J2000)	RA: 0.081 arcsec/a	DEC: -0.108 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	1821	often	358°	8.6''	4.8	4.8	A1pSi B9V	STF 180
	1988		0°	7.5''
AC	1823	8	85°	228.8''	4.8	9.6	-	STF 180
	1924		84°	221.3''

discoverer information:

discoverer code	discoverer	reference
STF 180	Struve, F.G.W.	-

notes:

note	Gamma Ari. A is a variable of the Alpha CVn type. Proper motion of B +077 -115.

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

position:

position (equinox 1950.0)

RA: 1h 50min 46.9sec

DEC: +19° 2' 58''

variability informations:

variability type	ACV	rotating variable star
magnitute at max. brightness	4.62
magnitute amplitude	0.04
photometric system	visual, photovisual or Johnson's V
epoch for maximum light [JD]	2440998.99 16. February 1971, 11:45:36 UT
period [d]	2.6095
next maximum light [JD]	2451810.1485 22. September 2000, 15:33:50 UT
rising time	50 % of period

spectral information

spectral class

A1p(Cr-Si-Sr)

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	7/9003
constellation	Aries
notes on existence	The star is equivalent to '0080001 R'.
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.