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	Cujam, w Her, ome Her, 24 Her, HR 6117, HD 148112, SAO 102153, BD +14 3049, FK5: 613, WDS 16254+1402A
other names	Kajam, Cajam, Caiam
constellation	Hercules

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

note (category: star names):

Kajam; Cujam; Cajam; Caiam.

position, motion, parallax:

position (J2000)	RA: 16h 25min 25sec	DEC: +14° 2' 0''
position (2000.72)	RA: 16h 25min 27sec	DEC: +14° 1' 54''
position (B1900)	RA: 16h 20min 48sec	DEC: +14° 15' 48''
proper motion (J2000)	RA: 0.044 arcsec/a	DEC: -0.059 arcsec/a
radial velocity	-6 km/s note: variable radial velocity
rotational velocity	38 km/s (uncertain) (variable)
trigonometric parallax	0.041 arcsec
galactic coordinates	longitude: 29.46°	latitude: 38.63°

magnitude

visual magnitude

4.57 (V on UBV Johnson system)

spectral / color information

spectral class	B9pCr
B-V-magnitude	0
U-B-magnitude	-0.04
R-I-magnitude

note (category: spectra):

Also classified A2VpCrMnSr.

variability information

variable star identification

Ome Her

note (category: variability):

Alpha CV, amp. 0.08V, 2.951d, double wave light curve. Also rapid var. 0.15d.

double/multiple star system information

number of components of multiple star system	4
separation	28.4 arcsec
mag difference (of double or brightest multiple)	8.1
component ID	AC

note (category: double and multiple data):

B, 12.0v at 2" CPM; C optical.

miscellaneous information

note (category: group membership):

UMa stream; Sirius group.

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

position, motion, parallax:

position (J2000)	RA: 16h 25min 24.962sec	DEC: +14° 1' 59.75''	±0.06 arcsec	source: 15
position (2000.72)	RA: 16h 25min 27sec	DEC: +14° 1' 54''	JD: 2451809.25
proper motion (J2000)	RA: 0.003 arcsec/a	DEC: -0.059 arcsec/a		source: 25
radial velocity	-6 km/s			source: 25
trigonometric parallax	0.041 arcsec		±0.004 arcsec	source: 25
galactic coord. (B1950)	longitude: 29.46°	latitude: 38.63°

magnitude:

visual	4.576 (observed)	source: 31
photovisual	4.5	source: 2

spectral information:

spectral class	A0		source: 96
Morgan-Keenan	B9pCr		source: 25
B-magnitude	4.57 ±0.05	B-V-magnitude	0
U-magnitude	4.53 ±0.05	U-B-magnitude	-0.04

variability information:

source of data: 30

variability type	160
var. amplitude	0.08
var. period	2.95
var. epoch	2441255 30. October 1971, 12:00:00 UT
next max light	2451810.1 22. September 2000, 14:24:00 UT

double/multiple star system information:

source of data: 19

separation between brightest and second brightest component	0.8 arcsec
magnitude difference between brightest and second brightest component	7
position angle	233 °

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
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: 16h 23min 6.363sec	DEC: +14° 8' 49.24''	±0.005 arcsec
position (2000.72)	RA: 16h 25min 26sec	DEC: +14° 1' 57''	JD: 2451809.25
position (J2000)	RA: 16h 25min 24.967sec	DEC: +14° 1' 59.68''
proper motion B1950 (FK4)	RA: 0.003 arcsec/a	DEC: -0.063 arcsec/a	±0.001 arcsec/a in RA ±0.001 arcsec/a in DEC
proper motion J2000 (FK5)	RA: 0.0031 arcsec/a	DEC: -0.06 arcsec/a
source of proper motion data	Determined by source catalog

magnitude:

visual	4.5 (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: 613
Durchmusterung	BD+14 3049
Boss General Catalogue	22090
Henry Draper Catalogue	148112

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

position and proper motion:

position (J2000)	RA: 16h 25.4min	DEC: +14° 2'
proper motion (J2000)	RA: 0.044 arcsec/a	DEC: -0.059 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	1879	18	177°	1.9''	4.5	11.5	B9pCr	BU 625
	1967		233°	0.8''
AC	1879	11	104°	33.9''	4.5	11	-	BU 625
	1957		96°	28.4''
AD	1925	2	270°	126.2''	4.5	-	-	BU 625
	1960		271°	127.5''

discoverer information:

discoverer code	discoverer	reference
BU 625	Burnham, S.W.	-

notes:

note	Omega Her. A is variable. Proper motion of C -017 -010.

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

position:

position (equinox 1950.0)

RA: 16h 23min 6.4sec

DEC: +14° 8' 49''

variability informations:

variability type	ACV	rotating variable star
magnitute at max. brightness	4.57
magnitute amplitude	0.08
photometric system	visual, photovisual or Johnson's V
epoch for maximum light [JD]	2441254.7 30. October 1971, 04:48:00 UT
period [d]	2.951
next maximum light [JD]	2451810.427 22. September 2000, 22:14:53 UT

spectral information

spectral class

B9p(Cr-Mn-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	40/9024
constellation	Hercules
notes on existence	The star is equivalent to '0409107 g'.
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.