Dabih

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

note (category: star names):

Dabih. Beta1 = Dabih Major; Beta2 = Dabih Minor.

position, motion, parallax:

position (J2000)	RA: 20h 21min 0,7sec	DEC: -14° 46' 53''
position (2001,08)	RA: 20h 21min 5sec	DEC: -14° 46' 41''
position (B1900)	RA: 20h 15min 23,6sec	DEC: -15° 5' 50''
proper motion (J2000)	RA: 0,042 arcsec/a	DEC: 0,002 arcsec/a
radial velocity	-19 km/s note: spectroscopic binaries note: orbital data avaible
rotational velocity	54 km/s (uncertain) (variable)
trigonometric parallax	0,01 arcsec
galactic coordinates	longitude: 29,15°	latitude: -26,37°

magnitude

visual magnitude

3,08
(V on UBV Johnson system)

spectral / color information

spectral class	F8V+A0
B-V-magnitude	0,79
U-B-magnitude	0,28
R-I-magnitude
IR-note	object is infrared source (NASA merged infrared catalogue, Schmitz et al., 1978)

note (category: spectra):

Also classified G0III + B8V, K0II-IIIp + A0, B8V + K0II-III, or G8II + A0V:.

double/multiple star system information

number of components of multiple star system	8
separation	0 arcsec
mag difference (of double or brightest multiple)	0,3
component ID	*
note	Worley (1978) update of the IDS

note (category: double and multiple data):

Complex system with HR 7775, q.v. Component B, vsini 97k/s. Occultations indicate component A is multiple system: 4.0, 4.3v sep. 0.0002", 4.8v at 0.022" and 6.7v at 0.0001". A also suspected astrometric binary, 3.07 F8V. Possibly also two faint 13v components at 112" discovered by John Herschel.

note (category: spectroscopic binaries):

HR 7776-7775 = AxBC. 1374.126d, K 21.9k/s, V0 -18.9k/s, msin3i 3.75, asini 376. Alternate orbit 1374.23d, K 22.44k/s, V0 -18.95k/s, msin3i 3.63, asini 382.5. Might be eclipsing. vsini of sceondary 115k/s?

miscellaneous information

note (category: stellar radii or diameters):

Occultation diam. = 0.00305 - 0.00317". Diam. primary 0.0033".

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

position, motion, parallax:

position (J2000)	RA: 20h 21min 0,673sec	DEC: -14° 46' 52,99''	ą0,06 arcsec	source: 15
position (2001,08)	RA: 20h 21min 5sec	DEC: -14° 46' 41''	JD: 2451938,13
proper motion (J2000)	RA: 0,0029 arcsec/a	DEC: 0,002 arcsec/a		source: 25
radial velocity	-19 km/s			source: 25
trigonometric parallax	0,01 arcsec		ą0,001 arcsec	source: 25
galactic coord. (B1950)	longitude: 29,16°	latitude: -26,37°

magnitude:

visual	3,08 (observed)	source: 25
photovisual	3,3	source: 2
photographic	3,8	source: 2

spectral information:

spectral class	G0		source: 96
Morgan-Keenan	K0II-III		source: 25
B-magnitude	3,87 ą0,05	B-V-magnitude	0,79
U-magnitude	4,15 ą0,05	U-B-magnitude	0,28

double/multiple star system information:

source of data: 19

separation between brightest and second brightest component	0 arcsec
position angle	30 °

component	magnitude	spectral class	catalogue(s)/name(s)
A	3,08	G0	Dabih, b Capricorni, 9 Cap, HR 7776, HD 193495, SAO 163481
B	3,46	+++

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
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: 20h 18min 12,2sec	DEC: -14° 56' 26,57''	ą0,004 arcsec
position (2001,08)	RA: 20h 21min 4sec	DEC: -14° 46' 41''	JD: 2451938,13
position (J2000)	RA: 20h 21min 0,672sec	DEC: -14° 46' 52,93''
proper motion B1950 (FK4)	RA: 0,0027 arcsec/a	DEC: 0,003 arcsec/a	ą0,001 arcsec/a in RA ą0,001 arcsec/a in DEC
proper motion J2000 (FK5)	RA: 0,0029 arcsec/a	DEC: 0,002 arcsec/a
source of proper motion data	Determined by source catalog

magnitude:

visual	3,3 (accuracy: 2 decimals)
source of visual magnitude data	Taken from the "Henry Draper Catalogue".

spectral information:

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

catalogues

source catalogue	FK4, catalogue number: 762
Durchmusterung	BD-15 5629
Boss General Catalogue	28295
Henry Draper Catalogue	193495 The "SAO Catalog" entry refers to two consecutive HD numbers, the lower of which is given.

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

position and proper motion:

position (J2000)	RA: 20h 21min	DEC: -14° 47'
proper motion (J2000)	RA: 0 arcsec/a	DEC: 0 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
-	1891	4	322°	6,4''	13	13,4	-	HJ 2948
Aa	1976	3	49°	0''	3,1	-	F8V+A0	BLA
Aa	1991	3	30°	-	3,1	-	F8V+A0	BLA
Aa-B	1835	11	267°	205,3''	3,1	6,2	-	STF 52
Aa-C	1912	1	134°	226,6''	3,4	9	-	STF 52
BC	1913	1	111°	397,6''	6,2	9	-	STF 52
B-DE	1891	1	294°	111,7''	-	-	-	HJ 2948

discoverer information:

discoverer code	discoverer	reference
HJ 2948	Herschel, J.	-
BLA	Blazit, A. et al
STF 52	Struve, F.G.W.	-

notes:

note	Aa: Beta Cap. A is an occultation and interferometric binary, and is physical with the multiple system BAR 12 at 205". Aa-B: Beta 2 and Beta 1 Cap. A measure of Beta (2) Cap and HJ 2948A.

catalogues and names	Dabih, b Cap, NSV 25105, 9 Cap, HR 7776, HD 193495, SAO 163481, BD -15 5629, FK5: 762, WDS 20210-1447A
constellation	Capricornus