HR 7775

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

position, motion, parallax:

position (J2000)	RA: 20h 20min 46,6sec	DEC: -14° 47' 6''
position (2001,08)	RA: 20h 20min 51sec	DEC: -14° 46' 54''
position (B1900)	RA: 20h 15min 9,4sec	DEC: -15° 6' 1''
proper motion (J2000)	RA: 0,043 arcsec/a	DEC: 0 arcsec/a
radial velocity	-18 km/s note: spectroscopic binaries, single lined spectra note: orbital data avaible
rotational velocity	97 km/s (uncertain) (variable)
trigonometric parallax	0,01 arcsec
galactic coordinates	longitude: 29,12°	latitude: -26,32°

magnitude

visual magnitude

6,1
(V on UBV Johnson system)

spectral / color information

spectral class	A0III
B-V-magnitude	-0,02
U-B-magnitude	-0,11

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 (category: double and multiple data):

Complex system with HR 7776, CPM at 205". ADS 13717A is occultation double, 6.2 - 8.3v, sep. 0.8"; also 7.2, 7.2v, sep. 0.05". Component B, 10.2v, A1, binary with A at 0.9". A is astrometric binary. The close occultation pair is questioned; it has not been confirmed by speckle interferometry.

note (category: spectroscopic binaries):

ADS 13717A = component B of multiple star of which HR 7776 is component A. 8.6780d, K 37.9k/s, asini 4.22. These are components BC of triple spectroscopic system with HR 7776. BC sep. 0.0225", mag. diff 1.1. BC could be eclipsing. Component C of the spectroscopic triple system is not the same as any of the visual components of ADS 13717 listed by Worley; nor is it component C of the components Worley lists for HR 7776 = STF 52.

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

position, motion, parallax:

position (J2000)	RA: 20h 20min 46,538sec	DEC: -14° 47' 5,44''	ą0,19 arcsec	source: 16
position (2001,08)	RA: 20h 20min 51sec	DEC: -14° 46' 53''	JD: 2451938,13
proper motion (J2000)	RA: 0,0025 arcsec/a	DEC: 0,004 arcsec/a		source: 25
radial velocity	-18 km/s			source: 25
trigonometric parallax	0,01 arcsec		ą0,001 arcsec	source: 25
galactic coord. (B1950)	longitude: 29,13°	latitude: -26,32°

magnitude:

visual	6,1 (observed)	source: 25
photovisual	6,3	source: 16
photographic	6,1	source: 2

spectral information:

spectral class	B9		source: 96
Morgan-Keenan	A0III		source: 25
B-magnitude	6,08 ą0,05	B-V-magnitude	-0,02
U-magnitude	5,97 ą0,05	U-B-magnitude	-0,11

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	3,2
position angle	81 °

component	magnitude	spectral class	catalogue(s)/name(s)
A	6,1	B9	HR 7775, HD 193452, SAO 163471
B	8,788	F8

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
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 17min 58,071sec	DEC: -14° 56' 38,31''	ą0,017 arcsec
position (2001,08)	RA: 20h 20min 50sec	DEC: -14° 46' 53''	JD: 2451938,13
position (J2000)	RA: 20h 20min 46,562sec	DEC: -14° 47' 5,61''
proper motion B1950 (FK4)	RA: 0,0028 arcsec/a	DEC: 0,001 arcsec/a	ą0,002 arcsec/a in RA ą0,003 arcsec/a in DEC
proper motion J2000 (FK5)	RA: 0,003 arcsec/a	DEC: 0 arcsec/a
source of proper motion data	Determined by source catalog

magnitude:

visual	6,2 (accuracy: 2 decimals)
source of visual magnitude data	Taken from Harvard or San Luis photometry.

spectral information:

spectral class	B9
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: 28286
Durchmusterung	BD-15 5626
Boss General Catalogue	28286
Henry Draper Catalogue	193452

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.