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 (suspected variables)

catalogues and names

catalogues and names	c Aql, NSV 12325, 47 Aql, HR 7497, HD 186203, SAO 105168, BD +11 3955, WDS 19426+1150A
constellation	Aquila

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

position, motion, parallax:

position (J2000)	RA: 19h 42min 34sec	DEC: +11° 49' 36''
position (B1900)	RA: 19h 37min 51.6sec	DEC: +11° 35' 28''
proper motion (J2000)	RA: -0.001 arcsec/a	DEC: -0.007 arcsec/a
radial velocity	-22 km/s note: spectroscopic binaries
rotational velocity	0 km/s (uncertain) (variable)
trigonometric parallax	0.006 arcsec
galactic coordinates	longitude: 49.34°	latitude: -5.7°

note (category: dynamical parallaxes):

0.0006".

magnitude

visual magnitude

5.27 (V on UBV Johnson system)

spectral / color information

spectral class	G0:III+A3V
B-V-magnitude	0.57
U-B-magnitude	-0.04

note (category: spectra):

Also classified G2+B8 and dF3+A3.

variability information

variable star identification

12325

double/multiple star system information

number of components of multiple star system	5
separation	0.4 arcsec
mag difference (of double or brightest multiple)	1.2
component ID	AB

note (category: double and multiple data):

AB, fixed sep.

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

position, motion, parallax:

position (J2000)	RA: 19h 42min 34.028sec	DEC: +11° 49' 35.87''	±0.35 arcsec	source: 17
proper motion (J2000)	RA: 0.0005 arcsec/a	DEC: -0.007 arcsec/a		source: 25
radial velocity	-22 km/s			source: 25
trigonometric parallax	0.006 arcsec		±0.001 arcsec	source: 25
galactic coord. (B1950)	longitude: 49.35°	latitude: -5.7°

magnitude:

visual	5.3 (observed)	source: 25
photovisual	5.3	source: 2
photographic	5.9	source: 16

spectral information:

spectral class	F5		source: 96
Morgan-Keenan	G0:III		source: 25
B-magnitude	5.87 ±0.05	B-V-magnitude	0.57
U-magnitude	5.89 ±0.5	U-B-magnitude	0.02

double/multiple star system information:

source of data: 19

separation between brightest and second brightest component	0.4 arcsec
magnitude difference between brightest and second brightest component	1.1
position angle	78 °

component	magnitude	spectral class	catalogue(s)/name(s)
A	5.3	F5	c Aquilae, 47 Aql, HR 7497, HD 186203, SAO 105168
B	5.291	+++

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
17	ACRS
Corbin, T.E., and S.E. Urban, Astrographic Catalog Reference Stars, United States Naval Observatory, 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: 19h 40min 12.766sec	DEC: +11° 42' 27.07''	±0.025 arcsec
position (J2000)	RA: 19h 42min 33.966sec	DEC: +11° 49' 35.78''
proper motion B1950 (FK4)	RA: -0.0002 arcsec/a	DEC: -0.005 arcsec/a	±0.003 arcsec/a in RA ±0.003 arcsec/a in DEC
proper motion J2000 (FK5)	RA: -0.0001 arcsec/a	DEC: -0.007 arcsec/a
source of proper motion data	Determined by source catalog

magnitude:

visual	5.3 (accuracy: 2 decimals)
source of visual magnitude data	Taken from Harvard or San Luis photometry.

spectral information:

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

catalogues

source catalogue	GC, catalogue number: 27272
Durchmusterung	BD+11 3955
Boss General Catalogue	27272
Henry Draper Catalogue	186203 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: 19h 42.6min	DEC: +11° 50'
proper motion (J2000)	RA: 0.007 arcsec/a	DEC: -0.007 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	1843	86	78°	0.6''	5.6	6.7	A3V+G0III	STT 380
	1993		-	0.4''
AC	1912	1	48°	81.6''	5.3	12.3	-	STT 380
AD	1924	1	317°	9.4''	5.3	11.5	-	HLM 26
AE	1941	1	275°	140''	5.3	10.3	-	J 1858

discoverer information:

discoverer code	discoverer	reference
STT 380	Struve, O.	-
HLM 26	-	-
J 1858	Jonckheere, R.	-

notes:

note	Chi Aql. A spectroscopic binary.

data from Combined General Catalogue of Variable Stars (suspected variables) (Kholopov+ 1998)

position:

position (equinox 1950.0)

RA: 19h 40min 12.8sec

DEC: +11° 42' 27''

variability informations:

variability type	-
magnitute at max. brightness	5.29
magnitute at min. brightness
photometric system	visual, photovisual or Johnson's V

spectral information

spectral class

*

references

to a study

2521D (designation: 577)

miscanellous

There are notes in the published catalog (Kukarkin et al.(1982)).