26 Aquilae

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

position, motion, parallax:

position (J2000)	RA: 19h 20min 32.9sec	DEC: -5° 24' 57''
position (B1900)	RA: 19h 15min 12.6sec	DEC: -5° 36' 10''
proper motion (J2000)	RA: 0.116 arcsec/a	DEC: 0.048 arcsec/a
radial velocity	-19 km/s note: spectroscopic binaries, single lined spectra note: orbital data avaible
rotational velocity	<17 km/s (uncertain) (variable)
trigonometric parallax	0.03 arcsec
galactic coordinates	longitude: 31.39°	latitude: -8.93°

magnitude

visual magnitude

5.01
(V on UBV Johnson system)

spectral / color information

spectral class	G8III-IV
B-V-magnitude	0.92
U-B-magnitude	0.63
R-I-magnitude
IR-note	object is infrared source (NASA merged infrared catalogue, Schmitz et al., 1978)

double/multiple star system information

separation	115.9 arcsec
mag difference (of double or brightest multiple)	6.8
note	Worley (1978) update of the IDS

note (category: double and multiple data):

B probably optical.

note (category: spectroscopic binaries):

266.544d, K 29.9k/s, V0 -18.0k/s, asini 61.1. High orbital eccentricity, 0.83.

miscellaneous information

note (category: miscellaneous):

Possible X-ray source 3U1915-05.

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

position, motion, parallax:

magnitude:

spectral information:

double/multiple star system information:

source of data: 19

separation between brightest and second brightest component	0.5 arcsec
position angle	56 °

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: 19h 17min 52.72sec	DEC: -5° 30' 38.65''	±0.015 arcsec
position (J2000)	RA: 19h 20min 32.904sec	DEC: -5° 24' 56.69''
proper motion B1950 (FK4)	RA: 0.0075 arcsec/a	DEC: 0.048 arcsec/a	±0.003 arcsec/a in RA ±0.003 arcsec/a in DEC
proper motion J2000 (FK5)	RA: 0.0077 arcsec/a	DEC: 0.048 arcsec/a
source of proper motion data	Determined by source catalog

magnitude:

visual	5.1 (accuracy: 2 decimals)
source of visual magnitude data	Taken from Harvard or San Luis photometry.

spectral information:

spectral class	G5
source of spectral data	Taken from the Henry Draper Catalogue or no spectrum in source catalog.

catalogues

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

position and proper motion:

position (J2000)	RA: 19h 20.5min	DEC: -5° 25'
proper motion (J2000)	RA: 0.116 arcsec/a	DEC: 0.048 arcsec/a

double/multiple star system information:

discoverer information:

notes:

note	26 Aql. Aa is a spectroscopic binary, P = 266.5d.

catalogues and names	26 Aql, HR 7333, HD 181391, SAO 143286, BD -5 4936, FK5: 3544, WDS 19205-0525A
constellation	Aquila