catalogues and names

The Bright Star Catalogue, 5th Revised Ed. (Preliminary Version)

SKY2000 - Master Star Catalog

Smithsonian Astrophysical Observatory Star Catalog

catalogues and names

catalogues and names	70 Aql, HR 7873, HD 196321, SAO 144624, BD -3 4961, FK5: 3648
constellation	Aquila

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

position, motion, parallax:

position (J2000)	RA: 20h 36min 43.6sec	DEC: -2° 33' 0''
position (B1900)	RA: 20h 31min 31.2sec	DEC: -2° 53' 47''
proper motion (J2000)	RA: 0.013 arcsec/a	DEC: -0.011 arcsec/a
radial velocity	-10 km/s
trigonometric parallax	0.016 arcsec
galactic coordinates	longitude: 43.21°	latitude: -24.49°

magnitude

visual magnitude

4.89 (V on UBV Johnson system)

spectral / color information

spectral class	K5II
B-V-magnitude	1.6
U-B-magnitude	1.95
IR-note	object is infrared source (NASA merged infrared catalogue, Schmitz et al., 1978)

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

position, motion, parallax:

position (J2000)	RA: 20h 36min 43.641sec	DEC: -2° 32' 59.65''	±0.22 arcsec	source: 15
proper motion (J2000)	RA: 0.0009 arcsec/a	DEC: -0.011 arcsec/a		source: 25
radial velocity	-10 km/s			source: 25
trigonometric parallax	0.016 arcsec		±0.002 arcsec	source: 25
galactic coord. (B1950)	longitude: 43.22°	latitude: -24.49°

magnitude:

visual	4.89 (observed)	source: 25
photovisual	5.2	source: 2
photographic	6.4	source: 2

spectral information:

spectral class	K5		source: 96
Morgan-Keenan	K4+IIIBa1		source: 25
B-magnitude	6.49 ±0.05	B-V-magnitude	1.6
U-magnitude	8.44 ±0.05	U-B-magnitude	1.95

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
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 34min 7.407sec	DEC: -2° 43' 27.16''	±0.014 arcsec
position (J2000)	RA: 20h 36min 43.61sec	DEC: -2° 32' 58.55''
proper motion B1950 (FK4)	RA: 0.0003 arcsec/a	DEC: -0.001 arcsec/a	±0.003 arcsec/a in RA ±0.002 arcsec/a in DEC
proper motion J2000 (FK5)	RA: 0.0005 arcsec/a	DEC: -0.004 arcsec/a
source of proper motion data	Determined by source catalog

magnitude:

visual	5.2 (accuracy: 2 decimals)
source of visual magnitude data	Taken from Harvard or San Luis photometry.

spectral information:

spectral class	K5
source of spectral data	Taken from the Henry Draper Catalogue or no spectrum in source catalog.

catalogues

source catalogue	GC, catalogue number: 28684
Durchmusterung	BD-03 4961
Boss General Catalogue	28684
Henry Draper Catalogue	196321