Nodus Secundus

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

note (category: star names):

Nodus Secundus; Altais; Aldib, a name corresponding to a group rather than to a single star.

position, motion, parallax:

position (J2000)	RA: 19h 12min 33.3sec	DEC: +67° 39' 42''
position (B1900)	RA: 19h 12min 31.9sec	DEC: +67° 29' 8''
proper motion (J2000)	RA: 0.094 arcsec/a	DEC: 0.093 arcsec/a
radial velocity	25 km/s note: variable radial velocity
rotational velocity	<17 km/s (uncertain) (variable)
trigonometric parallax	0.032 arcsec
galactic coordinates	longitude: 98.65°	latitude: 23°

magnitude

visual magnitude

3.07
(V on UBV Johnson system)

spectral / color information

spectral class	G9III
B-V-magnitude	1
U-B-magnitude	0.78
R-I-magnitude
IR-note	object is infrared source (NASA merged infrared catalogue, Schmitz et al., 1978)

double/multiple star system information

separation	88.1 arcsec
mag difference (of double or brightest multiple)	9.2
note	Worley (1978) update of the IDS

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

position, motion, parallax:

magnitude:

visual	3.07 (observed)	source: 25
photovisual	3.2	source: 2

spectral information:

double/multiple star system information:

source of data: 19

separation between brightest and second brightest component	88.1 arcsec
magnitude difference between brightest and second brightest component	9.3
position angle	352 °

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 12min 32.824sec	DEC: +67° 34' 25.03''	±0.004 arcsec
position (J2000)	RA: 19h 12min 33.286sec	DEC: +67° 39' 41.57''
proper motion B1950 (FK4)	RA: 0.0158 arcsec/a	DEC: 0.093 arcsec/a	±0.001 arcsec/a in RA ±0.001 arcsec/a in DEC
proper motion J2000 (FK5)	RA: 0.0165 arcsec/a	DEC: 0.092 arcsec/a
source of proper motion data	Determined by source catalog

magnitude:

visual	3.2 (accuracy: 2 decimals)
source of visual magnitude data	Taken from the "Henry Draper Catalogue".

spectral information:

spectral class	K0
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 12.6min	DEC: +67° 40'
proper motion (J2000)	RA: 0.094 arcsec/a	DEC: 0.093 arcsec/a

double/multiple star system information:

discoverer information:

discoverer code	discoverer	reference
BUP 186	-	-

notes:

note	Delta Dra.

catalogues and names	Nodus Secundus, d Dra, 57 Dra, HR 7310, HD 180711, SAO 18222, BD +67 1129, FK5: 723, WDS 19126+6740
other names	Altais, Aldib
constellation	Draco