nu Scorpii

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

position, motion, parallax:

position (J2000)	RA: 16h 11min 58.6sec	DEC: -19° 26' 59''
position (2000.73)	RA: 16h 12min 2sec	DEC: -19° 27' 6''
position (B1900)	RA: 16h 6min 9.8sec	DEC: -19° 11' 25''
proper motion (J2000)	RA: -0.01 arcsec/a	DEC: -0.009 arcsec/a
radial velocity	-14 km/s
rotational velocity	67 km/s (uncertain) (variable)
trigonometric parallax	0.03 arcsec
galactic coordinates	longitude: 354.61°	latitude: 22.71°

note (category: radial and/or rotational velocities):

ADS 9951D, -3k/s; vsini 73k/s.

note (category: dynamical parallaxes):

0.009".

magnitude

visual magnitude

6.3
(V on UBV Johnson system)

spectral / color information

spectral class	B8V+B9VpSi
B-V-magnitude	0.13
U-B-magnitude	-0.37

note (category: spectra):

Also classified B9III+B9.5V.

double/multiple star system information

number of components of multiple star system	5
separation	41.1 arcsec
mag difference (of double or brightest multiple)	2.5
component ID	AC

note (category: double and multiple data):

ADS 9951 at least quintuple system with HR 6027 of which components CD = HR 6026 binary, 6.9 B8V or B9III, 7.9v B9Vp, sep. 2". C is -19d4332.

miscellaneous information

note (category: group membership):

Sco OB2; Sco-Cen cluster; upper Sco member; reflection nebula and dust surrounding star. Assoc. Sco R1; IC 4592 at 145 pc.

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

position, motion, parallax:

position (J2000)	RA: 16h 11min 58.603sec	DEC: -19° 27' 0.15''	ą0.19 arcsec	source: 16
position (2000.73)	RA: 16h 12min 2sec	DEC: -19° 27' 7''	JD: 2451810.12
proper motion (J2000)	RA: -0.0003 arcsec/a	DEC: -0.018 arcsec/a		source: 25
radial velocity	-14 km/s			source: 25
trigonometric parallax	0.03 arcsec		ą0.003 arcsec	source: 25
galactic coord. (B1950)	longitude: 354.62°	latitude: 22.71°

magnitude:

visual	6.3 (observed)	source: 25
photovisual	6.2	source: 16
photographic	6.5	source: 2

spectral information:

spectral class	A7		source: 96
Morgan-Keenan	B8V+B9VpSi		source: 25
B-magnitude	6.43 ą0.05	B-V-magnitude	0.13
U-magnitude	6.06 ą0.05	U-B-magnitude	-0.37

double/multiple star system information:

source of data: 19

separation between brightest and second brightest component	41.2 arcsec
magnitude difference between brightest and second brightest component	1.9
position angle	337 °

component	magnitude	spectral class	catalogue(s)/name(s)
A	4.01	B3	Jabbah, n Scorpii, 14 Sco, HR 6027, HD 145502, SAO 159764
B	6.3	A7	n Scorpii, 14 Sco, HR 6026, HD 145501, SAO 159763

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: 16h 9min 3.949sec	DEC: -19° 19' 17.45''	ą0.03 arcsec
position (2000.73)	RA: 16h 12min 1sec	DEC: -19° 27' 4''	JD: 2451810.12
position (J2000)	RA: 16h 11min 58.573sec	DEC: -19° 26' 58.71''
proper motion B1950 (FK4)	RA: -0.0008 arcsec/a	DEC: -0.012 arcsec/a	ą0.005 arcsec/a in RA ą0.004 arcsec/a in DEC
proper motion J2000 (FK5)	RA: -0.0007 arcsec/a	DEC: -0.009 arcsec/a
source of proper motion data	Determined by source catalog

magnitude:

visual	6.5 (accuracy: 2 decimals)
source of visual magnitude data	Taken from Harvard or San Luis photometry.

spectral information:

spectral class	A
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: 21771
Durchmusterung	BD-19 4332
Boss General Catalogue	21771
Henry Draper Catalogue	145501

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

position and proper motion:

position (J2000)	RA: 16h 12min	DEC: -19° 28'
proper motion (J2000)	RA: -0.01 arcsec/a	DEC: -0.026 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
Aa	1988	2	172°	0.1''	4.01	-	B3V	CHR 146
	1989		165°	-
Aa-B	1876	66	°	0.7''	4.4	6.9	-	BU 120
	1991		-	1.3''
Aa-C	1821	40	337°	41.2''	4.4	6.26	-	H 6
CD	1846	66	39°	1.1''	6.8	7.5	B8/9V	MTL 2
	1974		53°	2.3''

discoverer information:

discoverer code	discoverer	reference
CHR 146	-	-
BU 120	Burnham, S.W.	-
H 6	Herschel, W.	-
MTL 2	Mitchel, O.M.	-

notes:

note	Nu Sco. A is a spectroscopic and occultation binary. H V 6. Shows two spectra, B8V+B9VpSi, so the system is at least quintuple.

catalogues and names	n Sco, 14 Sco, HR 6026, HD 145501, SAO 159763, BD -19 4332, WDS 16120-1928C
constellation	Scorpius