x Scorpii

The object was found in the following catalogues:
  1. The Bright Star Catalogue, 5th Revised Ed. (Preliminary Version)

  2. SKY2000 - Master Star Catalog

  3. Smithsonian Astrophysical Observatory Star Catalog

  4. The Washington Visual Double Star Catalog, 1996.0

  5. 4th Catalog of Orbits of Visual Binaries

catalogues and names x Sco, HR 5977, HD 144069, SAO 159665, WDS 16044-1122AB
constellation Scorpius

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


position, motion, parallax:

position (J2000) RA: 16h 4min 22,1sec DEC: -11° 22' 23''
position (J1900) RA: 15h 58min 52sec DEC: -11° 5' 51''
proper motion (J2000) RA: -0,06 arcsec/a DEC: -0,029 arcsec/a
radial velocity -29 km/s
trigonometric parallax 0,048 arcsec
note (category: dynamical parallaxes): 0.038".

magnitude

visual magnitude 5,07
(original HR magnitude)

spectral / color information

spectral class F5IV

double/multiple star system information

number of components of multiple star system 5
separation 1,2 arcsec
mag difference (of double or brightest multiple) 0,2
component ID AB
note (category: double and multiple data): Binary with HR 5978, q.v.

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

position, motion, parallax:

position (J2000) RA: 16h 4min 22,191sec DEC: -11° 22' 22,6'' ±0,19 arcsec source: 16
proper motion (J2000) RA: -0,0043 arcsec/a DEC: -0,027 arcsec/a source: 16
radial velocity -29 km/s source: 25
trigonometric parallax 0,048 ±0,005 arcsec source: 25
galactic coord. (B1950) longitude: 0,03° latitude: 29,42°
GCI unit vector (J2000) X: -0,473906 Y: -0,858212 Z: -0,197194

magnitude:

visual 4,165 (observed) source: 20
photovisual 3,4 source: 16
photographic 5,3 source: 2

spectral information:

spectral class F8 source: 96
Morgan-Keenan F5IV+F5IV source: 25
B-magnitude 4,618 ±0,007 B-V-magnitude 0,453
U-magnitude 4,629 ±0,009 U-B-magnitude 0,011

double/multiple star system information:

source of data: 19
magnitude difference between brightest and second brightest component 0,3

component magnitude spectral class catalogue(s)/name(s)
A 7,3 F8 x Scorpii, HR 5978, HD 144070, SAO 159665
B 4,165 F8 x Scorpii, HR 5977, HD 144069, SAO 159665

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
20 Catalogue of Homogeneous Means in the UBV System
Mermilliod, J.C., Catalogue of Homogeneous Means in the UBV System, Institut d'Astronomie, Universite de Lausanne, 1994
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 (J1950) RA: 16h 1min 36,889sec DEC: -11° 14' 12,28'' ±0,028 arcsec
position (J2000) RA: 16h 4min 22,121sec DEC: -11° 22' 23,5''
proper motion J1950 (FK4) RA: -0,0043 arcsec/a DEC: -0,033 arcsec/a ±0,004 arcsec/a in RA
±0,004 arcsec/a in DEC
proper motion J2000 (FK5) RA: -0,0041 arcsec/a DEC: -0,029 arcsec/a
source of proper motion data Determined by source catalog

magnitude:

visual 4,2 (accuracy: 2 decimals)
source of visual magnitude data Taken from Harvard or San Luis photometry.

spectral information:

spectral class F8
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: 21593
Durchmusterung BD-10 4237A
Boss General Catalogue 21593
Henry Draper Catalogue 144069
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: 16h 4,4min DEC: -11° 22'
proper motion (J2000) RA: -0,047 arcsec/a DEC: -0,018 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 1825 often ° '' 4,8 5,1 F7V STF1998
AC 1823 often 79° 6,8'' 4,9 7,3 G1V STF1998
1990 48° 7,6''
AB-E 1921 1 169° 281,1'' 4,9 7,9 - ABT 12
BC 1933 27 61° 6,9'' 5,3 7,3 - STF1998
1975 56° 7,2''

discoverer information:

discoverer code discoverer reference
STF1998 Struve, F.G.W. -
ABT 12 Abetti, G. -

notes:

note Xi Sco. AB: P = 45.8yr., a = 0.76", motion direct. AB: Mt. Wilson spectral type F3s.

data from 4th Catalog of Orbits of Visual Binaries (Worley+, 1983)

position:

position (J1900) RA: 15h 58,9min DEC: -11° 6'

magnitudes, spectral classes, orbital elements:

author: P. Baize
date of observation: 1941
magnitude of component A: 4,9
magnitude of component B: 4,9
spectral class component B: F5IV
spectral class component B: F5IV
period [y]: 45,69
semi-major axis [arcsec]: 0,72
inclination [deg]: 36,9
node [deg]: 201,7 (ascending)
equinox of node: 1884
eccentricity: 0,74
time of periastron passage: 1951,14
grade: good
reference: Astronomie 56, 157; 1942.
notes Quintuple. Star C (mag. 7.30, 7", G1V) is in retrograde motion, and ADS 9910 (mags. 7.4-8.0, 11", dG6) is 281" distant and shares the proper motion.