Antares


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

  6. Combined General Catalogue of Variable Stars (Vol. I-III)


catalogues and names Antares, a Sco, alf Sco, 21 Sco, HR 6134, HD 148478, SAO 184415, FK5: 616, WDS 16294-2626
other names Cor Scorpii, Kalb al Akrab, Vespertilio
constellation Scorpius

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

note (category: star names): ANTARES; Cor Scorpii; Kalb al Akrab; Vespertilio.

object is infrared source (NASA merged infrared catalogue, Schmitz et al., 1978)

position, motion, parallax:

position (J2000) RA: 16h 29min 24,4sec DEC: -26 25' 55''
position (J1900) RA: 16h 23min 16,4sec DEC: -26 12' 36''
proper motion (J2000) RA: -0,01 arcsec/a DEC: -0,02 arcsec/a
radial velocity -3 km/s
note: spectroscopic binaries
rotational velocity =<20 km/s (uncertain) (variable)
trigonometric parallax 0,024 arcsec
note (category: radial and/or rotational velocities): 7.5 yrs.
note (category: dynamical parallaxes): 0.011".

magnitude

visual magnitude 0,96
(V on UBV Johnson system)

spectral / color information

spectral class M1.5Iab-Ib+B4Ve
B-V-magnitude 1,83
U-B-magnitude 1,34
R-I-magnitude 1,23
note (category: spectra): Ultraviolet FeII emission. 5-micrometer observations indicate carbon monoxide.

variability information

variable star identification Alp Sco
note (category: variability): ADS 10074A, SRc 0.88 - 1.8V, 1733d. Possibly considerably fainter before 150 A.D.: see HR 5685.

double/multiple star system information

separation 2,9 arcsec
mag difference (of double or brightest multiple) 4,2
note (category: double and multiple data): Var. M1Ib, 5.5 B2.5V, 878y, a = 2.90", masses 15.5 and 7.0 solar. Companion is radio source. SKYLAB confirms cool star, hot companion.

miscellaneous information

note (category: group membership): Sco OB2; Sco-Cen stream; in reflection nebula; assoc. Sco R1; dust shell beyond 12 R.
note (category: stellar radii or diameters): Occultation diam. = 0.041".

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

position, motion, parallax:

position (J2000) RA: 16h 29min 24,465sec DEC: -26 25' 55,19'' 0,06 arcsec source: 15
proper motion (J2000) RA: -0,0007 arcsec/a DEC: -0,02 arcsec/a source: 25
radial velocity -3 km/s source: 25
trigonometric parallax 0,024 0,002 arcsec source: 25
galactic coord. (B1950) longitude: 351,95 latitude: 15,06
GCI unit vector (J2000) X: -0,344816 Y: -0,826412 Z: -0,445135

magnitude:

visual 0,88 (observed) source: 30
photovisual 1,2 source: 2
photographic 2,6 source: 2

spectral information:

spectral class M0 source: 96
Morgan-Keenan M1.5Iab-Ib source: 25
B-magnitude 2,79 0,05 B-V-magnitude 1,83
U-magnitude 4,13 0,05 U-B-magnitude 1,34

variability information:

source of data: 30
variability type 172
var. amplitude 0,28

double/multiple star system information:

source of data: 19
separation between brightest and second brightest component 2,9 arcsec
magnitude difference between brightest and second brightest component 4,4
position angle 273

component magnitude spectral class catalogue(s)/name(s)
A 0,88 M0 Antares, a Scorpii, 21 Sco, HR 6134, HD 148478, SAO 184415
B 1,41 -

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
30 GCVS, 4th edition
Kholopov, P.N., et al., General Catalogue of Variable Stars, fourth edition, Moscow: Nauka Publishing House, 1985-88
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 26min 20,206sec DEC: -26 19' 21,95'' 0,004 arcsec
position (J2000) RA: 16h 29min 24,449sec DEC: -26 25' 55,17''
proper motion J1950 (FK4) RA: -0,0005 arcsec/a DEC: -0,023 arcsec/a 0,001 arcsec/a in RA
0,001 arcsec/a in DEC
proper motion J2000 (FK5) RA: -0,0006 arcsec/a DEC: -0,021 arcsec/a
source of proper motion data Determined by source catalog

magnitude:

visual 1,1 (accuracy: 2 decimals)
source of visual magnitude data Combined magnitude of component stars.

spectral information:

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

remarks for duplicity and variability

Double star - see source catalog for source

catalogues

source catalogue FK4, catalogue number: 616
Durchmusterung CD-2611359
Boss General Catalogue 22157
Henry Draper Catalogue 148478

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

position and proper motion:

position (J2000) RA: 16h 29,4min DEC: -26 26'
proper motion (J2000) RA: -0,01 arcsec/a DEC: -0,02 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
- 1847 often 273 3,3'' 0,96 5,4 M1 GNT 1
1989 - 2,9''

discoverer information:

discoverer code discoverer reference
GNT 1 - -

notes:

note Alpha Sco. A premature orbit has been computed. Composite spectrum; M1.5Iab-Ib+B4Ve. Variable.

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

position:

position (J1900) RA: 16h 23,3min DEC: -26 13'

magnitudes, spectral classes, orbital elements:

author: P. Baize
date of observation: 1971
spectral class component B: M1Ib
spectral class component B: M1Ib
period [y]: 878
semi-major axis [arcsec]: 2,9
inclination [deg]: 90
node [deg]: 93,7
eccentricity: 0,1
time of periastron passage: 1461
grade: indeterminate
reference: Circ. Inf. No. 76, 1978.
notes The primary is variable: irregular or semiregular with a trace of a 5.8 yr period.