Antares
The object was found in the following catalogues:
- The Bright Star Catalogue, 5th Revised Ed. (Preliminary Version)
- SKY2000 - Master Star Catalog
- Smithsonian Astrophysical Observatory Star Catalog
- The Washington Visual Double Star Catalog, 1996.0
- 4th Catalog of Orbits of Visual Binaries
- 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.
|