x Scorpii
catalogues and names
| catalogues and names | x Sco, HR 5977, HD 144069, SAO 159665, BD -10 4237 A, 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 (B1900) | 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 | |||
| galactic coordinates | longitude: 0.02° | latitude: 29.42° | ||
| 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 arcsec | ±0.005 arcsec | source: 25 | |
| galactic coord. (B1950) | longitude: 0.03° | latitude: 29.42° | ||
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:
| 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 (B1950) | 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 B1950 (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 (B1900) | 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. |
| other name(s) | STF 1998, Xi Sco |