s Coronae Borealis
| catalogues and names | s CrB, TZ CrB, 17 CrB, HR 6063, HD 146361, SAO 65165, WDS 16147+3352A |
| constellation | Corona Borealis |
data from The Bright Star Catalogue, 5th Revised Ed. (Preliminary Version) (Hoffleit+, 1991)
position, motion, parallax:
| position (J2000) | RA: 16h 14min 40,8sec | DEC: +33° 51' 31'' |
| position (J1900) | RA: 16h 10min 55,9sec | DEC: +34° 6' 42'' |
| proper motion (J2000) | RA: -0,271 arcsec/a | DEC: -0,079 arcsec/a |
| radial velocity | -11 km/s note: spectroscopic binaries, double lined spectra note: orbital data avaible |
|
| rotational velocity | =<25 km/s (uncertain) (variable) | |
| trigonometric parallax | 0,045 arcsec | |
| note (category: dynamical parallaxes): | 0.048". |
magnitude
| visual magnitude | 5,64 (V on UBV Johnson system) |
spectral / color information
| spectral class | G0VCaIIe |
| B-V-magnitude | 0,51 |
| U-B-magnitude | 0 |
variability information
| variable star identification | TZ CrB |
| note (category: variability): | ADS 9979A, Delta Sct, amp. 0.05V, 1.139789d, with possible secondary period of 0.1d. ADS 9979D = NSV 7576, 10.8v optical, suspected var. in 1868, not confirmed. |
double/multiple star system information
| number of components of multiple star system | 4 |
| separation | 6,4 arcsec |
| mag difference (of double or brightest multiple) | 1 |
| component ID | AB |
| note (category: double and multiple data): | AB 5.58 F8V, 6.59 G1V, 1000.0y, a = 6.599". Radio binary: component B is HR 6064. C, 13v at 9" and D, 10.8v at 71" optical. Also, 12.5v at 633" CPM. |
| note (category: spectroscopic binaries): | ADS 9979A, mag. diff 0.2, one component the Delta Sct var. 1.1398d, K 60.1k/s, V0 -11.9k/s, msin3i 0.133, asini 0.942. Both components vsini =<25k/s. |
data from SKY2000 - Master Star Catalog (Myers+ 1997)
position, motion, parallax:
| position (J2000) | RA: 16h 14min 41,42sec | DEC: +33° 51' 28,7'' | ±0,76 arcsec | source: 18 |
| proper motion (J2000) | RA: -0,0222 arcsec/a | DEC: -0,085 arcsec/a | source: 25 | |
| radial velocity | -11 km/s | source: 25 | ||
| trigonometric parallax | 0,045 | ±0,004 arcsec | source: 25 | |
| galactic coord. (B1950) | longitude: 54,67° | latitude: 46,14° | ||
| GCI unit vector (J2000) | X: -0,368292 | Y: -0,744285 | Z: 0,557136 | |
magnitude:
| visual | 5,64 (observed) | source: 25 |
| photovisual | 5,8 | source: 2 |
| photographic | 6,3 | source: 2 |
spectral information:
| spectral class | G0 | source: 96 | |
| Morgan-Keenan | G0VCaIIe | source: 25 | |
| B-magnitude | 6,15 ±0,05 | B-V-magnitude | 0,51 |
| U-magnitude | 6,15 ±0,05 | U-B-magnitude | 0 |
variability information:
| variability type | 10 |
| var. amplitude | 0,05 |
| var. period | 1,14 |
| var. epoch | 2423870 25. March 1924, 12:00:00 UT |
| next max light | 2451618,74 15. March 2000, 05:45:36 UT |
double/multiple star system information:
| separation between brightest and second brightest component | 1,3 arcsec |
| magnitude difference between brightest and second brightest component | 0,9 |
| position angle | 89 ° |
| component | magnitude | spectral class | catalogue(s)/name(s) |
| A | 5,64 | G0 | s Coronae Borealis, 17 CrB, HR 6063, HD 146361, SAO 65165 |
| B | 6,59 | G0 | s Coronae Borealis, 17 CrB, HR 6064, HD 146362, |
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 | |
| 18 | Hipparcos Input Catalog Version 2 Annex |
| Turon, C., et al., "The Hipparcos Input Catalog, Version 2," Centre de Donnees Stellaires Information Bulletin, Vol. 43, p. 5, 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 | |
| 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 12min 48,252sec | DEC: +33° 59' 2,62'' | ±0,01 arcsec |
| position (J2000) | RA: 16h 14min 40,757sec | DEC: +33° 51' 30,66'' | |
| proper motion J1950 (FK4) | RA: -0,0221 arcsec/a | DEC: -0,08 arcsec/a | ±0,002 arcsec/a in RA ±0,002 arcsec/a in DEC |
| proper motion J2000 (FK5) | RA: -0,0218 arcsec/a | DEC: -0,079 arcsec/a | |
| source of proper motion data | Determined by source catalog | ||
magnitude:
| visual | 5,4 (accuracy: 2 decimals) |
| source of visual magnitude data | Taken from Harvard or San Luis photometry. |
spectral information:
| spectral class | G0 |
| 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: 21863 |
| Durchmusterung | BD+34 2750 |
| Boss General Catalogue | 21863 |
| Henry Draper Catalogue | 146361 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 14,7min | DEC: +33° 52' |
| proper motion (J2000) | RA: -0,27 arcsec/a | DEC: -0,09 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 | 1827 | often | 89° | 1,3'' | 5,8 | 6,7 | G0V G1V | STF2032 |
| 1988 | 233° | 6,6'' | ||||||
| AC | 1851 | 8 | 234° | 21,2'' | 5,8 | 13,3 | - | STF2032 |
| 1984 | 103° | 18'' | ||||||
| AD | 1836 | 85 | 89° | 43,8'' | 5,8 | 10,8 | - | STF2032 |
| 1984 | 84° | 84,8'' | ||||||
| BD | 1911 | 4 | 82° | 67,1'' | 6,7 | 10,8 | - | STF2032 |
| 1923 | 83° | 71,3'' |
discoverer information:
| discoverer code | discoverer | reference |
| STF2032 | Struve, F.G.W. | - |
notes:
| note | Sigma CrB. P = 1000yr., a = 6.6", motion direct. A is a Delta Scuti-type variable, TZ CrB, and double-lined spectroscopic binary, P = 1.14d. It exhibits atmo- spheric and coronal activity, and radio flares. There is a distant, 633" physical companion, L 1490-24, mag. 12.31. |
data from 4th Catalog of Orbits of Visual Binaries (Worley+, 1983)
position:
| position (J1900) | RA: 16h 10,9min | DEC: +34° 7' |
magnitudes, spectral classes, orbital elements:
| author: | W. Rabe |
| date of observation: | 1954 |
| magnitude of component A: | 5,58 |
| magnitude of component B: | 5,58 |
| spectral class component B: | G0V |
| spectral class component B: | G0V |
| period [y]: | 1000 |
| semi-major axis [arcsec]: | 6,599 |
| inclination [deg]: | 33,33 |
| node [deg]: | 7,74 (ascending) |
| equinox of node: | 1900 |
| eccentricity: | 0,78 |
| time of periastron passage: | 1828 |
| dates of ephemeris: | 1956-1970 |
| grade: | preliminary |
| reference: | Astron. Nachr. 284, 105; 1958. |
| notes | Star A is a double-lined spectroscopic binary, P = 1.14 d. A distant star (mag. about 12.5, 13') has common proper motion (P.van de Kamp, Astron. J. 48, 136; 1943). |