s Coronae Borealis


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 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:

source of data: 30
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:

source of data: 19
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).