g Coronae Australis


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


catalogues and names g CrA, HR 7226, HD 177474, SAO 210928, WDS 19064-3704A
constellation Corona Australis

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


position, motion, parallax:

position (J2000) RA: 19h 6min 25,1sec DEC: -37 3' 48''
position (J1900) RA: 18h 59min 39,5sec DEC: -37 12' 25''
proper motion (J2000) RA: 0,096 arcsec/a DEC: -0,274 arcsec/a
radial velocity -52 km/s
note: spectroscopic binaries
rotational velocity 0 km/s (uncertain) (variable)
trigonometric parallax 0,054 arcsec
note (category: dynamical parallaxes): 0.062".

magnitude

visual magnitude 4,93
(V on UBV Johnson system)

spectral / color information

spectral class F8V
B-V-magnitude 0,52
U-B-magnitude 0

double/multiple star system information

separation 1,6 arcsec
mag difference (of double or brightest multiple) 0,1
note Worley (1978) update of the IDS
note (category: double and multiple data): AB 4.84 F8V, 5.08 F8V, 120.42y, a = 1.907". B is HR 7227. Combined mag. and colors, 4.205V, +0.52(B-V), +0.00(U-B). vsini for blend 0k/s.

miscellaneous information

note (category: group membership): Hyades group.

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

position, motion, parallax:

position (J2000) RA: 19h 6min 25,168sec DEC: -37 3' 48,36'' 0,19 arcsec source: 33
proper motion (J2000) RA: 0,008 arcsec/a DEC: -0,273 arcsec/a source: 25
radial velocity -52 km/s source: 25
trigonometric parallax 0,054 0,005 arcsec source: 25
galactic coord. (B1950) longitude: 0,17 latitude: -18,73
GCI unit vector (J2000) X: 0,228035 Y: -0,764692 Z: -0,602699

magnitude:

visual 4,93 (observed) source: 25
photovisual 3,7 source: 16
photographic 5,5 source: 2

spectral information:

spectral class F8 source: 96
Morgan-Keenan F8V source: 25
B-magnitude 5,45 0,05 B-V-magnitude 0,52
U-magnitude 5,45 0,05 U-B-magnitude 0

double/multiple star system information:

source of data: 19
separation between brightest and second brightest component 1,2 arcsec
magnitude difference between brightest and second brightest component 0,1
position angle 136

component magnitude spectral class catalogue(s)/name(s)
A 4,93 F8 g Coronae Australis, HR 7226, HD 177474, SAO 210928
B 4,99 F8 g Coronae Australis, HR 7227, HD 177475, SAO 210928

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
25 Bright Star Catalogue, 5th edition
Hoffleit, D. and Warren, W.H. Jr., The Bright Star Catalogue, 5th Revised Edition, Version 2, 1994
33 Hipparcos Main Input Catalogue Version 2
Turon, C., et al., The Hipparcos Input Catalogue, Version 2, CDS Bull. No. 43, p.5, 1993
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: 19h 3min 2,4sec DEC: -37 8' 13,47'' 0,039 arcsec
position (J2000) RA: 19h 6min 25,123sec DEC: -37 3' 47,78''
proper motion J1950 (FK4) RA: 0,0079 arcsec/a DEC: -0,273 arcsec/a 0,007 arcsec/a in RA
0,005 arcsec/a in DEC
proper motion J2000 (FK5) RA: 0,008 arcsec/a DEC: -0,274 arcsec/a
source of proper motion data Determined by source catalog

magnitude:

visual 4,3 (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: 26263
Durchmusterung CD-3713048
Boss General Catalogue 26263
Henry Draper Catalogue 177474
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: 19h 6,4min DEC: -37 4'
proper motion (J2000) RA: 0,093 arcsec/a DEC: -0,284 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
- 1834 often '' 4,9 5 F8V F8V HJ 5084

discoverer information:

discoverer code discoverer reference
HJ 5084 Herschel, J. -

notes:

note Gamma Cra. P = 122yr., a = 1.90", motion retrograde.