k2Coronae 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 k2CrA, HR 6953, HD 170867, SAO 210295, WDS 18334-3844
constellation Corona Australis

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


position, motion, parallax:

position (J2000) RA: 18h 33min 23,1sec DEC: -38 43' 34''
position (J1900) RA: 18h 26min 29,3sec DEC: -38 47' 53''
proper motion (J2000) RA: -0,003 arcsec/a DEC: -0,03 arcsec/a
radial velocity -20 km/s

magnitude

visual magnitude 5,65
(V on UBV Johnson system)

spectral / color information

spectral class B9V
B-V-magnitude -0,06

double/multiple star system information

separation 21,4 arcsec
mag difference (of double or brightest multiple) 0,7
note Worley (1978) update of the IDS
note (category: double and multiple data): CPM with HR 6952.

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

position, motion, parallax:

position (J2000) RA: 18h 33min 23,076sec DEC: -38 43' 12,86'' 0,19 arcsec source: 16
proper motion (J2000) RA: -0,0001 arcsec/a DEC: -0,035 arcsec/a source: 25
radial velocity -16 km/s source: 25
galactic coord. (B1950) longitude: 356 latitude: -13,33
GCI unit vector (J2000) X: 0,11325 Y: -0,771946 Z: -0,625518

magnitude:

visual 6,32 (observed) source: 25
photovisual 5,7 source: 16

spectral information:

spectral class B9 source: 96
Morgan-Keenan A0III source: 25
B-magnitude 6,31 0,05 B-V-magnitude -0,01

double/multiple star system information:

source of data: 25
separation between brightest and second brightest component 21,4 arcsec
magnitude difference between brightest and second brightest component 0,7

component magnitude spectral class catalogue(s)/name(s)
A 5,65 B8 k2Coronae Australis, HR 6953, HD 170867, SAO 210295
B 6,32 B9 k1Coronae Australis, HR 6952, HD 170868, SAO 210296

sources:

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
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 (J1950) RA: 18h 29min 56,221sec DEC: -38 45' 51,01'' 0,032 arcsec
position (J2000) RA: 18h 33min 23,108sec DEC: -38 43' 34,45''
proper motion J1950 (FK4) RA: -0,0003 arcsec/a DEC: -0,029 arcsec/a 0,007 arcsec/a in RA
0,006 arcsec/a in DEC
proper motion J2000 (FK5) RA: -0,0003 arcsec/a DEC: -0,03 arcsec/a
source of proper motion data Determined by source catalog

magnitude:

visual 6 (accuracy: 2 decimals)
source of visual magnitude data Taken from Harvard or San Luis photometry.

spectral information:

spectral class B8
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: 25314
Durchmusterung CD-3812896
Boss General Catalogue 25314
Henry Draper Catalogue 170867

data from The Washington Visual Double Star Catalog, 1996.0 (Worley+, 1996)

position and proper motion:

position (J2000) RA: 18h 33,4min DEC: -38 44'
proper motion (J2000) RA: 0,001 arcsec/a DEC: -0,013 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
- 1836 18 359 21,4'' 5,65 6,32 B9V A0III DUN 222

discoverer information:

discoverer code discoverer reference
DUN 222 Dunlop, J. -

notes:

note Kappa (2) Cra. B is CD-38@12896, Kappa (1) Cra. Proper motion of B +001 -024.