Atria


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


catalogues and names Atria, a TrA, HR 6217, HD 150798, SAO 253700, FK5: 625
constellation Triangulum Australe

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


position, motion, parallax:

position (J2000) RA: 16h 48min 39,9sec DEC: -69 1' 40''
position (J1900) RA: 16h 38min 4,3sec DEC: -68 50' 38''
proper motion (J2000) RA: 0,014 arcsec/a DEC: -0,034 arcsec/a
radial velocity -3 km/s
trigonometric parallax 0,031 arcsec

magnitude

visual magnitude 1,92
(V on UBV Johnson system)

spectral / color information

spectral class K2IIb-IIIa
B-V-magnitude 1,44
U-B-magnitude 1,56

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

position, motion, parallax:

position (J2000) RA: 16h 48min 39,869sec DEC: -69 1' 39,82'' 0,06 arcsec source: 15
proper motion (J2000) RA: 0,0026 arcsec/a DEC: -0,034 arcsec/a source: 25
radial velocity -3 km/s source: 25
trigonometric parallax 0,031 0,003 arcsec source: 25
galactic coord. (B1950) longitude: 321,54 latitude: -15,26
GCI unit vector (J2000) X: -0,109615 Y: -0,340718 Z: -0,933754

magnitude:

visual 1,92 (observed) source: 25
photovisual 1,9 source: 2
photographic 3 source: 2

spectral information:

spectral class K2 source: 96
Morgan-Keenan K2IIb-IIIa source: 25
B-magnitude 3,36 0,05 B-V-magnitude 1,44
U-magnitude 4,92 0,05 U-B-magnitude 1,56

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
15 FK5, FK5 Extension and FK5 Supplement
Fricke, W., H. Schwan and T. Lederle, "Fifth Fundamental Catalogue (FK5), Part I. The Basic Fundamental Stars," Veroff. Astronomisches Recheninstitut, No. 32, Heidelberg, Germany, 1988, and Fricke, W., H. Schwan, and T.E. Corbin, "Fifth Fundamental Catalogue (FK5), Part II. The FK5 Extension," Veröff. Astronomisches Recheninstitut, No. 33, Heidelberg, Germany, 1991
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: 16h 43min 21,059sec DEC: -68 56' 19,89'' 0,008 arcsec
position (J2000) RA: 16h 48min 39,936sec DEC: -69 1' 39,56''
proper motion J1950 (FK4) RA: 0,0052 arcsec/a DEC: -0,034 arcsec/a 0,002 arcsec/a in RA
0,002 arcsec/a in DEC
proper motion J2000 (FK5) RA: 0,0035 arcsec/a DEC: -0,032 arcsec/a
source of proper motion data Determined by source catalog

magnitude:

visual 1,9 (accuracy: 2 decimals)
source of visual magnitude data Taken from the "Henry Draper Catalogue".

spectral information:

spectral class K2
source of spectral data Taken from the Henry Draper Catalogue or no spectrum in source catalog.

catalogues

source catalogue FK4, catalogue number: 625
Durchmusterung CP-68 2822
Boss General Catalogue 22558
Henry Draper Catalogue 150798