a Octantis

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 a Oct, alf Oct, HR 8021, HD 199532, SAO 257879, FK5: 787
constellation Octans

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

position, motion, parallax:

position (J2000) RA: 21h 4min 43sec DEC: -77 1' 26''
position (J1900) RA: 20h 52min 36,4sec DEC: -77 24' 18''
proper motion (J2000) RA: 0,006 arcsec/a DEC: -0,369 arcsec/a
radial velocity 45 km/s
note: spectroscopic binaries, double lined spectra
note: orbital data avaible
rotational velocity 57 km/s (uncertain) (variable)
trigonometric parallax 0,025 arcsec


visual magnitude 5,15
(V on UBV Johnson system)

spectral / color information

spectral class A7III+G2III
B-V-magnitude 0,49
U-B-magnitude 0,13
note (category: spectra): Sr, G-band, 4152 strong.

double/multiple star system information

note (category: spectroscopic binaries): 9.073d, K 47.0k/s, V0 +45.0k/s, msin3i 0.306, asini 5.40.

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

position, motion, parallax:

position (J2000) RA: 21h 4min 42,984sec DEC: -77 1' 25,52'' 0,06 arcsec source: 15
proper motion (J2000) RA: 0,0017 arcsec/a DEC: -0,369 arcsec/a source: 25
radial velocity 45 km/s source: 25
trigonometric parallax 0,025 0,002 arcsec source: 25
galactic coord. (B1950) longitude: 315,97 latitude: -33,65
GCI unit vector (J2000) X: 0,162012 Y: -0,155478 Z: -0,974463


visual 5,15 (observed) source: 25
photovisual 5,2 source: 2

spectral information:

spectral class F2 source: 96
Morgan-Keenan A7III+G2III source: 25
B-magnitude 5,64 0,05 B-V-magnitude 0,49
U-magnitude 5,77 0,05 U-B-magnitude 0,13


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: 20h 58min 44,041sec DEC: -77 13' 1,18'' 0,009 arcsec
position (J2000) RA: 21h 4min 42,964sec DEC: -77 1' 25,35''
proper motion J1950 (FK4) RA: 0,0027 arcsec/a DEC: -0,364 arcsec/a 0,002 arcsec/a in RA
0,002 arcsec/a in DEC
proper motion J2000 (FK5) RA: 0,0015 arcsec/a DEC: -0,367 arcsec/a
source of proper motion data Determined by source catalog


visual 5,2 (accuracy: 2 decimals)
source of visual magnitude data Taken from the "Henry Draper Catalogue".

spectral information:

spectral class F2
source of spectral data Taken from the Henry Draper Catalogue or no spectrum in source catalog.


source catalogue FK4, catalogue number: 787
Durchmusterung CP-77 1474
Boss General Catalogue 29343
Henry Draper Catalogue 199532