Alchiba


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 Alchiba, a Crv, 1 Crv, HR 4623, HD 105452, SAO 180505
other names Alchita, Al Minliar al Ghurab, Al Chiba
constellation Corvus

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

note (category: star names): Alchiba; Alchita; Al Minliar al Ghurab; Al Chiba.

position, motion, parallax:

position (J2000) RA: 12h 8min 24,8sec DEC: -24 43' 44''
position (J1900) RA: 12h 3min 15,2sec DEC: -24 10' 16''
proper motion (J2000) RA: 0,086 arcsec/a DEC: -0,04 arcsec/a
radial velocity 4 km/s
note: variable radial velocity
rotational velocity 16 km/s (uncertain) (variable)
trigonometric parallax 0,07 arcsec

magnitude

visual magnitude 4,02
(V on UBV Johnson system)

spectral / color information

spectral class F2III-IV
B-V-magnitude 0,32
U-B-magnitude -0,02
R-I-magnitude 0,18
note (category: spectra): Metal-deficient.

miscellaneous information

note (category: group membership): Sirius group? UMa stream.

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

position, motion, parallax:

position (J2000) RA: 12h 8min 24,806sec DEC: -24 43' 43,87'' 0,19 arcsec source: 16
proper motion (J2000) RA: 0,0068 arcsec/a DEC: -0,039 arcsec/a source: 25
radial velocity 4 km/s source: 25
trigonometric parallax 0,07 0,007 arcsec source: 25
galactic coord. (B1950) longitude: 290,67 latitude: 37,12
GCI unit vector (J2000) X: -0,907686 Y: -0,033337 Z: -0,418325

magnitude:

visual 4,02 (observed) source: 25
photovisual 4,2 source: 2
photographic 4,5 source: 2

spectral information:

spectral class F2 source: 96
Morgan-Keenan F2III-IV source: 25
B-magnitude 4,34 0,05 B-V-magnitude 0,32
U-magnitude 4,32 0,05 U-B-magnitude -0,02

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
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: 12h 5min 49,746sec DEC: -24 27' 0,13'' 0,014 arcsec
position (J2000) RA: 12h 8min 24,767sec DEC: -24 43' 44,05''
proper motion J1950 (FK4) RA: 0,0062 arcsec/a DEC: -0,045 arcsec/a 0,002 arcsec/a in RA
0,003 arcsec/a in DEC
proper motion J2000 (FK5) RA: 0,0063 arcsec/a DEC: -0,04 arcsec/a
source of proper motion data Determined by source catalog

magnitude:

visual 4,2 (accuracy: 2 decimals)
source of visual magnitude data Taken from Harvard or San Luis photometry.

spectral information:

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

catalogues

source catalogue GC, catalogue number: 16586
Durchmusterung CD-2410174
Boss General Catalogue 16586
Henry Draper Catalogue 105452