Algorab


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

  5. Combined General Catalogue of Variable Stars (suspected variables)


catalogues and names Algorab, d Crv, NSV 05656, 7 Crv, HR 4757, HD 108767, SAO 157323, FK5: 465, WDS 12299-1631A
other names Algores, Algoral, Algorel
constellation Corvus

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

note (category: star names): Algorab; Algores; Algoral; Algorel.

object is infrared source (NASA merged infrared catalogue, Schmitz et al., 1978)

position, motion, parallax:

position (J2000) RA: 12h 29min 51,9sec DEC: -16 30' 56''
position (J1900) RA: 12h 24min 41,3sec DEC: -15 57' 31''
proper motion (J2000) RA: -0,21 arcsec/a DEC: -0,138 arcsec/a
radial velocity 9 km/s
note: variable radial velocity
rotational velocity 148 km/s (uncertain) (variable)
trigonometric parallax 0,024 arcsec

magnitude

visual magnitude 2,95
(V on UBV Johnson system)

spectral / color information

spectral class B9.5V
B-V-magnitude -0,05
U-B-magnitude -0,09
R-I-magnitude -0,04
note (category: spectra): uv indicates dB9.5, CIff.

variability information

variable star identification 5656
note (category: variability): ADS 8572A.

double/multiple star system information

separation 24,4 arcsec
mag difference (of double or brightest multiple) 5,3
note (category: double and multiple data): CPM. B is K2Ve, lithium strong.

miscellaneous information

note (category: group membership): Pleiades group.

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

position, motion, parallax:

position (J2000) RA: 12h 29min 51,855sec DEC: -16 30' 55,57'' 0,06 arcsec source: 15
proper motion (J2000) RA: -0,0146 arcsec/a DEC: -0,138 arcsec/a source: 25
radial velocity 9 km/s source: 25
trigonometric parallax 0,024 0,002 arcsec source: 25
galactic coord. (B1950) longitude: 295,49 latitude: 46,05
GCI unit vector (J2000) X: -0,950615 Y: -0,124578 Z: -0,284274

magnitude:

visual 2,95 (observed) source: 25
photovisual 3,1 source: 2
photographic 3,1 source: 2

spectral information:

spectral class A0 source: 96
Morgan-Keenan B9.5V source: 25
B-magnitude 2,9 0,05 B-V-magnitude -0,05
U-magnitude 2,82 0,05 U-B-magnitude -0,08

variability information:

source of data: 28
variability type 9
var. amplitude 0,05

double/multiple star system information:

source of data: 19
separation between brightest and second brightest component 24,1 arcsec
magnitude difference between brightest and second brightest component 5,52
position angle 214

component magnitude spectral class catalogue(s)/name(s)
A 2,95 A0 Algorab, d Corvi, 7 Crv, HR 4757, HD 108767, SAO 157323
B 8,4 -

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
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
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 27min 16,38sec DEC: -16 14' 14,14'' 0,004 arcsec
position (J2000) RA: 12h 29min 51,857sec DEC: -16 30' 55,56''
proper motion J1950 (FK4) RA: -0,0148 arcsec/a DEC: -0,143 arcsec/a 0,001 arcsec/a in RA
0,001 arcsec/a in DEC
proper motion J2000 (FK5) RA: -0,0145 arcsec/a DEC: -0,138 arcsec/a
source of proper motion data Determined by source catalog

magnitude:

visual 3,1 (accuracy: 2 decimals)
source of visual magnitude data Taken from the "Henry Draper Catalogue".

spectral information:

spectral class A0
source of spectral data Taken from the Henry Draper Catalogue or no spectrum in source catalog.

catalogues

source catalogue FK4, catalogue number: 465
Durchmusterung BD-15 3482
Boss General Catalogue 17029
Henry Draper Catalogue 108767

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

position and proper motion:

position (J2000) RA: 12h 29,9min DEC: -16 31'
proper motion (J2000) RA: -0,21 arcsec/a DEC: -0,138 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
- 1823 16 214 24,1'' 2,95 8,47 B9.5V SHJ 145

discoverer information:

discoverer code discoverer reference
SHJ 145 South & Herschel -

notes:

note Delta Crv. B is BD-15@3481. Proper motion of B -206 -129. A may be variable.

data from Combined General Catalogue of Variable Stars (suspected variables) (Kholopov+ 1998)

position:

position (J1950) RA: 12h 27min 16,4sec DEC: -16 14' 14''

variability informations:

magnitute at max. brightness 2,91
magnitute at min. brightness 2,96
photometric system visual, photovisual or Johnson's V

spectral information

spectral class B9

references

to a study 290477D (designation: ZI 940)

miscanellous

There are notes in the published catalog (Kukarkin et al.(1982)).