Algorab

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

note (category: star names):

Algorab; Algores; Algoral; Algorel.

position, motion, parallax:

position (J2000)	RA: 12h 29min 51.9sec	DEC: -16° 30' 56''
position (B1900)	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
galactic coordinates	longitude: 295.48°	latitude: 46.05°

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

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 arcsec		±0.002 arcsec	source: 25
galactic coord. (B1950)	longitude: 295.49°	latitude: 46.05°

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 (B1950)	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 B1950 (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 (equinox 1950.0)

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

references

to a study

290477D (designation: ZI 940)

miscanellous

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

catalogues and names	Algorab, d Crv, NSV 05656, 7 Crv, HR 4757, HD 108767, SAO 157323, BD -15 3482, FK5: 465, WDS 12299-1631A
other names	Algores, Algoral, Algorel
constellation	Corvus