Asellus Australis


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


catalogues and names Asellus Australis, d Cnc, 47 Cnc, HR 3461, HD 74442, SAO 98087, FK5: 326, WDS 08447+1809
constellation Cancer

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

note (category: star names): Asellus Australis.

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

position, motion, parallax:

position (J2000) RA: 8h 44min 41,1sec DEC: +18 9' 15''
position (J1900) RA: 8h 39min 0,1sec DEC: +18 31' 19''
proper motion (J2000) RA: -0,018 arcsec/a DEC: -0,228 arcsec/a
radial velocity 17 km/s
rotational velocity <17 km/s (uncertain) (variable)
trigonometric parallax 0,025 arcsec

magnitude

visual magnitude 3,94
(V on UBV Johnson system)

spectral / color information

spectral class K0III-IIIb
B-V-magnitude 1,08
U-B-magnitude 0,99
R-I-magnitude 0,54

double/multiple star system information

separation 38,4 arcsec
mag difference (of double or brightest multiple) 7,5
note (category: double and multiple data): AP, suspected double, unresolved by speckle interferometry. Visual companion 12.2v at 38" optical.

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

position, motion, parallax:

position (J2000) RA: 8h 44min 41,097sec DEC: +18 9' 15,45'' 0,06 arcsec source: 15
proper motion (J2000) RA: -0,0013 arcsec/a DEC: -0,228 arcsec/a source: 25
radial velocity 17 km/s source: 25
trigonometric parallax 0,025 0,002 arcsec source: 25
galactic coord. (B1950) longitude: 208,03 latitude: 32,9
GCI unit vector (J2000) X: -0,625542 Y: 0,715274 Z: 0,311577

magnitude:

visual 3,94 (observed) source: 25
photovisual 4,2 source: 2

spectral information:

spectral class K0 source: 96
Morgan-Keenan K0IIIb source: 25
B-magnitude 5,02 0,05 B-V-magnitude 1,08
U-magnitude 6,01 0,05 U-B-magnitude 0,99

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: 8h 41min 50,747sec DEC: +18 20' 21,83'' 0,003 arcsec
position (J2000) RA: 8h 44min 41,093sec DEC: +18 9' 15,39''
proper motion J1950 (FK4) RA: -0,0012 arcsec/a DEC: -0,233 arcsec/a 0,001 arcsec/a in RA
0,001 arcsec/a in DEC
proper motion J2000 (FK5) RA: -0,0013 arcsec/a DEC: -0,229 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 the "Henry Draper Catalogue".

spectral information:

spectral class K0
source of spectral data Taken from the Henry Draper Catalogue or no spectrum in source catalog.

catalogues

source catalogue FK4, catalogue number: 326
Durchmusterung BD+18 2027
Boss General Catalogue 12022
Henry Draper Catalogue 74442

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

position and proper motion:

position (J2000) RA: 8h 44,7min DEC: +18 9'
proper motion (J2000) RA: -0,018 arcsec/a DEC: -0,228 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
Aa 1982 3 '' 3,94 - K0III TOK
Aa-B 1852 7 121 45,8'' 3,94 12,2 - HJ 457
1958 90 38,4''

discoverer information:

discoverer code discoverer reference
TOK Tokovinin, A.A.
HJ 457 Herschel, J. -

notes:

note Delta Cnc. Aa-B is optical.