g2Leonis


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 g2Leo, NSV 04823, 41 Leo, HR 4058, HD 89485, SAO 81299, WDS 10200+1950B
constellation Leo

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


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

position, motion, parallax:

position (J2000) RA: 10h 19min 58,6sec DEC: +19 50' 26''
position (J1900) RA: 10h 14min 27,8sec DEC: +20 20' 49''
proper motion (J2000) RA: 0,312 arcsec/a DEC: -0,169 arcsec/a
radial velocity -36 km/s
note: variable radial velocity
trigonometric parallax 0,022 arcsec
note (category: dynamical parallaxes): 0.013".

magnitude

visual magnitude 3,8
(original HR magnitude)

spectral / color information

spectral class G7IIIFe-1

variability information

variable star identification 4823
note (category: variability): See HR 4057.

double/multiple star system information

number of components of multiple star system 4
separation 4,5 arcsec
mag difference (of double or brightest multiple) 1,2
component ID AB
note (category: double and multiple data): See HR 4057.

miscellaneous information

note (category: group membership): Gamma Leo group.

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

position, motion, parallax:

position (J2000) RA: 10h 19min 58,63sec DEC: +19 50' 26,2'' 0,76 arcsec source: 18
proper motion (J2000) RA: 0,0218 arcsec/a DEC: -0,164 arcsec/a source: 25
radial velocity -36 km/s source: 25
trigonometric parallax 0,022 0,002 arcsec source: 25
galactic coord. (B1950) longitude: 216,56 latitude: 54,65
GCI unit vector (J2000) X: -0,85247 Y: 0,397617 Z: 0,339405

magnitude:

visual 3,47 (observed) source: 25
photovisual 3,8 source: 2
photographic 4,8 source: 2

spectral information:

spectral class K0 source: 96
Morgan-Keenan G7IIIFe-1.5 source: 25

double/multiple star system information:

source of data: 19
separation between brightest and second brightest component 4,6 arcsec
magnitude difference between brightest and second brightest component 1,2
position angle 123

component magnitude spectral class catalogue(s)/name(s)
A 2,61 F5 Algeiba, g1Leonis, 41 Leo, HR 4057, HD 89484, SAO 81298
B 3,47 K0 g2Leonis, 41 Leo, HR 4058, HD 89485, SAO 81299

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
18 Hipparcos Input Catalog Version 2 Annex
Turon, C., et al., "The Hipparcos Input Catalog, Version 2," Centre de Donnees Stellaires Information Bulletin, Vol. 43, p. 5, 1993
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: 10h 17min 13,401sec DEC: +20 5' 39,69'' 0,021 arcsec
position (J2000) RA: 10h 19min 58,646sec DEC: +19 50' 25,65''
proper motion J1950 (FK4) RA: 0,0222 arcsec/a DEC: -0,173 arcsec/a 0,003 arcsec/a in RA
0,003 arcsec/a in DEC
proper motion J2000 (FK5) RA: 0,0221 arcsec/a DEC: -0,169 arcsec/a
source of proper motion data Determined by source catalog

magnitude:

visual 3,8 (accuracy: 2 decimals)
source of visual magnitude data Taken from Harvard or San Luis photometry.

spectral information:

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

remarks for duplicity and variability

Double star in Aitken's Double Star Catalogue (Aitken 1932)

catalogues

source catalogue GC, catalogue number: 14178
Durchmusterung BD+20 2467B
Boss General Catalogue 14178
Henry Draper Catalogue 89485

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

position and proper motion:

position (J2000) RA: 10h 20min DEC: +19 50'
proper motion (J2000) RA: 0,314 arcsec/a DEC: -0,159 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
AB 1828 often 102 2,5'' 2,6 3,8 K0III STF1424
1990 123 4,6''
AC 1851 9 294 210,7'' 2,6 9,6 - STF1424
1915 291 259,9''
AD 1904 1 302 333'' 2,6 10 - STF1424
BC 1913 1 291 264,4'' 3,8 9,3 G5III STF1424
CD 1852 7 320 112,5'' 9,3 10 - STF1424
1911 334 98,3''

discoverer information:

discoverer code discoverer reference
STF1424 Struve, F.G.W. -

notes:

note Gamma Leo. AB: Premature orbits have been computed. C is an optical companion, and is the flare star AD Leo. Speckle by Balega et al showed no companion 1987.3827. D is BD+20@2464.

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

position:

position (J1950) RA: 10h 17min 13,1sec DEC: +20 5' 43''

variability informations:

magnitute at max. brightness 1,84
magnitute at min. brightness 2,03
photometric system visual, photovisual or Johnson's V

spectral information

spectral class *

references

to a study 592735D (designation: GAMMA LEO)

miscanellous

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