g Microscopii


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 g Mic, NSV 25422, HR 8039, HD 199951, SAO 212636, FK5: 1550, WDS 21013-3215
constellation Microscopium

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: 21h 1min 17,5sec DEC: -32 15' 28''
position (J1900) RA: 20h 55min 9,5sec DEC: -32 38' 55''
proper motion (J2000) RA: -0,002 arcsec/a DEC: 0,005 arcsec/a
radial velocity 18 km/s
trigonometric parallax 0,034 arcsec

magnitude

visual magnitude 4,67
(V on UBV Johnson system)

spectral / color information

spectral class G6III
B-V-magnitude 0,89
U-B-magnitude 0,54
R-I-magnitude 0,32 (Eggen)

double/multiple star system information

separation 25,7 arcsec
mag difference (of double or brightest multiple) 9
note Worley (1978) update of the IDS

miscellaneous information

note (category: group membership): In Ursa cluster?

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

position, motion, parallax:

position (J2000) RA: 21h 1min 17,465sec DEC: -32 15' 27,93'' 0,06 arcsec source: 15
proper motion (J2000) RA: -0,0002 arcsec/a DEC: 0,005 arcsec/a source: 25
radial velocity 18 km/s source: 25
trigonometric parallax 0,034 0,003 arcsec source: 25
galactic coord. (B1950) longitude: 12,35 latitude: -40,34
GCI unit vector (J2000) X: 0,601328 Y: -0,594591 Z: -0,533729

magnitude:

visual 4,67 (observed) source: 25
photovisual 4,7 source: 2
photographic 5,5 source: 2

spectral information:

spectral class G5 source: 96
Morgan-Keenan G6III source: 25
B-magnitude 5,56 0,05 B-V-magnitude 0,89
U-magnitude 6,1 0,05 U-B-magnitude 0,54

double/multiple star system information:

source of data: 19
separation between brightest and second brightest component 26 arcsec
magnitude difference between brightest and second brightest component 9
position angle 93

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: 20h 58min 13,731sec DEC: -32 27' 16,32'' 0,009 arcsec
position (J2000) RA: 21h 1min 17,475sec DEC: -32 15' 27,96''
proper motion J1950 (FK4) RA: 0 arcsec/a DEC: 0,008 arcsec/a 0,002 arcsec/a in RA
0,002 arcsec/a in DEC
proper motion J2000 (FK5) RA: -0,0001 arcsec/a DEC: 0,005 arcsec/a
source of proper motion data Determined by source catalog

magnitude:

visual 4,7 (accuracy: 2 decimals)
source of visual magnitude data Taken from the "Henry Draper Catalogue".

spectral information:

spectral class G5
source of spectral data Taken from the Henry Draper Catalogue or no spectrum in source catalog.

catalogues

source catalogue FK4, catalogue number: 1550
Durchmusterung CD-3216353
Boss General Catalogue 29331
Henry Draper Catalogue 199951

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

position and proper motion:

position (J2000) RA: 21h 1,3min DEC: -32 15'
proper motion (J2000) RA: -0,002 arcsec/a DEC: 0,005 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
- 1945 2 93 26'' 4,67 13,7 G6III RST5475

discoverer information:

discoverer code discoverer reference
RST5475 Rossiter, R.A. -

notes:

note Gamma Mic.