g Comae Berenices

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

catalogues and names g Com, 15 Com, HR 4737, HD 108381, SAO 82313, FK5: 2999
constellation Coma Berenices

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: 12h 26min 56,3sec DEC: +28° 16' 6''
position (J1900) RA: 12h 21min 57,2sec DEC: +28° 49' 28''
proper motion (J2000) RA: -0,083 arcsec/a DEC: -0,08 arcsec/a
radial velocity 4 km/s
note: suspected variable radial velocity
rotational velocity <17 km/s (uncertain) (variable)
trigonometric parallax 0,003 arcsec

magnitude

visual magnitude 4,36
(V on UBV Johnson system)

spectral / color information

spectral class K1IIIFe0.5
B-V-magnitude 1,13
U-B-magnitude 1,15
R-I-magnitude 0,51

miscellaneous information

note (category: group membership): Mel 111 #129 (Coma).

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

position, motion, parallax:

position (J2000) RA: 12h 26min 56,271sec DEC: +28° 16' 6,34'' ±0,22 arcsec source: 15
proper motion (J2000) RA: -0,0063 arcsec/a DEC: -0,08 arcsec/a source: 25
radial velocity 4 km/s source: 25
trigonometric parallax 0,003 - source: 25
galactic coord. (B1950) longitude: 199,67° latitude: 84,46°
GCI unit vector (J2000) X: -0,874662 Y: -0,103283 Z: 0,473603

magnitude:

visual 4,36 (observed) source: 25
photovisual 4,6 source: 2

spectral information:

spectral class K0 source: 96
Morgan-Keenan K1IIIFe0.5 source: 25
B-magnitude 5,49 ±0,05 B-V-magnitude 1,13
U-magnitude 6,64 ±0,05 U-B-magnitude 1,15

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: 12h 24min 26,87sec DEC: +28° 32' 46,07'' ±0,01 arcsec
position (J2000) RA: 12h 26min 56,27sec DEC: +28° 16' 6,14''
proper motion J1950 (FK4) RA: -0,0064 arcsec/a DEC: -0,087 arcsec/a ±0,002 arcsec/a in RA
±0,002 arcsec/a in DEC
proper motion J2000 (FK5) RA: -0,0063 arcsec/a DEC: -0,083 arcsec/a
source of proper motion data Determined by source catalog

magnitude:

visual 4,6 (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.

catalogues

source catalogue GC, catalogue number: 16964
Durchmusterung BD+29 2288
Boss General Catalogue 16964
Henry Draper Catalogue 108381