a Monocerotis


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 a Mon, 26 Mon, HR 2970, HD 61935, SAO 134986, FK5: 293
constellation Monoceros

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

note (category: star names): In early catalogues called Gamma Mon; HR 2227 now called Gamma, was Alpha in BAC and numerous older catalogues.

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

position, motion, parallax:

position (J2000) RA: 7h 41min 14,8sec DEC: -9 33' 4''
position (J1900) RA: 7h 36min 28,1sec DEC: -9 19' 4''
proper motion (J2000) RA: -0,073 arcsec/a DEC: -0,019 arcsec/a
radial velocity 11 km/s
rotational velocity <17 km/s (uncertain) (variable)
trigonometric parallax 0,024 arcsec

magnitude

visual magnitude 3,93
(V on UBV Johnson system)

spectral / color information

spectral class K0III
B-V-magnitude 1,02
U-B-magnitude 0,88
R-I-magnitude 0,52

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

position, motion, parallax:

position (J2000) RA: 7h 41min 14,835sec DEC: -9 33' 4,19'' 0,06 arcsec source: 15
proper motion (J2000) RA: -0,0049 arcsec/a DEC: -0,019 arcsec/a source: 25
radial velocity 11 km/s source: 25
trigonometric parallax 0,024 0,002 arcsec source: 25
galactic coord. (B1950) longitude: 227,19 latitude: 6,52
GCI unit vector (J2000) X: -0,421618 Y: 0,891463 Z: -0,165928

magnitude:

visual 3,93 (observed) source: 25
photovisual 4,1 source: 2
photographic 5,1 source: 2

spectral information:

spectral class K0 source: 96
Morgan-Keenan G9IIIFe-1 source: 25
B-magnitude 4,95 0,05 B-V-magnitude 1,02
U-magnitude 5,83 0,05 U-B-magnitude 0,88

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: 7h 38min 51,466sec DEC: -9 25' 59,53'' 0,006 arcsec
position (J2000) RA: 7h 41min 14,846sec DEC: -9 33' 4,28''
proper motion J1950 (FK4) RA: -0,0052 arcsec/a DEC: -0,024 arcsec/a 0,002 arcsec/a in RA
0,002 arcsec/a in DEC
proper motion J2000 (FK5) RA: -0,0048 arcsec/a DEC: -0,02 arcsec/a
source of proper motion data Determined by source catalog

magnitude:

visual 4,1 (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: 293
Durchmusterung BD-09 2172
Boss General Catalogue 10345
Henry Draper Catalogue 61935