e 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

  4. The Washington Visual Double Star Catalog, 1996.0


catalogues and names e Mon, 8 Mon, HR 2298, HD 44769, SAO 113810, FK5: 244, WDS 06238+0436A
constellation Monoceros

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


position, motion, parallax:

position (J2000) RA: 6h 23min 46,1sec DEC: +4 35' 34''
position (J1900) RA: 6h 18min 28,1sec DEC: +4 38' 38''
proper motion (J2000) RA: -0,018 arcsec/a DEC: 0,011 arcsec/a
radial velocity 15 km/s
note: spectroscopic binaries
rotational velocity 124 km/s (uncertain) (variable)
trigonometric parallax 0,025 arcsec

magnitude

visual magnitude 4,44
(V on UBV Johnson system)

spectral / color information

spectral class A5IV
B-V-magnitude 0,18
U-B-magnitude 0,13
R-I-magnitude 0,1

double/multiple star system information

number of components of multiple star system 3
separation 12,9 arcsec
mag difference (of double or brightest multiple) 2,2
component ID AB
note (category: double and multiple data): Binary with HR 2299. Combined light 4.30V, +0.21(B-V). Component C, 12.2v at 93".
note (category: spectroscopic binaries): 331d? Unresolved by speckle interferometry.

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

position, motion, parallax:

position (J2000) RA: 6h 23min 46,084sec DEC: +4 35' 34,24'' 0,06 arcsec source: 15
proper motion (J2000) RA: -0,0012 arcsec/a DEC: 0,011 arcsec/a source: 25
radial velocity 15 km/s source: 25
trigonometric parallax 0,025 0,002 arcsec source: 25
galactic coord. (B1950) longitude: 205,68 latitude: -4,03
GCI unit vector (J2000) X: -0,10319 Y: 0,991433 Z: 0,080074

magnitude:

visual 4,44 (observed) source: 25
photovisual 4,5 source: 2

spectral information:

spectral class A5 source: 96
Morgan-Keenan A5IV source: 25
B-magnitude 4,62 0,05 B-V-magnitude 0,18
U-magnitude 4,75 0,05 U-B-magnitude 0,13

double/multiple star system information:

source of data: 19
separation between brightest and second brightest component 12,7 arcsec
magnitude difference between brightest and second brightest component 2,28
position angle 27

component magnitude spectral class catalogue(s)/name(s)
A 4,44 A5 e Monocerotis, 8 Mon, HR 2298, HD 44769, SAO 113810
B 6,72 A5 HR 2299, HD 44770, SAO 113811

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: 6h 21min 7,05sec DEC: +4 37' 11,68'' 0,005 arcsec
position (J2000) RA: 6h 23min 46,093sec DEC: +4 35' 34,22''
proper motion J1950 (FK4) RA: -0,0013 arcsec/a DEC: 0,01 arcsec/a 0,001 arcsec/a in RA
0,001 arcsec/a in DEC
proper motion J2000 (FK5) RA: -0,0011 arcsec/a DEC: 0,011 arcsec/a
source of proper motion data Determined by source catalog

magnitude:

visual 4,5 (accuracy: 2 decimals)
source of visual magnitude data Taken from the "Henry Draper Catalogue".

spectral information:

spectral class A5
source of spectral data Taken from the Henry Draper Catalogue or no spectrum in source catalog.

catalogues

source catalogue FK4, catalogue number: 244
Durchmusterung BD+04 1236
Boss General Catalogue 8240
Henry Draper Catalogue 44769

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

position and proper motion:

position (J2000) RA: 6h 23,8min DEC: +4 36'
proper motion (J2000) RA: -0,018 arcsec/a DEC: 0,011 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 1831 39 27 13,9'' 4,44 6,72 A5IV F5V STF 900
1985 - 12,7''
AC 1911 2 254 93,6'' 4,44 12,7 - STF 900

discoverer information:

discoverer code discoverer reference
STF 900 Struve, F.G.W. -

notes:

note Epsilon Mon. A is a spectroscopic binary, P = 331d? B is BD+04@1237. Proper motion of B +034 -068.