Homam


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 Homam, z Peg, 42 Peg, HR 8634, HD 214923, SAO 108103, FK5: 855, WDS 22415+1050
other names Homan, Humam, Al Hammam
constellation Pegasus

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

note (category: star names): Homam; Homan; Humam; Al Hammam.

position, motion, parallax:

position (J2000) RA: 22h 41min 27,7sec DEC: +10 49' 53''
position (J1900) RA: 22h 36min 28,4sec DEC: +10 18' 33''
proper motion (J2000) RA: 0,08 arcsec/a DEC: -0,013 arcsec/a
radial velocity 7 km/s
note: suspected variable radial velocity
rotational velocity 194 km/s (uncertain) (variable)
trigonometric parallax 0,023 arcsec

magnitude

visual magnitude 3,4
(V on UBV Johnson system)

spectral / color information

spectral class B8V
B-V-magnitude -0,09
U-B-magnitude -0,25
R-I-magnitude -0,07

double/multiple star system information

separation 64,3 arcsec
mag difference (of double or brightest multiple) 8,9

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

position, motion, parallax:

position (J2000) RA: 22h 41min 27,731sec DEC: +10 49' 52,85'' 0,06 arcsec source: 15
proper motion (J2000) RA: 0,0055 arcsec/a DEC: -0,012 arcsec/a source: 25
radial velocity 7 km/s source: 25
trigonometric parallax 0,023 0,002 arcsec source: 25
galactic coord. (B1950) longitude: 78,87 latitude: -40,66
GCI unit vector (J2000) X: 0,925076 Y: -0,330032 Z: 0,187919

magnitude:

visual 3,4 (observed) source: 25
photovisual 3,6 source: 2

spectral information:

spectral class B8 source: 96
Morgan-Keenan B8V source: 25
B-magnitude 3,31 0,05 B-V-magnitude -0,09
U-magnitude 3,06 0,05 U-B-magnitude -0,25

double/multiple star system information:

source of data: 19
separation between brightest and second brightest component 62,1 arcsec
magnitude difference between brightest and second brightest component 8,2
position angle 140

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: 22h 38min 57,996sec DEC: +10 34' 11,39'' 0,004 arcsec
position (J2000) RA: 22h 41min 27,732sec DEC: +10 49' 52,79''
proper motion J1950 (FK4) RA: 0,0054 arcsec/a DEC: -0,008 arcsec/a 0,001 arcsec/a in RA
0,001 arcsec/a in DEC
proper motion J2000 (FK5) RA: 0,0055 arcsec/a DEC: -0,013 arcsec/a
source of proper motion data Determined by source catalog

magnitude:

visual 3,6 (accuracy: 2 decimals)
source of visual magnitude data Taken from the "Henry Draper Catalogue".

spectral information:

spectral class B8
source of spectral data Taken from the Henry Draper Catalogue or no spectrum in source catalog.

catalogues

source catalogue FK4, catalogue number: 855
Durchmusterung BD+10 4797
Boss General Catalogue 31664
Henry Draper Catalogue 214923

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

position and proper motion:

position (J2000) RA: 22h 41,5min DEC: +10 50'
proper motion (J2000) RA: 0,08 arcsec/a DEC: -0,013 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
- 1879 5 138 64,3'' 3,4 11,6 B8V BU 1516
1925 140 62,1''
AC 1879 1 52 77'' 3,4 11 B8V BU 1516

discoverer information:

discoverer code discoverer reference
BU 1516 Burnham, S.W. -

notes:

note Zeta Peg.