Homam
catalogues and names
| catalogues and names | Homam, z Peg, 42 Peg, HR 8634, HD 214923, SAO 108103, BD +10 4797, 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 (B1900) | 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 |
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| rotational velocity | 194 km/s (uncertain) (variable) | |||
| trigonometric parallax | 0.023 arcsec | |||
| galactic coordinates | longitude: 78.86° | latitude: -40.66° | ||
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 |
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 arcsec | ±0.002 arcsec | source: 25 | |
| galactic coord. (B1950) | longitude: 78.87° | latitude: -40.66° | ||
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:
| 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 (B1950) | 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 B1950 (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. |