Segin
| catalogues and names | Segin, e Cas, NSV 00652, 45 Cas, HR 542, HD 11415, SAO 12031, FK5: 63 |
| other names | Ruchbah, Segin in Becvar |
| constellation | Cassiopeia |
data from The Bright Star Catalogue, 5th Revised Ed. (Preliminary Version) (Hoffleit+, 1991)
| note (category: star names): | Called Segin in Becvar; Allen gives Ruchbah, a name more commonly applied to HR 403. |
position, motion, parallax:
| position (J2000) | RA: 1h 54min 23,7sec | DEC: +63° 40' 12'' |
| position (J1900) | RA: 1h 47min 11,7sec | DEC: +63° 10' 40'' |
| proper motion (J2000) | RA: 0,032 arcsec/a | DEC: -0,021 arcsec/a |
| radial velocity | -8 km/s note: variable radial velocity |
|
| rotational velocity | 19 km/s (uncertain) (variable) | |
| trigonometric parallax | 0,01 arcsec | |
magnitude
| visual magnitude | 3,38 (V on UBV Johnson system) |
spectral / color information
| spectral class | B3III |
| B-V-magnitude | -0,15 |
| U-B-magnitude | -0,6 |
| R-I-magnitude | -0,12 |
| note (category: spectra): | Helium weak. Shell star. Usually classified B3Vp. |
variability information
| variable star identification | 652 |
miscellaneous information
| note (category: group membership): | Cas-Tau OB1; member of Pleiades group. |
data from SKY2000 - Master Star Catalog (Myers+ 1997)
position, motion, parallax:
| position (J2000) | RA: 1h 54min 23,711sec | DEC: +63° 40' 12,28'' | ±0,06 arcsec | source: 15 |
| proper motion (J2000) | RA: 0,0048 arcsec/a | DEC: -0,021 arcsec/a | source: 25 | |
| radial velocity | -8 km/s | source: 25 | ||
| trigonometric parallax | 0,01 | ±0,001 arcsec | source: 25 | |
| galactic coord. (B1950) | longitude: 129,85° | latitude: 1,65° | ||
| GCI unit vector (J2000) | X: 0,389424 | Y: 0,21231 | Z: 0,896255 | |
magnitude:
| visual | 3,38 (observed) | source: 25 |
| photovisual | 3,4 | source: 2 |
spectral information:
| spectral class | B3 | source: 96 | |
| Morgan-Keenan | B3IV:p(shell) | source: 25 | |
| B-magnitude | 3,23 ±0,05 | B-V-magnitude | -0,15 |
| U-magnitude | 2,63 ±0,05 | U-B-magnitude | -0,6 |
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: 1h 50min 46,378sec | DEC: +63° 25' 29,89'' | ±0,004 arcsec |
| position (J2000) | RA: 1h 54min 23,71sec | DEC: +63° 40' 12,27'' | |
| proper motion J1950 (FK4) | RA: 0,0049 arcsec/a | DEC: -0,015 arcsec/a | ±0,001 arcsec/a in RA ±0,001 arcsec/a in DEC |
| proper motion J2000 (FK5) | RA: 0,0048 arcsec/a | DEC: -0,021 arcsec/a | |
| source of proper motion data | Determined by source catalog | ||
magnitude:
| visual | 3,4 (accuracy: 2 decimals) |
| source of visual magnitude data | Taken from the "Henry Draper Catalogue". |
spectral information:
| spectral class | B3 |
| source of spectral data | Taken from the Henry Draper Catalogue or no spectrum in source catalog. |
catalogues
| source catalogue | FK4, catalogue number: 63 |
| Durchmusterung | BD+62 320 |
| Boss General Catalogue | 2289 |
| Henry Draper Catalogue | 11415 |
data from Combined General Catalogue of Variable Stars (suspected variables) (Kholopov+ 1998)
position:
| position (J1950) | RA: 1h 50min 46,4sec | DEC: +63° 25' 30'' |
variability informations:
| magnitute at max. brightness | 3,35 |
| magnitute at min. brightness | 3,38 |
| photometric system | visual, photovisual or Johnson's V |
spectral information
| spectral class | BP |
references
| to a study | 1165D (designation: EPSIL.CAS) |