Saiph
| catalogues and names | Saiph, k Ori, NSV 02641, 53 Ori, HR 2004, HD 38771, SAO 132542, FK5: 220 |
| constellation | Orion |
data from The Bright Star Catalogue, 5th Revised Ed. (Preliminary Version) (Hoffleit+, 1991)
| note (category: star names): | SAIPH. |
position, motion, parallax:
| position (J2000) | RA: 5h 47min 45,4sec | DEC: -9° 40' 11'' |
| position (J1900) | RA: 5h 43min 0,8sec | DEC: -9° 42' 18'' |
| proper motion (J2000) | RA: 0,002 arcsec/a | DEC: -0,002 arcsec/a |
| radial velocity | 21 km/s note: suspected variable radial velocity |
|
| rotational velocity | 82 km/s (uncertain) (variable) | |
| trigonometric parallax | 0,015 arcsec | |
magnitude
| visual magnitude | 2,06 (V on UBV Johnson system) |
spectral / color information
| spectral class | B0.5Ia |
| B-V-magnitude | -0,17 |
| U-B-magnitude | -1,03 |
| R-I-magnitude | -0,18 |
| note (category: spectra): | Deficient in ultraviolet relative to most early-type supergiants shortward of 2800A. |
| note (category: colors): | Color excess E(B-V) = +0.07. |
variability information
| variable star identification | 2641 |
miscellaneous information
| note (category: group membership): | Ori OB1. |
| note (category: stellar radii or diameters): | Diam. 0.00044 - 0.00045". |
data from SKY2000 - Master Star Catalog (Myers+ 1997)
position, motion, parallax:
| position (J2000) | RA: 5h 47min 45,387sec | DEC: -9° 40' 10,75'' | ±0,06 arcsec | source: 15 |
| proper motion (J2000) | RA: 0,0001 arcsec/a | DEC: -0,002 arcsec/a | source: 25 | |
| radial velocity | 21 km/s | source: 25 | ||
| trigonometric parallax | 0,015 | ±0,002 arcsec | source: 25 | |
| galactic coord. (B1950) | longitude: 214,52° | latitude: -18,5° | ||
| GCI unit vector (J2000) | X: 0,052639 | Y: 0,984386 | Z: -0,167967 | |
magnitude:
| visual | 2,06 (observed) | source: 25 |
| photovisual | 2,2 | source: 2 |
| photographic | 2 | source: 2 |
spectral information:
| spectral class | B0 | source: 96 | |
| Morgan-Keenan | B0.5Ia | source: 25 | |
| B-magnitude | 1,89 ±0,05 | B-V-magnitude | -0,17 |
| U-magnitude | 0,86 ±0,05 | U-B-magnitude | -1,03 |
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: 5h 45min 23,013sec | DEC: -9° 41' 9,45'' | ±0,004 arcsec |
| position (J2000) | RA: 5h 47min 45,394sec | DEC: -9° 40' 10,86'' | |
| proper motion J1950 (FK4) | RA: -0,0002 arcsec/a | DEC: -0,005 arcsec/a | ±0,001 arcsec/a in RA ±0,001 arcsec/a in DEC |
| proper motion J2000 (FK5) | RA: 0,0002 arcsec/a | DEC: -0,004 arcsec/a | |
| source of proper motion data | Determined by source catalog | ||
magnitude:
| visual | 2,2 (accuracy: 2 decimals) |
| source of visual magnitude data | Taken from the "Henry Draper Catalogue". |
spectral information:
| spectral class | B0 |
| source of spectral data | Taken from the Henry Draper Catalogue or no spectrum in source catalog. |
catalogues
| source catalogue | FK4, catalogue number: 220 |
| Durchmusterung | BD-09 1235 |
| Boss General Catalogue | 7264 |
| Henry Draper Catalogue | 38771 |
data from Combined General Catalogue of Variable Stars (suspected variables) (Kholopov+ 1998)
position:
| position (J1950) | RA: 5h 45min 23sec | DEC: -9° 41' 9'' |
variability informations:
| magnitute at max. brightness | 2,01 |
| magnitute at min. brightness | 2,09 |
| photometric system | visual, photovisual or Johnson's V |
spectral information
| spectral class | B0 |
references
| to a study | 0807D (designation: 141G ORI) |
miscanellous
| There are notes in the published catalog (Kukarkin et al.(1982)). |