Skat
catalogues and names
| catalogues and names | Skat, d Aqr, NSV 14356, 76 Aqr, HR 8709, HD 216627, SAO 165375, BD -16 6173, FK5: 866 |
| other names | Scheat, Sheat |
| constellation | Aquarius |
data from The Bright Star Catalogue, 5th Revised Ed. (Preliminary Version) (Hoffleit+, 1991)
| note (category: star names): | Skat; Scheat; Sheat. |
position, motion, parallax:
| position (J2000) | RA: 22h 54min 39sec | DEC: -15° 49' 15'' | ||
| position (B1900) | RA: 22h 49min 20.6sec | DEC: -16° 21' 10'' | ||
| proper motion (J2000) | RA: -0.04 arcsec/a | DEC: -0.025 arcsec/a | ||
| radial velocity | 18 km/s note: variable radial velocity |
|||
| rotational velocity | 71 km/s (uncertain) (variable) | |||
| trigonometric parallax | 0.038 arcsec | |||
| galactic coordinates | longitude: 49.58° | latitude: -60.67° | ||
magnitude
| visual magnitude | 3.27 (V on UBV Johnson system) |
spectral / color information
| spectral class | A3V |
| B-V-magnitude | 0.05 |
| U-B-magnitude | 0.08 |
| R-I-magnitude |
| note (category: spectra): | Also classified A2-4III. |
variability information
| variable star identification | 14356 |
miscellaneous information
| note (category: group membership): | Sirius group. Possible Eggen group with HR 63, q.v. |
data from SKY2000 - Master Star Catalog (Myers+ 1997)
position, motion, parallax:
| position (J2000) | RA: 22h 54min 39.017sec | DEC: -15° 49' 14.95'' | ±0.06 arcsec | source: 15 |
| proper motion (J2000) | RA: -0.0028 arcsec/a | DEC: -0.025 arcsec/a | source: 25 | |
| radial velocity | 18 km/s | source: 25 | ||
| trigonometric parallax | 0.038 arcsec | ±0.004 arcsec | source: 25 | |
| galactic coord. (B1950) | longitude: 49.6° | latitude: -60.67° | ||
magnitude:
| visual | 3.27 (observed) | source: 25 |
| photovisual | 3.5 | source: 2 |
| photographic | 3.6 | source: 2 |
spectral information:
| spectral class | A2 | source: 96 | |
| Morgan-Keenan | A3V | source: 25 | |
| B-magnitude | 3.32 ±0.05 | B-V-magnitude | 0.05 |
| U-magnitude | 3.4 ±0.05 | U-B-magnitude | 0.08 |
variability information:
| variability type | 9 |
| var. amplitude | 0.04 |
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 (B1950) | RA: 22h 51min 59.902sec | DEC: -16° 5' 13.92'' | ±0.004 arcsec |
| position (J2000) | RA: 22h 54min 39.019sec | DEC: -15° 49' 14.95'' | |
| proper motion B1950 (FK4) | RA: -0.0029 arcsec/a | DEC: -0.022 arcsec/a | ±0.001 arcsec/a in RA ±0.001 arcsec/a in DEC |
| proper motion J2000 (FK5) | RA: -0.0027 arcsec/a | DEC: -0.025 arcsec/a | |
| source of proper motion data | Determined by source catalog | ||
magnitude:
| visual | 3.5 (accuracy: 2 decimals) |
| source of visual magnitude data | Taken from the "Henry Draper Catalogue". |
spectral information:
| spectral class | A2 |
| source of spectral data | Taken from the Henry Draper Catalogue or no spectrum in source catalog. |
catalogues
| source catalogue | FK4, catalogue number: 866 |
| Durchmusterung | BD-16 6173 |
| Boss General Catalogue | 31943 |
| Henry Draper Catalogue | 216627 |
data from Combined General Catalogue of Variable Stars (suspected variables) (Kholopov+ 1998)
position:
| position (equinox 1950.0) | RA: 22h 51min 59.9sec | DEC: -16° 5' 14'' |
variability informations:
| magnitute at max. brightness | 3.25 |
| magnitute at min. brightness | 3.29 |
| photometric system | visual, photovisual or Johnson's V |
spectral information
| spectral class | A3 |
references
| to a study | 731201D (designation: HD 216627) |