Kuma
| catalogues and names | Kuma, n2Dra, NSV 09164, 25 Dra, HR 6555, HD 159560, SAO 30450, FK5: 657, WDS 17323+5510A |
| constellation | Draco |
data from The Bright Star Catalogue, 5th Revised Ed. (Preliminary Version) (Hoffleit+, 1991)
| note (category: star names): | Kuma. |
position, motion, parallax:
| position (J2000) | RA: 17h 32min 16sec | DEC: +55° 10' 23'' |
| position (J1900) | RA: 17h 30min 17,7sec | DEC: +55° 14' 28'' |
| proper motion (J2000) | RA: 0,148 arcsec/a | DEC: 0,056 arcsec/a |
| radial velocity | -16 km/s note: spectroscopic binaries note: orbital data avaible |
|
| rotational velocity | 50 km/s (uncertain) (variable) | |
| trigonometric parallax | 0,035 arcsec | |
magnitude
| visual magnitude | 4,87 (V on UBV Johnson system) |
spectral / color information
| spectral class | A4m |
| B-V-magnitude | 0,28 |
| U-B-magnitude | 0,06 |
| R-I-magnitude | 0,13 |
| note (category: spectra): | Also classified F0IVms (variable spectrum) and Am(A4/F2V/F3). |
variability information
| variable star identification | 9164 |
| note (category: variability): | ADS 10628A, I?, 4.83 - 4.95V. |
double/multiple star system information
| separation | 62,3 arcsec |
| mag difference (of double or brightest multiple) | 0 |
| note (category: double and multiple data): | Binary with HR 6554. |
| note (category: spectroscopic binaries): | 38.5958d, K 12.4k/s, V0 -16.9k/s, asini 6.34. |
data from SKY2000 - Master Star Catalog (Myers+ 1997)
position, motion, parallax:
| position (J2000) | RA: 17h 32min 16,017sec | DEC: +55° 10' 22,6'' | ±0,06 arcsec | source: 15 |
| proper motion (J2000) | RA: 0,0173 arcsec/a | DEC: 0,056 arcsec/a | source: 25 | |
| radial velocity | -16 km/s | source: 25 | ||
| trigonometric parallax | 0,035 | ±0,003 arcsec | source: 25 | |
| galactic coord. (B1950) | longitude: 83,02° | latitude: 33,12° | ||
| GCI unit vector (J2000) | X: -0,06894 | Y: -0,566925 | Z: 0,82088 | |
magnitude:
| visual | 4,87 (observed) | source: 25 |
| photovisual | 5 | source: 2 |
| photographic | 4,9 | source: 16 |
spectral information:
| spectral class | A5 | source: 96 | |
| Morgan-Keenan | A4m | source: 25 | |
| B-magnitude | 5,15 ±0,05 | B-V-magnitude | 0,28 |
| U-magnitude | 5,21 ±0,05 | U-B-magnitude | 0,06 |
double/multiple star system information:
| separation between brightest and second brightest component | 61,9 arcsec |
| magnitude difference between brightest and second brightest component | 0,01 |
| position angle | 312 ° |
| component | magnitude | spectral class | catalogue(s)/name(s) |
| A | 4,87 | A5 | Kuma, n2Draconis, 25 Dra, HR 6555, HD 159560, SAO 30450 |
| B | 4,88 | A5 | n1Draconis, 24 Dra, HR 6554, HD 159541, SAO 30447 |
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 | |
| 16 | PPM North and PPM South Catalogs and PPM Supplement |
| Roser, S., and U. Bastian, "Catalogue of Positions and Proper Motions," A&AS, Vol. 74, p. 449, 1988, and Bastian, U., et al., "Catalogue of Positions and Proper Motions - South," 1993 | |
| 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: 17h 31min 16,719sec | DEC: +55° 12' 22,82'' | ±0,005 arcsec |
| position (J2000) | RA: 17h 32min 16,01sec | DEC: +55° 10' 22,59'' | |
| proper motion J1950 (FK4) | RA: 0,0165 arcsec/a | DEC: 0,054 arcsec/a | ±0,001 arcsec/a in RA ±0,001 arcsec/a in DEC |
| proper motion J2000 (FK5) | RA: 0,0172 arcsec/a | DEC: 0,057 arcsec/a | |
| source of proper motion data | Determined by source catalog | ||
magnitude:
| visual | 5 (accuracy: 2 decimals) |
| source of visual magnitude data | Taken from the "Henry Draper Catalogue". |
spectral information:
| spectral class | A5 |
| source of spectral data | Taken from the Henry Draper Catalogue or no spectrum in source catalog. |
catalogues
| source catalogue | FK4, catalogue number: 657 |
| Durchmusterung | BD+55 1945 |
| Boss General Catalogue | 23801 |
| Henry Draper Catalogue | 159560 |
data from Combined General Catalogue of Variable Stars (suspected variables) (Kholopov+ 1998)
position:
| position (J1950) | RA: 17h 31min 16,7sec | DEC: +55° 12' 23'' |
variability informations:
| variability type | I: | eruptive variable star |
| magnitute at max. brightness | 4,83 | |
| magnitute at min. brightness | 4,95 | |
| photometric system | visual, photovisual or Johnson's V |
spectral information
| spectral class | AM |
references
| to a study | 742754D (designation: *) |
miscanellous
| There are notes in the published catalog (Kukarkin et al.(1982)). |
variability type description
| variability type | description |
| I |
Poorly studied irregular variables with unknown features of light variations and spectral types. This is a very inhomogeneous group of objects. |