36 Ursae Majoris
catalogues and names
| catalogues and names | 36 UMa, HR 4112, HD 90839, SAO 27670, BD +56 1459, FK5: 394, WDS 10306+5559A |
| constellation | Ursa Major |
data from The Bright Star Catalogue, 5th Revised Ed. (Preliminary Version) (Hoffleit+, 1991)
position, motion, parallax:
| position (J2000) | RA: 10h 30min 37.6sec | DEC: +55° 58' 50'' | ||
| position (B1900) | RA: 10h 24min 13.8sec | DEC: +56° 29' 36'' | ||
| proper motion (J2000) | RA: -0.176 arcsec/a | DEC: -0.03 arcsec/a | ||
| radial velocity | 9 km/s | |||
| rotational velocity | 0 km/s (uncertain) (variable) | |||
| trigonometric parallax | 0.077 arcsec | |||
| galactic coordinates | longitude: 154.29° | latitude: 51.7° | ||
magnitude
| visual magnitude | 4.84 (V on UBV Johnson system) |
spectral / color information
| spectral class | F8V |
| B-V-magnitude | 0.52 |
| U-B-magnitude | -0.01 |
| R-I-magnitude |
double/multiple star system information
| number of components of multiple star system | 3 |
| separation | 139 arcsec |
| mag difference (of double or brightest multiple) | 3.4 |
| component ID | AC |
| note (category: double and multiple data): | Triple CPM and common RV system. B = BD+56d1458, 9.94pg; C = BD+57d1266, 8.99pg. |
data from SKY2000 - Master Star Catalog (Myers+ 1997)
position, motion, parallax:
| position (J2000) | RA: 10h 30min 37.585sec | DEC: +55° 58' 50.01'' | ±0.06 arcsec | source: 15 |
| proper motion (J2000) | RA: -0.021 arcsec/a | DEC: -0.03 arcsec/a | source: 25 | |
| radial velocity | 9 km/s | source: 25 | ||
| trigonometric parallax | 0.077 arcsec | ±0.008 arcsec | source: 25 | |
| galactic coord. (B1950) | longitude: 154.29° | latitude: 51.7° | ||
magnitude:
| visual | 4.83 (observed) | source: 25 |
| photovisual | 4.8 | source: 2 |
spectral information:
| spectral class | F5 | source: 96 | |
| Morgan-Keenan | F8V | source: 25 | |
| B-magnitude | 5.35 ±0.05 | B-V-magnitude | 0.52 |
| U-magnitude | 5.34 ±0.05 | U-B-magnitude | -0.01 |
double/multiple star system information:
| separation between brightest and second brightest component | 120 arcsec |
| magnitude difference between brightest and second brightest component | 3.86 |
| position angle | 304 ° |
| component | magnitude | spectral class | catalogue(s)/name(s) |
| A | 4.83 | F5 | 36 UMa, HR 4112, HD 90839, SAO 27670 |
| B | 8.69 | K5 |
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: 10h 27min 26.446sec | DEC: +56° 14' 15.65'' | ±0.004 arcsec |
| position (J2000) | RA: 10h 30min 37.578sec | DEC: +55° 58' 50.05'' | |
| proper motion B1950 (FK4) | RA: -0.0214 arcsec/a | DEC: -0.035 arcsec/a | ±0.001 arcsec/a in RA ±0.001 arcsec/a in DEC |
| proper motion J2000 (FK5) | RA: -0.0211 arcsec/a | DEC: -0.03 arcsec/a | |
| source of proper motion data | Determined by source catalog | ||
magnitude:
| visual | 4.8 (accuracy: 2 decimals) |
| source of visual magnitude data | Taken from the "Henry Draper Catalogue". |
spectral information:
| spectral class | F5 |
| source of spectral data | Taken from the Henry Draper Catalogue or no spectrum in source catalog. |
catalogues
| source catalogue | FK4, catalogue number: 394 |
| Durchmusterung | BD+56 1459 |
| Boss General Catalogue | 14427 |
| Henry Draper Catalogue | 90839 |
data from The Washington Visual Double Star Catalog, 1996.0 (Worley+, 1996)
position and proper motion:
| position (J2000) | RA: 10h 30.6min | DEC: +55° 59' |
| proper motion (J2000) | RA: -0.176 arcsec/a | DEC: -0.03 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 |
| - | 1955 | 1 | 304° | 120'' | 4.83 | 8.69 | F6V | LDS2863 |
discoverer information:
| discoverer code | discoverer | reference |
| LDS2863 | - | - |
notes:
| note | B is BD+56@1458. |