u Draconis
| catalogues and names |
| The Bright Star Catalogue, 5th Revised Ed. (Preliminary Version) |
| SKY2000 - Master Star Catalog |
| Smithsonian Astrophysical Observatory Star Catalog |
catalogues and names
| catalogues and names | u Dra, 52 Dra, HR 7180, HD 176524, SAO 9283, BD +71 915, FK5: 714 |
| constellation | Draco |
data from The Bright Star Catalogue, 5th Revised Ed. (Preliminary Version) (Hoffleit+, 1991)
position, motion, parallax:
| position (J2000) | RA: 18h 54min 23.9sec | DEC: +71° 17' 50'' | ||
| position (B1900) | RA: 18h 55min 37.4sec | DEC: +71° 9' 49'' | ||
| proper motion (J2000) | RA: 0.049 arcsec/a | DEC: 0.044 arcsec/a | ||
| radial velocity | -7 km/s note: spectroscopic binaries |
|||
| rotational velocity | <17 km/s (uncertain) (variable) | |||
| trigonometric parallax | 0.014 arcsec | |||
| galactic coordinates | longitude: 102.15° | latitude: 25.36° | ||
magnitude
| visual magnitude | 4.82 (V on UBV Johnson system) |
spectral / color information
| spectral class | K0IIIBa0.2 |
| B-V-magnitude | 1.15 |
| U-B-magnitude | 1.1 |
| R-I-magnitude | |
| IR-note | object is infrared source (NASA merged infrared catalogue, Schmitz et al., 1978) |
data from SKY2000 - Master Star Catalog (Myers+ 1997)
position, motion, parallax:
| position (J2000) | RA: 18h 54min 23.851sec | DEC: +71° 17' 49.92'' | ±0.06 arcsec | source: 15 |
| proper motion (J2000) | RA: 0.0102 arcsec/a | DEC: 0.044 arcsec/a | source: 25 | |
| radial velocity | -7 km/s | source: 25 | ||
| trigonometric parallax | 0.014 arcsec | ±0.001 arcsec | source: 25 | |
| galactic coord. (B1950) | longitude: 102.15° | latitude: 25.36° | ||
magnitude:
| visual | 4.82 (observed) | source: 25 |
| photovisual | 4.9 | source: 2 |
spectral information:
| spectral class | K0 | source: 96 | |
| Morgan-Keenan | K0IIICN0.5 | source: 25 | |
| B-magnitude | 5.97 ±0.05 | B-V-magnitude | 1.15 |
| U-magnitude | 7.07 ±0.05 | U-B-magnitude | 1.1 |
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: 18h 55min 0.917sec | DEC: +71° 13' 50.82'' | ±0.004 arcsec |
| position (J2000) | RA: 18h 54min 23.861sec | DEC: +71° 17' 49.93'' | |
| proper motion B1950 (FK4) | RA: 0.0094 arcsec/a | DEC: 0.045 arcsec/a | ±0.001 arcsec/a in RA ±0.001 arcsec/a in DEC |
| proper motion J2000 (FK5) | RA: 0.0103 arcsec/a | DEC: 0.044 arcsec/a | |
| source of proper motion data | Determined by source catalog | ||
magnitude:
| visual | 4.9 (accuracy: 2 decimals) |
| source of visual magnitude data | Taken from the "Henry Draper Catalogue". |
spectral information:
| spectral class | K0 |
| source of spectral data | Taken from the Henry Draper Catalogue or no spectrum in source catalog. |
catalogues
| source catalogue | FK4, catalogue number: 714 |
| Durchmusterung | BD+71 915 |
| Boss General Catalogue | 26024 |
| Henry Draper Catalogue | 176524 |