23 Ursae Majoris
catalogues and names
| catalogues and names | NSV 04506, 23 UMa, HR 3757, HD 81937, SAO 14908, BD +63 845, FK5: 355, WDS 09315+6304A |
| constellation | Ursa Major |
data from The Bright Star Catalogue, 5th Revised Ed. (Preliminary Version) (Hoffleit+, 1991)
position, motion, parallax:
| position (J2000) | RA: 9h 31min 31.7sec | DEC: +63° 3' 43'' | ||
| position (B1900) | RA: 9h 23min 38.9sec | DEC: +63° 29' 57'' | ||
| proper motion (J2000) | RA: 0.109 arcsec/a | DEC: 0.028 arcsec/a | ||
| radial velocity | -10 km/s note: variable radial velocity |
|||
| rotational velocity | 140 km/s (uncertain) (variable) | |||
| trigonometric parallax | 0.041 arcsec | |||
| galactic coordinates | longitude: 150.64° | latitude: 41.74° | ||
| note (category: dynamical parallaxes): | 0.038". |
magnitude
| visual magnitude | 3.67 (V on UBV Johnson system) |
spectral / color information
| spectral class | F0IV |
| B-V-magnitude | 0.33 |
| U-B-magnitude | 0.1 |
| R-I-magnitude | |
| IR-note | object is infrared source (NASA merged infrared catalogue, Schmitz et al., 1978) |
variability information
| variable star identification | 4506 |
| note (category: variability): | Delta Sct, amp. 0.07B, about 2 hrs. |
double/multiple star system information
| number of components of multiple star system | 3 |
| separation | 22.8 arcsec |
| mag difference (of double or brightest multiple) | 5.6 |
| component ID | AB |
| note (category: double and multiple data): | AB binary. C, 10.5v at 100", optical. |
miscellaneous information
| note (category: group membership): | Sirius group? |
data from SKY2000 - Master Star Catalog (Myers+ 1997)
position, motion, parallax:
| position (J2000) | RA: 9h 31min 31.716sec | DEC: +63° 3' 42.7'' | ±0.06 arcsec | source: 15 |
| proper motion (J2000) | RA: 0.016 arcsec/a | DEC: 0.028 arcsec/a | source: 25 | |
| radial velocity | -10 km/s | source: 25 | ||
| trigonometric parallax | 0.041 arcsec | ±0.004 arcsec | source: 25 | |
| galactic coord. (B1950) | longitude: 150.64° | latitude: 41.74° | ||
magnitude:
| visual | 3.67 (observed) | source: 25 |
| photovisual | 3.8 | source: 2 |
spectral information:
| spectral class | F0 | source: 96 | |
| Morgan-Keenan | F0IV | source: 25 | |
| B-magnitude | 4 ±0.05 | B-V-magnitude | 0.33 |
| U-magnitude | 4.1 ±0.05 | U-B-magnitude | 0.1 |
double/multiple star system information:
| separation between brightest and second brightest component | 22.8 arcsec |
| magnitude difference between brightest and second brightest component | 5.54 |
| position angle | 269 ° |
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: 9h 27min 36.565sec | DEC: +63° 16' 55.11'' | ±0.004 arcsec |
| position (J2000) | RA: 9h 31min 31.721sec | DEC: +63° 3' 42.74'' | |
| proper motion B1950 (FK4) | RA: 0.0161 arcsec/a | DEC: 0.026 arcsec/a | ±0.001 arcsec/a in RA ±0.001 arcsec/a in DEC |
| proper motion J2000 (FK5) | RA: 0.0161 arcsec/a | DEC: 0.028 arcsec/a | |
| source of proper motion data | Determined by source catalog | ||
magnitude:
| visual | 3.8 (accuracy: 2 decimals) |
| source of visual magnitude data | Taken from the "Henry Draper Catalogue". |
spectral information:
| spectral class | F0 |
| source of spectral data | Taken from the Henry Draper Catalogue or no spectrum in source catalog. |
catalogues
| source catalogue | FK4, catalogue number: 355 |
| Durchmusterung | BD+63 845 |
| Boss General Catalogue | 13109 |
| Henry Draper Catalogue | 81937 |
data from The Washington Visual Double Star Catalog, 1996.0 (Worley+, 1996)
position and proper motion:
| position (J2000) | RA: 9h 31.5min | DEC: +63° 4' |
| proper motion (J2000) | RA: 0.109 arcsec/a | DEC: 0.028 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 |
| AB | 1830 | 24 | 272° | 22.8'' | 3.65 | 9.19 | F0IV | STF1351 |
| 1975 | 269° | - | ||||||
| AC | 1886 | 6 | 227° | 90.6'' | 3.8 | 10.5 | - | STF1351 |
| 1957 | 231° | 99.6'' |
discoverer information:
| discoverer code | discoverer | reference |
| STF1351 | Struve, F.G.W. | - |
notes:
| note | 23 Uma. Proper motion of B +088 +023. The primary is a Delta Scuti-type variable. |
data from Combined General Catalogue of Variable Stars (suspected variables) (Kholopov+ 1998)
position:
| position (equinox 1950.0) | RA: 9h 27min 36.6sec | DEC: +63° 16' 55'' |
variability informations:
| magnitute at max. brightness | 3.65 |
| magnitute at min. brightness | 3.68 |
| photometric system | visual, photovisual or Johnson's V |
spectral information
| spectral class | F0 |
references
| to a study | 140098D (designation: *) |
miscanellous
| There are notes in the published catalog (Kukarkin et al.(1982)). |