Kaffaljidhma
catalogues and names
| catalogues and names | Kaffaljidhma, g Cet, 86 Cet, HR 804, HD 16970, SAO 110707, BD +2 422, WDS 02433+0314 |
| other names | Al Kaff al Jidhmah |
| constellation | Cetus |
data from The Bright Star Catalogue, 5th Revised Ed. (Preliminary Version) (Hoffleit+, 1991)
| note (category: star names): | Kaffaljidhma; Al Kaff al Jidhmah. |
position, motion, parallax:
| position (J2000) | RA: 2h 43min 18sec | DEC: +3° 14' 9'' | ||
| position (B1900) | RA: 2h 38min 7.1sec | DEC: +2° 48' 52'' | ||
| proper motion (J2000) | RA: -0.142 arcsec/a | DEC: -0.152 arcsec/a | ||
| radial velocity | -5 km/s note: variable radial velocity |
|||
| rotational velocity | 183 km/s (uncertain) (variable) | |||
| trigonometric parallax | 0.052 arcsec | |||
| galactic coordinates | longitude: 168.92° | latitude: -49.38° | ||
| note (category: dynamical parallaxes): | 0.009". |
magnitude
| visual magnitude | 3.47 (V on UBV Johnson system) |
spectral / color information
| spectral class | A3V |
| B-V-magnitude | 0.09 |
| U-B-magnitude | 0.07 |
| R-I-magnitude |
double/multiple star system information
| number of components of multiple star system | 3 |
| separation | 2.8 arcsec |
| mag difference (of double or brightest multiple) | 2.7 |
| component ID | AB |
| note (category: double and multiple data): | AB binary, combined mag., colors. CPM with BD+2d418, 10.2v M6 at 840". |
miscellaneous information
| note (category: group membership): | UMa stream. |
data from SKY2000 - Master Star Catalog (Myers+ 1997)
position, motion, parallax:
| position (J2000) | RA: 2h 43min 18.044sec | DEC: +3° 14' 8.6'' | ±0.19 arcsec | source: 33 |
| proper motion (J2000) | RA: -0.0095 arcsec/a | DEC: -0.152 arcsec/a | source: 25 | |
| radial velocity | -5 km/s | source: 25 | ||
| trigonometric parallax | 0.052 arcsec | ±0.005 arcsec | source: 25 | |
| galactic coord. (B1950) | longitude: 168.93° | latitude: -49.38° | ||
magnitude:
| visual | 3.47 (observed) | source: 25 |
| photovisual | 3.6 | source: 2 |
| photographic | 3.6 | source: 2 |
spectral information:
| spectral class | A2 | source: 96 | |
| Morgan-Keenan | A3V | source: 25 | |
| B-magnitude | 3.56 ±0.05 | B-V-magnitude | 0.09 |
| U-magnitude | 3.63 ±0.05 | U-B-magnitude | 0.07 |
double/multiple star system information:
| separation between brightest and second brightest component | 2.9 arcsec |
| magnitude difference between brightest and second brightest component | 3.8 |
| position angle | 297 ° |
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 | |
| 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 | |
| 33 | Hipparcos Main Input Catalogue Version 2 |
| Turon, C., et al., The Hipparcos Input Catalogue, Version 2, CDS Bull. No. 43, p.5, 1993 | |
| 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: 2h 40min 42.397sec | DEC: +3° 1' 34.05'' | ±0.007 arcsec |
| position (J2000) | RA: 2h 43min 18.048sec | DEC: +3° 14' 8.55'' | |
| proper motion B1950 (FK4) | RA: -0.0097 arcsec/a | DEC: -0.148 arcsec/a | ±0.001 arcsec/a in RA ±0.001 arcsec/a in DEC |
| proper motion J2000 (FK5) | RA: -0.0095 arcsec/a | DEC: -0.152 arcsec/a | |
| source of proper motion data | Determined by source catalog | ||
magnitude:
| visual | 3.6 (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 HD with M stars reclassified by Miss Cannon. |
catalogues
| source catalogue | FK3, catalogue number: 96 |
| Durchmusterung | BD+02 422 |
| Boss General Catalogue | 3276 |
| Henry Draper Catalogue | 16970 |
data from The Washington Visual Double Star Catalog, 1996.0 (Worley+, 1996)
position and proper motion:
| position (J2000) | RA: 2h 43.3min | DEC: +3° 14' |
| proper motion (J2000) | RA: -0.145 arcsec/a | DEC: -0.147 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 |
| - | 1825 | often | 289° | 2.7'' | 3.6 | 7.4 | A1V | STF 299 |
| 1986 | 297° | 2.9'' |
discoverer information:
| discoverer code | discoverer | reference |
| STF 299 | Struve, F.G.W. | - |
notes:
| note | Gamma Cet. Proper motion of B -180 -121. |