g Crateris
catalogues and names
| catalogues and names | g Crt, 15 Crt, HR 4405, HD 99211, SAO 156661, BD -16 3244, FK5: 431, WDS 11249-1741 |
| constellation | Crater |
data from The Bright Star Catalogue, 5th Revised Ed. (Preliminary Version) (Hoffleit+, 1991)
position, motion, parallax:
| position (J2000) | RA: 11h 24min 52.9sec | DEC: -17° 41' 2'' | ||
| position (B1900) | RA: 11h 19min 53.1sec | DEC: -17° 8' 5'' | ||
| proper motion (J2000) | RA: -0.098 arcsec/a | DEC: 0.004 arcsec/a | ||
| radial velocity | 1 km/s note: suspected variable radial velocity |
|||
| rotational velocity | 131 km/s (uncertain) (variable) | |||
| trigonometric parallax | 0.028 arcsec | |||
| galactic coordinates | longitude: 275.41° | latitude: 40.52° | ||
| note (category: dynamical parallaxes): | 0.017". |
magnitude
| visual magnitude | 4.08 (V on UBV Johnson system) |
spectral / color information
| spectral class | A5V |
| B-V-magnitude | 0.21 |
| U-B-magnitude | 0.11 |
| R-I-magnitude |
double/multiple star system information
| separation | 5.3 arcsec |
| mag difference (of double or brightest multiple) | 4.8 |
data from SKY2000 - Master Star Catalog (Myers+ 1997)
position, motion, parallax:
| position (J2000) | RA: 11h 24min 52.924sec | DEC: -17° 41' 2.47'' | ±0.06 arcsec | source: 15 |
| proper motion (J2000) | RA: -0.0069 arcsec/a | DEC: 0.004 arcsec/a | source: 25 | |
| radial velocity | 1 km/s | source: 25 | ||
| trigonometric parallax | 0.028 arcsec | ±0.003 arcsec | source: 25 | |
| galactic coord. (B1950) | longitude: 275.42° | latitude: 40.52° | ||
magnitude:
| visual | 4.08 (observed) | source: 25 |
| photovisual | 4.1 | source: 2 |
| photographic | 4.3 | source: 2 |
spectral information:
| spectral class | A5 | source: 96 | |
| Morgan-Keenan | A5V | source: 25 | |
| B-magnitude | 4.29 ±0.05 | B-V-magnitude | 0.21 |
| U-magnitude | 4.4 ±0.05 | U-B-magnitude | 0.11 |
double/multiple star system information:
| separation between brightest and second brightest component | 5.3 arcsec |
| magnitude difference between brightest and second brightest component | 3.8 |
| position angle | 94 ° |
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: 11h 22min 22.85sec | DEC: -17° 24' 32.96'' | ±0.006 arcsec |
| position (J2000) | RA: 11h 24min 52.92sec | DEC: -17° 41' 2.47'' | |
| proper motion B1950 (FK4) | RA: -0.0072 arcsec/a | DEC: -0.001 arcsec/a | ±0.001 arcsec/a in RA ±0.001 arcsec/a in DEC |
| proper motion J2000 (FK5) | RA: -0.0069 arcsec/a | DEC: 0.004 arcsec/a | |
| source of proper motion data | Determined by source catalog | ||
magnitude:
| visual | 4.1 (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: 431 |
| Durchmusterung | BD-16 3244 |
| Boss General Catalogue | 15669 |
| Henry Draper Catalogue | 99211 |
data from The Washington Visual Double Star Catalog, 1996.0 (Worley+, 1996)
position and proper motion:
| position (J2000) | RA: 11h 24.9min | DEC: -17° 41' |
| proper motion (J2000) | RA: -0.098 arcsec/a | DEC: 0.004 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 |
| - | 1877 | 16 | 98° | 5.2'' | 4.1 | 7.9 | A5V | HJ 840 |
| 1968 | 94° | 5.3'' |
discoverer information:
| discoverer code | discoverer | reference |
| HJ 840 | Herschel, J. | - |
notes:
| note | Gamma Crt. |