BE Ceti
catalogues and names
| catalogues and names | BE Cet, 9 Cet, HR 88, HD 1835, SAO 147237, BD -13 60, WDS 00229-1213 |
| constellation | Cetus |
data from The Bright Star Catalogue, 5th Revised Ed. (Preliminary Version) (Hoffleit+, 1991)
position, motion, parallax:
| position (J2000) | RA: 0h 22min 51.8sec | DEC: -12° 12' 34'' | ||
| position (2000.72) | RA: 0h 22min 54sec | DEC: -12° 12' 20'' | ||
| position (B1900) | RA: 0h 17min 44.3sec | DEC: -12° 45' 57'' | ||
| proper motion (J2000) | RA: 0.394 arcsec/a | DEC: 0.061 arcsec/a | ||
| radial velocity | -7 km/s note: variable radial velocity |
|||
| rotational velocity | 6 km/s (uncertain) (variable) | |||
| trigonometric parallax | 0.049 arcsec | |||
| galactic coordinates | longitude: 97.34° | latitude: -73.64° | ||
magnitude
| visual magnitude | 6.39 (V on UBV Johnson system) |
spectral / color information
| spectral class | G2V |
| B-V-magnitude | 0.66 |
| U-B-magnitude | 0.24 |
| IR-note | object is infrared source (Engels et al., 1982) |
variability information
| variable star identification | BE Cet |
| note (category: variability): | BY Dra, amp. 0.032V, 0.037B, 7.655d. |
double/multiple star system information
| separation | 202.1 arcsec |
| mag difference (of double or brightest multiple) | 5.4 |
| note | Worley (1978) update of the IDS |
miscellaneous information
| note (category: group membership): | Hyades group. |
data from SKY2000 - Master Star Catalog (Myers+ 1997)
position, motion, parallax:
| position (J2000) | RA: 0h 22min 51.78sec | DEC: -12° 12' 34.14'' | ±0.19 arcsec | source: 16 |
| position (2000.72) | RA: 0h 22min 54sec | DEC: -12° 12' 20'' | JD: 2451809.16 | |
| proper motion (J2000) | RA: 0.027 arcsec/a | DEC: 0.065 arcsec/a | source: 25 | |
| radial velocity | -7 km/s | source: 25 | ||
| trigonometric parallax | 0.049 arcsec | ±0.005 arcsec | source: 25 | |
| galactic coord. (B1950) | longitude: 97.37° | latitude: -73.64° | ||
magnitude:
| visual | 6.39 (observed) | source: 25 |
| photovisual | 6.4 | source: 16 |
| photographic | 7 | source: 2 |
spectral information:
| spectral class | G0 | source: 96 | |
| Morgan-Keenan | G2.5V | source: 25 | |
| B-magnitude | 7.05 ±0.05 | B-V-magnitude | 0.66 |
| U-magnitude | 7.29 ±0.05 | U-B-magnitude | 0.24 |
variability information:
| variability type | 440 |
| var. amplitude | 0 |
double/multiple star system information:
| separation between brightest and second brightest component | 202.1 arcsec |
| magnitude difference between brightest and second brightest component | 5.4 |
| position angle | 296 ° |
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 | |
| 16 | PPM North and PPM South Catalogs and PPM Supplement |
| Roser, S., and U. Bastian, "Catalogue of Positions and Proper Motions," A&AS, Vol. 74, p. 449, 1988, and Bastian, U., et al., "Catalogue of Positions and Proper Motions - South," 1993 | |
| 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 | |
| 27 | Catalog of Red Magnitudes (CRM) |
| Warren, W.H. Jr., Northern Hemisphere Catalog of Red Magnitudes, 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: 0h 20min 18.035sec | DEC: -12° 29' 14.89'' | ±0.016 arcsec |
| position (2000.72) | RA: 0h 22min 53sec | DEC: -12° 12' 23'' | JD: 2451809.16 |
| position (J2000) | RA: 0h 22min 51.77sec | DEC: -12° 12' 33.89'' | |
| proper motion B1950 (FK4) | RA: 0.0266 arcsec/a | DEC: 0.065 arcsec/a | ±0.003 arcsec/a in RA ±0.002 arcsec/a in DEC |
| proper motion J2000 (FK5) | RA: 0.0269 arcsec/a | DEC: 0.061 arcsec/a | |
| source of proper motion data | Determined by source catalog | ||
magnitude:
| visual | 6.4 (accuracy: 2 decimals) |
| source of visual magnitude data | Taken from Harvard or San Luis photometry. |
spectral information:
| spectral class | G0 |
| source of spectral data | Taken from the Henry Draper Catalogue or no spectrum in source catalog. |
catalogues
| source catalogue | GC, catalogue number: 452 |
| Durchmusterung | BD-13 60 |
| Boss General Catalogue | 452 |
| Henry Draper Catalogue | 1835 |
data from The Washington Visual Double Star Catalog, 1996.0 (Worley+, 1996)
position and proper motion:
| position (J2000) | RA: 0h 22.9min | DEC: -12° 13' |
| proper motion (J2000) | RA: 0.401 arcsec/a | DEC: 0.062 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 |
| - | 1909 | 2 | 300° | 185.1'' | 7 | 12.4 | G2V | BUP 6 |
| 1959 | 296° | 202.1'' |
discoverer information:
| discoverer code | discoverer | reference |
| BUP 6 | - | - |
notes:
| note | 9 Cet. |
data from Combined General Catalogue of Variable Stars (Vol. I-III) (Kholopov+ 1998)
position:
| position (equinox 1950.0) | RA: 0h 20min 18sec | DEC: -12° 29' 15'' |
variability informations:
| variability type | BY | rotating variable star |
| magnitute at max. brightness | 6.38 | |
| magnitute at min. brightness | 6.43 | |
| photometric system | visual, photovisual or Johnson's V |
references
| to a study | P.F.Chugainov, Izv Krym Astr Obs 67,42,1983. |
| to a chart/photograph | no chart is avaible, but the star is contained in the 'Bonner Durchmusterung' |
miscanellous
| ID in the GCVS catalogue | 21/83 |
| constellation | Cetus |
| notes on existence | The star is equivalent to '67009'. |
variability type description
| variability type | description |
| BY | BY Draconis-type variables, which are emission-line dwarfs of dKe-dMe spectral type showing quasiperiodic light changes with periods from a fraction of a day to 120 days and amplitudes from several hundredths to 0.5 mag in V. The light variability is caused by axial rotation of a star with a variable degree of nonuniformity of the surface brightness (spots) and chromospheric activity. Some of these stars also show flares similar to those of UV Cet stars, and in those cases they also belong to the latter type and are simultaneously considered eruptive variables. |