l Cassiopeiae
catalogues and names
| catalogues and names | l Cas, NSV 15106, 14 Cas, HR 123, HD 2772, SAO 21489, BD +53 82, WDS 00318+5431 |
| constellation | Cassiopeia |
data from The Bright Star Catalogue, 5th Revised Ed. (Preliminary Version) (Hoffleit+, 1991)
position, motion, parallax:
| position (J2000) | RA: 0h 31min 46.4sec | DEC: +54° 31' 20'' | ||
| position (B1900) | RA: 0h 26min 15.1sec | DEC: +53° 58' 13'' | ||
| proper motion (J2000) | RA: 0.045 arcsec/a | DEC: -0.01 arcsec/a | ||
| radial velocity | -12 km/s note: variable radial velocity |
|||
| trigonometric parallax | 0.03 arcsec | |||
| galactic coordinates | longitude: 120.05° | latitude: -8.24° | ||
| note (category: dynamical parallaxes): | 0.004". |
magnitude
| visual magnitude | 4.73 (V on UBV Johnson system) |
spectral / color information
| spectral class | B8Vn |
| B-V-magnitude | -0.1 |
| U-B-magnitude | -0.35 |
| R-I-magnitude |
double/multiple star system information
| separation | 0.5 arcsec |
| mag difference (of double or brightest multiple) | 0.2 |
| note (category: double and multiple data): | 5.5 B7.5V, 5.8 B8.5V, 640y, a = 0.586". Combined mag. and colors. Components 14 and 13 solar masses. |
data from SKY2000 - Master Star Catalog (Myers+ 1997)
position, motion, parallax:
| position (J2000) | RA: 0h 31min 46.373sec | DEC: +54° 31' 20.1'' | ±0.35 arcsec | source: 17 |
| proper motion (J2000) | RA: 0.0047 arcsec/a | DEC: -0.012 arcsec/a | source: 25 | |
| radial velocity | -12 km/s | source: 25 | ||
| trigonometric parallax | 0.03 arcsec | ±0.003 arcsec | source: 25 | |
| galactic coord. (B1950) | longitude: 120.06° | latitude: -8.24° | ||
magnitude:
| visual | 4.73 (observed) | source: 25 |
| photovisual | 4.9 | source: 2 |
| photographic | 4.8 | source: 16 |
spectral information:
| spectral class | B8 | source: 96 | |
| Morgan-Keenan | B8Vn | source: 25 | |
| B-magnitude | 4.63 ±0.05 | B-V-magnitude | -0.1 |
| U-magnitude | 4.28 ±0.05 | U-B-magnitude | -0.35 |
double/multiple star system information:
| separation between brightest and second brightest component | 0.5 arcsec |
| magnitude difference between brightest and second brightest component | 0.3 |
| position angle | 192 ° |
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 | |
| 17 | ACRS |
| Corbin, T.E., and S.E. Urban, Astrographic Catalog Reference Stars, United States Naval Observatory, 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: 0h 29min 0.062sec | DEC: +54° 14' 47.51'' | ±0.017 arcsec |
| position (J2000) | RA: 0h 31min 46.411sec | DEC: +54° 31' 20.2'' | |
| proper motion B1950 (FK4) | RA: 0.005 arcsec/a | DEC: -0.005 arcsec/a | ±0.003 arcsec/a in RA ±0.002 arcsec/a in DEC |
| proper motion J2000 (FK5) | RA: 0.0052 arcsec/a | DEC: -0.01 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 Harvard or San Luis photometry. |
spectral information:
| spectral class | B8 |
| source of spectral data | Taken from the Henry Draper Catalogue or no spectrum in source catalog. |
remarks for duplicity and variability
| Double star in Aitken's Double Star Catalogue (Aitken 1932) |
catalogues
| source catalogue | GC, catalogue number: 618 |
| Durchmusterung | BD+53 82 |
| Boss General Catalogue | 618 |
| Henry Draper Catalogue | 2772 |
data from The Washington Visual Double Star Catalog, 1996.0 (Worley+, 1996)
position and proper motion:
| position (J2000) | RA: 0h 31.8min | DEC: +54° 31' |
| proper motion (J2000) | RA: 0.041 arcsec/a | DEC: -0.013 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 |
| - | 1845 | often | 122° | 0.5'' | 5.5 | 5.8 | B9V | STT 12 |
| 1994 | 192° | - |
discoverer information:
| discoverer code | discoverer | reference |
| STT 12 | Struve, O. | - |
notes:
| note | Lambda Cas. A premature orbit has been computed. |
data from 4th Catalog of Orbits of Visual Binaries (Worley+, 1983)
position:
| position (B1900) | RA: 0h 26.2min | DEC: +53° 58' |
magnitudes, spectral classes, orbital elements:
| author: | W.D. Heintz |
| date of observation: | 1960 |
| magnitude of component A: | 5.3 |
| magnitude of component B: | 5.3 |
| spectral class component B: | B8Vn |
| spectral class component B: | B8Vn |
| period [y]: | 640 |
| semi-major axis [arcsec]: | 0.586 |
| inclination [deg]: | 47.7 |
| node [deg]: | 174.4 |
| equinox of node: | 2000 |
| eccentricity: | 0 |
| time of periastron passage: | 1958 |
| dates of ephemeris: | 1960-2000 |
| grade: | indeterminate |
| reference: | Veroff. Sternw. Munchen 5, 247; 1963. |
| other name(s) | STT 12, Lambda Cas |