Marfak
catalogues and names
| catalogues and names | Marfak, m Cas, NSV 00405, 30 Cas, HR 321, HD 6582, SAO 22024, BD +54 223, FK5: 1030, WDS 01083+5455A |
| constellation | Cassiopeia |
data from The Bright Star Catalogue, 5th Revised Ed. (Preliminary Version) (Hoffleit+, 1991)
| note (category: star names): | Marfak. Name shared with HR 343. |
position, motion, parallax:
| position (J2000) | RA: 1h 8min 16.4sec | DEC: +54° 55' 13'' | ||
| position (B1900) | RA: 1h 1min 36.8sec | DEC: +54° 25' 47'' | ||
| proper motion (J2000) | RA: 3.424 arcsec/a | DEC: -1.596 arcsec/a | ||
| radial velocity | -97 km/s note: spectroscopic binaries note: orbital data avaible |
|||
| rotational velocity | 1 km/s (uncertain) (variable) | |||
| trigonometric parallax | 0.136 arcsec | |||
| galactic coordinates | longitude: 125.32° | latitude: -7.85° | ||
magnitude
| visual magnitude | 5.17 (V on UBV Johnson system) |
spectral / color information
| spectral class | G5Vb |
| B-V-magnitude | 0.69 |
| U-B-magnitude | 0.09 |
| R-I-magnitude |
| note (category: spectra): | Metal deficient star. |
variability information
| variable star identification | 405 |
double/multiple star system information
| number of components of multiple star system | 6 |
| separation | 190.5 arcsec |
| mag difference (of double or brightest multiple) | 5.8 |
| component ID | AB |
| note | Worley (1978) update of the IDS |
| note (category: double and multiple data): | A* 5.15 G5Vp, 21.43y, a = 0.186", mag. diff 2V, sep. 1.4". Subdwarf with five visual and one astrometric components. |
| note (category: spectroscopic binaries): | 8393d, K 2.8k/s, V0 -98.0k/s, asini 310. Masses 0.8 and 0.3? solar. Resolved by speckle interferometry. |
data from SKY2000 - Master Star Catalog (Myers+ 1997)
position, motion, parallax:
| position (J2000) | RA: 1h 8min 16.378sec | DEC: +54° 55' 13.41'' | ±0.06 arcsec | source: 15 |
| proper motion (J2000) | RA: 0.3972 arcsec/a | DEC: -1.596 arcsec/a | source: 25 | |
| radial velocity | -97 km/s | source: 25 | ||
| trigonometric parallax | 0.134 arcsec | ±0.013 arcsec | source: 25 | |
| galactic coord. (B1950) | longitude: 125.33° | latitude: -7.85° | ||
magnitude:
| visual | 5.17 (observed) | source: 25 |
| photovisual | 5.3 | source: 2 |
| photographic | 5.2 | source: 16 |
spectral information:
| spectral class | G5 | source: 96 | |
| Morgan-Keenan | G5Vb | source: 25 | |
| B-magnitude | 5.86 ±0.05 | B-V-magnitude | 0.69 |
| U-magnitude | 5.95 ±0.05 | U-B-magnitude | 0.09 |
double/multiple star system information:
| separation between brightest and second brightest component | 0.2 arcsec |
| position angle | 334 ° |
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 | |
| 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 | |
| 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: 1h 4min 55.686sec | DEC: +54° 40' 32.96'' | ±0.004 arcsec |
| position (J2000) | RA: 1h 8min 16.36sec | DEC: +54° 55' 13.62'' | |
| proper motion B1950 (FK4) | RA: 0.3947 arcsec/a | DEC: -1.575 arcsec/a | ±0.001 arcsec/a in RA ±0.001 arcsec/a in DEC |
| proper motion J2000 (FK5) | RA: 0.3965 arcsec/a | DEC: -1.592 arcsec/a | |
| source of proper motion data | Determined by source catalog | ||
magnitude:
| visual | 5.3 (accuracy: 2 decimals) |
| source of visual magnitude data | Taken from the "Henry Draper Catalogue". |
spectral information:
| spectral class | G5 |
| source of spectral data | Taken from the Henry Draper Catalogue or no spectrum in source catalog. |
catalogues
| source catalogue | FK4, catalogue number: 1030 |
| Durchmusterung | BD+54 223 |
| Boss General Catalogue | 1360 |
| Henry Draper Catalogue | 6582 |
data from The Washington Visual Double Star Catalog, 1996.0 (Worley+, 1996)
position and proper motion:
| position (J2000) | RA: 1h 8.3min | DEC: +54° 55' |
| proper motion (J2000) | RA: 0 arcsec/a | DEC: 0 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 |
| Aa | 1973 | 2 | 24° | 0.3'' | 5.17 | - | G5Vp | WCK |
| 1974 | 334° | 0.2'' | ||||||
| Aa-B | 1854 | 8 | 164° | 238.9'' | 5.17 | 11.1 | - | STT |
| 1924 | 235° | 210.8'' | ||||||
| Aa-C | 1907 | 1 | 145° | 205.8'' | 5.3 | 11.1 | - | BUP 14 |
| Aa-E | 1854 | 2 | 148° | 53.2'' | 5.3 | 12.3 | - | BUP 14 |
| 1907 | 145° | 87.7'' | ||||||
| CD | 1907 | 1 | 114° | 4.2'' | 11.1 | 12.8 | - | BUP 14 |
discoverer information:
| discoverer code | discoverer | reference |
| WCK | Wickes et al | |
| STT | Struve, O. | |
| BUP 14 | - | - |
notes:
| note | Mu Cas. Proper motion of A +3424 -1596 (FK5). A is an astrometric and spectroscopic binary, now resolved. |
data from 4th Catalog of Orbits of Visual Binaries (Worley+, 1983)
position:
| position (B1900) | RA: 1h 1.6min | DEC: +54° 26' |
magnitudes, spectral classes, orbital elements:
| author: | S.L. Lippincott |
| date of observation: | 1980 |
| magnitude of component A: | 5.15 |
| magnitude of component B: | 5.15 |
| spectral class component B: | G5Vp |
| spectral class component B: | G5Vp |
| period [y]: | 21.43 |
| semi-major axis [arcsec]: | 0.186 |
| inclination [deg]: | 109.5 |
| node [deg]: | 47.4 (ascending) |
| equinox of node: | 2000 |
| eccentricity: | 0.61 |
| time of periastron passage: | 1954.34 |
| reference: | Astrophys. J. 248, 1053; 1981. |
| notes | Astrometric orbit. The spectroscopic elements are somewhat different: P = 23.0, T = 1954.0, e = 0.30, = 178.0 ( T. Worek and W. Beardsley, Astrophys. J. 217, 134; 1977). The optical resolution of the companion is unconfirmed. |
| other name(s) | Mu Cas Aa-P |
data from Combined General Catalogue of Variable Stars (suspected variables) (Kholopov+ 1998)
position:
| position (equinox 1950.0) | RA: 1h 4min 55.7sec | DEC: +54° 40' 33'' |
variability informations:
| magnitute at max. brightness | 5.15 |
| magnitute at min. brightness | 5.21 |
| photometric system | visual, photovisual or Johnson's V |
spectral information
| spectral class | GP |
references
| to a study | 731201D (designation: HD 6582) |
miscanellous
| There are notes in the published catalog (Kukarkin et al.(1982)). |