48 Cassiopeiae
catalogues and names
| catalogues and names | 48 Cas, HR 575, HD 12111, SAO 4554, BD +70 153, WDS 02020+7054 |
| constellation | Cassiopeia |
data from The Bright Star Catalogue, 5th Revised Ed. (Preliminary Version) (Hoffleit+, 1991)
| note (category: star names): | Also called A Cas. |
position, motion, parallax:
| position (J2000) | RA: 2h 1min 57.4sec | DEC: +70° 54' 25'' | ||
| position (B1900) | RA: 1h 53min 44sec | DEC: +70° 25' 20'' | ||
| proper motion (J2000) | RA: -0.067 arcsec/a | DEC: 0.004 arcsec/a | ||
| radial velocity | -5 km/s note: spectroscopic binaries note: orbital data avaible |
|||
| rotational velocity | 67 km/s (uncertain) (variable) | |||
| trigonometric parallax | 0.035 arcsec | |||
| galactic coordinates | longitude: 128.69° | latitude: 8.83° | ||
| note (category: dynamical parallaxes): | 0.027". |
magnitude
| visual magnitude | 4.54 (V on UBV Johnson system) |
spectral / color information
| spectral class | A3IV |
| B-V-magnitude | 0.16 |
| U-B-magnitude | 0.06 |
| R-I-magnitude |
variability information
| variable star identification | 694 |
| note (category: variability): | ADS 1598B. B-A varies 1.5 - 3.0v. |
double/multiple star system information
| number of components of multiple star system | 4 |
| separation | 0.5 arcsec |
| mag difference (of double or brightest multiple) | 1.7 |
| component ID | AB |
| note (category: double and multiple data): | AB 4.71 A4V, 6.41 F2V, 60.44y, a = 0.653". Perturbation periods of 26 or 39y suspected. C, 13.6v, 24" CPM; D, 13.0v 48" optical. Additional unseen companion suspected. |
| note (category: spectroscopic binaries): | ADS 1598A, 20,146.1d, K 4.0k/s, V0 -8.5k/s, asini 776. |
miscellaneous information
| note (category: group membership): | Sirius group? |
data from SKY2000 - Master Star Catalog (Myers+ 1997)
position, motion, parallax:
| position (J2000) | RA: 2h 1min 57.359sec | DEC: +70° 54' 24.76'' | ±0.35 arcsec | source: 17 |
| proper motion (J2000) | RA: -0.0141 arcsec/a | DEC: -0.002 arcsec/a | source: 25 | |
| radial velocity | -5 km/s | source: 25 | ||
| trigonometric parallax | 0.035 arcsec | ±0.003 arcsec | source: 25 | |
| galactic coord. (B1950) | longitude: 128.69° | latitude: 8.83° | ||
magnitude:
| visual | 4.52 (observed) | source: 25 |
| photovisual | 4.6 | source: 2 |
| photographic | 4.7 | source: 16 |
spectral information:
| spectral class | A3 | source: 96 | |
| Morgan-Keenan | A3IV | source: 25 | |
| B-magnitude | 4.68 ±0.05 | B-V-magnitude | 0.16 |
| U-magnitude | 4.72 ±0.05 | U-B-magnitude | 0.04 |
double/multiple star system information:
| magnitude difference between brightest and second brightest component | 2.5 |
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: 1h 57min 48.527sec | DEC: +70° 39' 57.27'' | ±0.02 arcsec |
| position (J2000) | RA: 2h 1min 57.365sec | DEC: +70° 54' 25.35'' | |
| proper motion B1950 (FK4) | RA: -0.0131 arcsec/a | DEC: 0.01 arcsec/a | ±0.003 arcsec/a in RA ±0.002 arcsec/a in DEC |
| proper motion J2000 (FK5) | RA: -0.0137 arcsec/a | DEC: 0.004 arcsec/a | |
| source of proper motion data | Determined by source catalog | ||
magnitude:
| visual | 4.6 (accuracy: 2 decimals) |
| source of visual magnitude data | Taken from Harvard or San Luis photometry. |
spectral information:
| spectral class | A3 |
| 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: 2424 |
| Durchmusterung | BD+70 153 |
| Boss General Catalogue | 2424 |
| Henry Draper Catalogue | 12111 |
data from The Washington Visual Double Star Catalog, 1996.0 (Worley+, 1996)
position and proper motion:
| position (J2000) | RA: 2h 2min | DEC: +70° 54' |
| proper motion (J2000) | RA: -0.069 arcsec/a | DEC: -0.002 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 |
| AB | 1878 | often | ° | '' | 4.7 | 7.2 | A3V | BU 513 |
| AC | 1891 | 6 | 51° | 23.7'' | 4.6 | 13.2 | - | BU 513 |
| AD | 1898 | 3 | 83° | 47.1'' | 4.6 | 12.6 | - | BU 513 |
| 1959 | 85° | 51.1'' |
discoverer information:
| discoverer code | discoverer | reference |
| BU 513 | Burnham, S.W. | - |
notes:
| note | 48 Cas. P = 60yr., a = 0.65", motion direct. A is a spectroscopic binary, same period as the visual pair. C is physical. |
data from 4th Catalog of Orbits of Visual Binaries (Worley+, 1983)
position:
| position (B1900) | RA: 1h 53.7min | DEC: +70° 25' |
magnitudes, spectral classes, orbital elements:
| author: | W.D. Heintz |
| date of observation: | 1967 |
| magnitude of component A: | 4.75 |
| magnitude of component B: | 4.75 |
| spectral class component B: | A3IV |
| spectral class component B: | A3IV |
| period [y]: | 60.44 |
| semi-major axis [arcsec]: | 0.653 |
| inclination [deg]: | 22.8 |
| node [deg]: | 64.2 (ascending) |
| equinox of node: | 2000 |
| eccentricity: | 0.345 |
| time of periastron passage: | 1964.78 |
| dates of ephemeris: | 1968-1986 |
| grade: | definitive |
| reference: | Astron. Astrophys. 1, 249; 1969. |
| notes | Suspected sub-periods of 39 yr (Baize, Bull. Astron. Paris 12, 375; 1941) and 26 yr (Muller, J. Observateurs 32, 34; 1949) are not confirmed by later measures. The radial velocities of the primary may show a trace of a period of about 4 yr (Heintz, Astrophys.J.Suppl. 46, 247; 1981). Star C (mag. 13.6, 24") is physical. |
| other name(s) | BU 513, 48 Cas |