m Muscae
catalogues and names
| catalogues and names | m Mus, mu Mus, HR 4530, HD 102584, SAO 251597, CP -66 1649 |
| constellation | Musca |
data from The Bright Star Catalogue, 5th Revised Ed. (Preliminary Version) (Hoffleit+, 1991)
position, motion, parallax:
| position (J2000) | RA: 11h 48min 14.3sec | DEC: -66° 48' 53'' | ||
| position (B1900) | RA: 11h 43min 25.7sec | DEC: -66° 15' 31'' | ||
| proper motion (J2000) | RA: 0.013 arcsec/a | DEC: -0.015 arcsec/a | ||
| radial velocity | 37 km/s | |||
| trigonometric parallax | 0.013 arcsec | |||
| galactic coordinates | longitude: 296.76° | latitude: -4.7° | ||
magnitude
| visual magnitude | 4.72 (V on UBV Johnson system) |
spectral / color information
| spectral class | K4III |
| B-V-magnitude | 1.54 |
| U-B-magnitude | 1.91 |
| R-I-magnitude |
variability information
| variable star identification | Mu Mus |
| note (category: variability): | Lb 4.6 - 4.8V. |
data from SKY2000 - Master Star Catalog (Myers+ 1997)
position, motion, parallax:
| position (J2000) | RA: 11h 48min 14.526sec | DEC: -66° 48' 53.4'' | ±0.19 arcsec | source: 16 |
| proper motion (J2000) | RA: 0.0053 arcsec/a | DEC: -0.013 arcsec/a | source: 25 | |
| radial velocity | 37 km/s | source: 25 | ||
| trigonometric parallax | 0.013 arcsec | ±0.001 arcsec | source: 25 | |
| galactic coord. (B1950) | longitude: 296.76° | latitude: -4.7° | ||
magnitude:
| visual | 4.72 (observed) | source: 25 |
| photovisual | 4.6 | source: 16 |
spectral information:
| spectral class | K5 | source: 96 | |
| Morgan-Keenan | K4III | source: 25 | |
| B-magnitude | 6.26 ±0.05 | B-V-magnitude | 1.54 |
| U-magnitude | 8.17 ±0.05 | U-B-magnitude | 1.91 |
variability information:
| variability type | 171 |
| var. amplitude | 0.2 |
sources:
| 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 | |
| 25 | Bright Star Catalogue, 5th edition |
| Hoffleit, D. and Warren, W.H. Jr., The Bright Star Catalogue, 5th Revised Edition, Version 2, 1994 | |
| 30 | GCVS, 4th edition |
| Kholopov, P.N., et al., General Catalogue of Variable Stars, fourth edition, Moscow: Nauka Publishing House, 1985-88 | |
| 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 45min 49.27sec | DEC: -66° 32' 11.82'' | ±0.029 arcsec |
| position (J2000) | RA: 11h 48min 14.328sec | DEC: -66° 48' 53.48'' | |
| proper motion B1950 (FK4) | RA: 0.0032 arcsec/a | DEC: -0.021 arcsec/a | ±0.008 arcsec/a in RA ±0.005 arcsec/a in DEC |
| proper motion J2000 (FK5) | RA: 0.0023 arcsec/a | DEC: -0.015 arcsec/a | |
| source of proper motion data | Determined by source catalog | ||
magnitude:
| visual | 4.7 (accuracy: 2 decimals) |
| source of visual magnitude data | Taken from Harvard or San Luis photometry. |
spectral information:
| spectral class | K5 |
| source of spectral data | Taken from the Henry Draper Catalogue or no spectrum in source catalog. |
catalogues
| source catalogue | GC, catalogue number: 16176 |
| Durchmusterung | CP-66 1649 |
| Boss General Catalogue | 16176 |
| Henry Draper Catalogue | 102584 |
data from Combined General Catalogue of Variable Stars (Vol. I-III) (Kholopov+ 1998)
position:
| position (equinox 1950.0) | RA: 11h 45min 49.3sec | DEC: -66° 32' 12'' |
variability informations:
| variability type | LB | pulsating variable star |
| magnitute at max. brightness | 4.6 | |
| magnitute at min. brightness | 4.8 | |
| photometric system | visual, photovisual or Johnson's V |
spectral information
| spectral class | K4III |
references
| to a study | Vol. I GCVS (see Kholopov et al. 1985-1988) |
| to a chart/photograph | no chart is avaible, but the star is contained in the 'Cape Photographic Durchmusterung' |
miscanellous
| ID in the GCVS catalogue | 56/9012 |
| constellation | Musca |
| notes on existence | The star is equivalent to '0570001 R'. |
variability type description
| variability type | description |
| LB | Slow irregular variables. The light variations of these stars show no evidence of periodicity, or any periodicity present is very poorly defined and appears only occasionally. Like for the type I, stars are often attributed to this type because of being insufficiently studied. Many type L variables are really semiregulars or belong to other types. LB Slow irregular variables of late spectral types (K, M, C, S); as a rule, they are giants (CO Cyg). This type is also ascribed, in the GCVS, to slow red irregular variables in the case of unknown spectral types and luminosities. LC Irregular variable supergiants of late spectral types having amplitudes of about 1 mag in V (TZ Cas). |