R Muscae
catalogues and names
| catalogues and names | R Mus, HR 4820, HD 110311, SAO 251996, CP -68 1731 |
data from The Bright Star Catalogue, 5th Revised Ed. (Preliminary Version) (Hoffleit+, 1991)
position, motion, parallax:
| position (J2000) | RA: 12h 42min 5.1sec | DEC: -69° 24' 27'' | ||
| position (2000.72) | RA: 12h 42min 8sec | DEC: -69° 24' 41'' | ||
| position (B1900) | RA: 12h 35min 58.4sec | DEC: -68° 51' 31'' | ||
| proper motion (J2000) | RA: -0.004 arcsec/a | DEC: -0.002 arcsec/a | ||
| radial velocity | 4 km/s | |||
| galactic coordinates | longitude: 302.1° | latitude: -6.55° | ||
magnitude
| visual magnitude | 6.33 (V on UBV Johnson system) |
spectral / color information
| spectral class | F7Ib-G2 |
| B-V-magnitude | 0.78 |
| U-B-magnitude | 0.54 |
variability information
| variable star identification | R Mus |
| note (category: variability): | CDelta 5.89 - 6.49V, 7.510211d. Period changes. |
data from SKY2000 - Master Star Catalog (Myers+ 1997)
position, motion, parallax:
| position (J2000) | RA: 12h 42min 5.04sec | DEC: -69° 24' 27.05'' | ±0.19 arcsec | source: 16 |
| position (2000.72) | RA: 12h 42min 8sec | DEC: -69° 24' 41'' | JD: 2451806.24 | |
| proper motion (J2000) | RA: -0.0002 arcsec/a | DEC: 0.002 arcsec/a | source: 25 | |
| radial velocity | 4 km/s | source: 25 | ||
| galactic coord. (B1950) | longitude: 302.11° | latitude: -6.55° | ||
magnitude:
| visual | 5.93 (observed) | source: 30 |
| photovisual | 6.3 | source: 16 |
spectral information:
| spectral class | G5 | source: 96 | |
| Morgan-Keenan | F7Ib-G2 | source: 25 | |
| B-magnitude | 7.11 ±0.05 | B-V-magnitude | 0.78 |
| U-magnitude | 7.65 ±0.05 | U-B-magnitude | 0.54 |
variability information:
| variability type | 111 |
| var. amplitude | 0.8 |
| var. period | 7.51 |
| var. epoch | 2426496 3. June 1931, 12:00:00 UT |
| next max light | 2451812.21 24. September 2000, 17:02:24 UT |
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: 12h 39min 0.393sec | DEC: -69° 8' 0.31'' | ±0.06 arcsec |
| position (2000.72) | RA: 12h 42min 7sec | DEC: -69° 24' 40'' | JD: 2451806.24 |
| position (J2000) | RA: 12h 42min 5.149sec | DEC: -69° 24' 27.25'' | |
| proper motion B1950 (FK4) | RA: 0.0008 arcsec/a | DEC: -0.009 arcsec/a | ±0.012 arcsec/a in RA ±0.009 arcsec/a in DEC |
| proper motion J2000 (FK5) | RA: -0.0007 arcsec/a | DEC: -0.002 arcsec/a | |
| source of proper motion data | Determined by source catalog | ||
magnitude:
| visual | 5.9 (accuracy: 1 decimal) |
| source of visual magnitude data | Source cited in source catalog introduction. |
spectral information:
| spectral class | G5 |
| source of spectral data | Taken from the Henry Draper Catalogue or no spectrum in source catalog. |
remarks for duplicity and variability
| Variable star in visual magnitude in source catalog |
catalogues
| source catalogue | GC, catalogue number: 17267 |
| Durchmusterung | CP-68 1731 |
| Boss General Catalogue | 17267 |
| Henry Draper Catalogue | 110311 |
data from Combined General Catalogue of Variable Stars (Vol. I-III) (Kholopov+ 1998)
position:
| position (equinox 1950.0) | RA: 12h 39min 0.4sec | DEC: -69° 8' 0'' |
variability informations:
| variability type | DCEP | pulsating variable star |
| magnitute at max. brightness | 5.93 | |
| magnitute at min. brightness | 6.73 | |
| photometric system | visual, photovisual or Johnson's V | |
| epoch for maximum light [JD] | 2426496.288 3. June 1931, 18:54:43 UT |
|
| period [d] | 7.510211 | |
| next maximum light [JD] | 2451813.209281 25. September 2000, 17:01:22 UT |
|
| rising time | 30 % of period |
spectral information
| spectral class | F7Ib-G2 |
references
| to a study | Vol. I GCVS (see Kholopov et al. 1985-1988) |
| to a chart/photograph | Vol. II GCVS |
miscanellous
| ID in the GCVS catalogue | 56/1 |
| constellation | Musca |
| notes on existence | The star is equivalent to '0560002 S'. |
variability type description
| variability type | description |
| DCEP | These are the classical cepheids, or Delta Cep-type variables. Comparatively young objects that have left the main sequence and evolved into the instability strip of the Hertzsprung-Russell (H-R) diagram, they obey the well-known Cepheid period-luminosity relation and belong to the young disk population. DCEP stars are present in open clusters. They display a certain relation between the shapes of their light curves and their periods. |