R Centauri
catalogues and names
| catalogues and names | R Cen, HR 5326, HD 124601, SAO 241580, CP -59 5476, WDS 14166-5955 |
data from The Bright Star Catalogue, 5th Revised Ed. (Preliminary Version) (Hoffleit+, 1991)
position, motion, parallax:
| position (J2000) | RA: 14h 16min 34.2sec | DEC: -59° 54' 50'' | ||
| position (2000.72) | RA: 14h 16min 37sec | DEC: -59° 55' 2'' | ||
| position (B1900) | RA: 14h 9min 21.8sec | DEC: -59° 26' 52'' | ||
| proper motion (J2000) | RA: -0.019 arcsec/a | DEC: -0.018 arcsec/a | ||
| radial velocity | -20 km/s note: variable radial velocity |
|||
| galactic coordinates | longitude: 313.42° | latitude: 1.21° | ||
magnitude
| visual magnitude | 6.39 (V on UBV Johnson system) |
spectral / color information
| spectral class | M5IIe |
| B-V-magnitude | 2.04 |
| U-B-magnitude | 1.24 |
| R-I-magnitude | |
| IR-note | object is infrared source (NASA merged infrared catalogue, Schmitz et al., 1978) |
| note (category: spectra): | Also classified M4e-M8IIe. H2O maser. |
variability information
| variable star identification | R Cen |
| note (category: variability): | I 1240A, M 5.3 - 11.8v, 546.2d. |
double/multiple star system information
| separation | 28 arcsec |
| mag difference (of double or brightest multiple) | 6.9 |
| note | Worley (1978) update of the IDS |
data from SKY2000 - Master Star Catalog (Myers+ 1997)
position, motion, parallax:
| position (J2000) | RA: 14h 16min 34.277sec | DEC: -59° 54' 49.34'' | ±0.19 arcsec | source: 16 |
| position (2000.72) | RA: 14h 16min 37sec | DEC: -59° 55' 1'' | JD: 2451806.35 | |
| proper motion (J2000) | RA: -0.0022 arcsec/a | DEC: -0.006 arcsec/a | source: 25 | |
| radial velocity | -20 km/s | source: 25 | ||
| galactic coord. (B1950) | longitude: 313.42° | latitude: 1.21° | ||
magnitude:
| visual | 6.39 (observed) | source: 25 |
| photovisual | 6.8 | source: 16 |
spectral information:
| spectral class | M0 | source: 96 | |
| Morgan-Keenan | M5IIe | source: 25 | |
| B-magnitude | 8.43 ±0.05 | B-V-magnitude | 2.04 |
| U-magnitude | 9.67 ±0.05 | U-B-magnitude | 1.24 |
variability information:
| variability type | 180 |
| var. amplitude | 6.5 |
| var. period | 546.2 |
| var. epoch | 2441942 16. September 1973, 12:00:00 UT |
| next max light | 2452319.8 14. February 2002, 07:12:00 UT |
double/multiple star system information:
| separation between brightest and second brightest component | 28 arcsec |
| magnitude difference between brightest and second brightest component | 5.8 |
| position angle | 218 ° |
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 | |
| 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 | |
| 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: 14h 12min 56.901sec | DEC: -59° 40' 55.23'' | ±0.037 arcsec |
| position (2000.72) | RA: 14h 16min 38sec | DEC: -59° 55' 1'' | JD: 2451806.35 |
| position (J2000) | RA: 14h 16min 34.217sec | DEC: -59° 54' 50.29'' | |
| proper motion B1950 (FK4) | RA: -0.0018 arcsec/a | DEC: -0.022 arcsec/a | ±0.009 arcsec/a in RA ±0.009 arcsec/a in DEC |
| proper motion J2000 (FK5) | RA: -0.0026 arcsec/a | DEC: -0.018 arcsec/a | |
| source of proper motion data | Determined by source catalog | ||
magnitude:
| visual | 5.3 (accuracy: 1 decimal) |
| source of visual magnitude data | Source cited in source catalog introduction. |
spectral information:
| spectral class | M4e |
| source of spectral data | Taken from the Henry Draper Catalogue or no spectrum in source catalog. |
remarks for duplicity and variability
| Both double and variable, in either visual or photographic magnitudes |
catalogues
| source catalogue | GC, catalogue number: 19234 |
| Durchmusterung | CP-59 5476 |
| Boss General Catalogue | 19234 |
| Henry Draper Catalogue | 124601 |
data from The Washington Visual Double Star Catalog, 1996.0 (Worley+, 1996)
position and proper motion:
| position (J2000) | RA: 14h 16.6min | DEC: -59° 55' |
| proper motion (J2000) | RA: -0.015 arcsec/a | DEC: -0.009 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 |
| - | 1900 | 1 | 218° | 28'' | 6.39 | 12.2 | M5IIev | I 366 |
discoverer information:
| discoverer code | discoverer | reference |
| I 366 | Innes, R.T.A. | - |
notes:
| note | A is the Mira-type variable R Cen. |
data from Combined General Catalogue of Variable Stars (Vol. I-III) (Kholopov+ 1998)
position:
| position (equinox 1950.0) | RA: 14h 12min 56.9sec | DEC: -59° 40' 55'' |
variability informations:
| variability type | M | pulsating variable star |
| magnitute at max. brightness | 5.3 | |
| magnitute at min. brightness | 11.8 | |
| photometric system | visual, photovisual or Johnson's V | |
| epoch for maximum light [JD] | 2441942 16. September 1973, 12:00:00 UT |
|
| period [d] | 546.2 | |
| next maximum light [JD] | 2452319.8 14. February 2002, 07:12:00 UT |
spectral information
| spectral class | M4e-M8IIe |
references
| to a study | the main characteristics of the star was determined by the authors themselves |
| to a chart/photograph | Vol. I GCVS (see Kholopov et al. 1985-1988) |
miscanellous
| ID in the GCVS catalogue | 19/1 |
| constellation | Centaurus |
| notes on existence | The star is equivalent to '0190002 S'. |
| There are notes in published catalog. | |
variability type description
| variability type | description |
| M | Mira (Omicron) Ceti-type variables. These are long-period variable giants with characteristic late-type emission spectra (Me, Ce, Se) and light amplitudes from 2.5 to 11 mag in V. Their periodicity is well pronounced, and the periods lie in the range between 80 and 1000 days. Infrared amplitudes are usually less than in the visible and may be <2.5 mag. For example, in the K band they usually do not exceed 0.9 mag. If the amplitudes exceed 1 - 1.5 mag , but it is not certain that the true light amplitude exceeds 2.5 mag, the symbol "M" is followed by a colon, or the star is attributed to the semiregular class with a colon following the symbol for that type (SR). |