m Normae
catalogues and names
| catalogues and names | m Nor, mu Nor, HR 6155, HD 149038, SAO 226900, CD -43 10900, FK5: 3311 |
| constellation | Norma |
data from The Bright Star Catalogue, 5th Revised Ed. (Preliminary Version) (Hoffleit+, 1991)
position, motion, parallax:
| position (J2000) | RA: 16h 34min 5sec | DEC: -44° 2' 43'' | ||
| position (2000.72) | RA: 16h 34min 8sec | DEC: -44° 2' 48'' | ||
| position (B1900) | RA: 16h 26min 58.5sec | DEC: -43° 50' 0'' | ||
| proper motion (J2000) | RA: 0.005 arcsec/a | DEC: -0.004 arcsec/a | ||
| radial velocity | 9 km/s note: suspected variable radial velocity |
|||
| rotational velocity | 147 km/s (uncertain) (variable) | |||
| galactic coordinates | longitude: 339.38° | latitude: 2.51° | ||
magnitude
| visual magnitude | 4.94 (V on UBV Johnson system) |
spectral / color information
| spectral class | B0Ia |
| B-V-magnitude | 0.05 |
| U-B-magnitude | -0.94 |
| note (category: spectra): | Also classified O9.7Iab. |
| note (category: colors): | Color excess E(B-V) = +0.36. |
variability information
| variable star identification | Mu Nor |
| note (category: variability): | Alpha Cyg? 4.87 - 4.98V. |
miscellaneous information
| note (category: group membership): | Ara OB1a; in cluster NGC 6169 #1. |
data from SKY2000 - Master Star Catalog (Myers+ 1997)
position, motion, parallax:
| position (J2000) | RA: 16h 34min 5.043sec | DEC: -44° 2' 43.26'' | ±0.22 arcsec | source: 15 |
| position (2000.72) | RA: 16h 34min 8sec | DEC: -44° 2' 48'' | JD: 2451809.25 | |
| proper motion (J2000) | RA: 0.0005 arcsec/a | DEC: -0.004 arcsec/a | source: 25 | |
| radial velocity | 9 km/s | source: 25 | ||
| galactic coord. (B1950) | longitude: 339.38° | latitude: 2.51° | ||
magnitude:
| visual | 4.87 (observed) | source: 30 |
| photovisual | 5.2 | source: 2 |
spectral information:
| spectral class | B0 | source: 96 | |
| Morgan-Keenan | B0Ia | source: 25 | |
| B-magnitude | 4.99 ±0.05 | B-V-magnitude | 0.05 |
| U-magnitude | 4.05 ±0.05 | U-B-magnitude | -0.94 |
variability information:
| variability type | 133 |
| var. amplitude | 0.11 |
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 | |
| 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: 16h 30min 31.335sec | DEC: -43° 56' 28.69'' | ±0.027 arcsec |
| position (2000.72) | RA: 16h 34min 8sec | DEC: -44° 2' 48'' | JD: 2451809.25 |
| position (J2000) | RA: 16h 34min 4.923sec | DEC: -44° 2' 43.21'' | |
| proper motion B1950 (FK4) | RA: -0.0009 arcsec/a | DEC: -0.005 arcsec/a | ±0.007 arcsec/a in RA ±0.005 arcsec/a in DEC |
| proper motion J2000 (FK5) | RA: -0.0009 arcsec/a | DEC: -0.004 arcsec/a | |
| source of proper motion data | Determined by source catalog | ||
magnitude:
| visual | 5.1 (accuracy: 2 decimals) |
| source of visual magnitude data | Taken from Harvard or San Luis photometry. |
spectral information:
| spectral class | B0p |
| source of spectral data | Taken from the Henry Draper Catalogue or no spectrum in source catalog. |
catalogues
| source catalogue | GC, catalogue number: 22258 |
| Durchmusterung | CD-4310900 |
| Boss General Catalogue | 22258 |
| Henry Draper Catalogue | 149038 |
data from Combined General Catalogue of Variable Stars (Vol. I-III) (Kholopov+ 1998)
position:
| position (equinox 1950.0) | RA: 16h 30min 31.3sec | DEC: -43° 56' 29'' |
variability informations:
| variability type | ACYG: | pulsating variable star |
| magnitute at max. brightness | 4.87 | |
| magnitute at min. brightness | 4.98 | |
| photometric system | visual, photovisual or Johnson's V |
spectral information
| spectral class | O9.7Iab |
references
| to a chart/photograph | no chart is avaible, but the star is contained in the 'Cordoba Durchmusterung' |
miscanellous
| ID in the GCVS catalogue | 57/9012 |
| constellation | Norma |
| notes on existence | The star is equivalent to '0580001 R'. |
| There are notes in published catalog. | |
variability type description
| variability type | description |
| ACYG | Variables of the Alpha Cygni type, which are nonradially pulsating supergiants of Bep-AepIa spectral types. The light changes with amplitudes of the order of 0.1 mag often seem irregular, being caused by the superposition of many oscillations with close periods. Cycles from several days to several weeks are observed. |