Miaplacidus
catalogues and names | Miaplacidus, b Car, HR 3685, HD 80007, SAO 250495, FK5: 348 |
constellation | Carina |
data from The Bright Star Catalogue, 5th Revised Ed. (Preliminary Version) (Hoffleit+, 1991)
note (category: star names): | Miaplacidus. |
position, motion, parallax:
position (J2000) | RA: 9h 13min 12sec | DEC: -69° 43' 2'' |
position (J1900) | RA: 9h 12min 6,2sec | DEC: -69° 18' 19'' |
proper motion (J2000) | RA: -0,162 arcsec/a | DEC: 0,108 arcsec/a |
radial velocity | -5 km/s note: suspected variable radial velocity |
|
rotational velocity | 133 km/s (uncertain) (variable) | |
trigonometric parallax | 0,021 arcsec |
magnitude
visual magnitude | 1,68 (V on UBV Johnson system) |
spectral / color information
spectral class | A2IV |
B-V-magnitude | 0 |
U-B-magnitude | 0,03 |
R-I-magnitude | 0,02 |
variability information
note (category: variability): | Balmer lines show quasi periodic var. in cycles of about 35 min. |
miscellaneous information
note (category: stellar radii or diameters): | Diam. = 0.00151 - 0.00159". |
data from SKY2000 - Master Star Catalog (Myers+ 1997)
position, motion, parallax:
position (J2000) | RA: 9h 13min 11,957sec | DEC: -69° 43' 1,95'' | ±0,06 arcsec | source: 15 |
proper motion (J2000) | RA: -0,0311 arcsec/a | DEC: 0,108 arcsec/a | source: 25 | |
radial velocity | -5 km/s | source: 25 | ||
trigonometric parallax | 0,021 | ±0,002 arcsec | source: 25 | |
galactic coord. (B1950) | longitude: 285,98° | latitude: -14,41° | ||
GCI unit vector (J2000) | X: -0,258824 | Y: 0,230606 | Z: -0,937993 |
magnitude:
visual | 1,68 (observed) | source: 25 |
photovisual | 1,8 | source: 2 |
photographic | 1,8 | source: 2 |
spectral information:
spectral class | A0 | source: 96 | |
Morgan-Keenan | A2IV | source: 25 | |
B-magnitude | 1,68 ±0,05 | B-V-magnitude | 0 |
U-magnitude | 1,71 ±0,05 | U-B-magnitude | 0,03 |
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 | |
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 (J1950) | RA: 9h 12min 39,662sec | DEC: -69° 30' 39,63'' | ±0,009 arcsec |
position (J2000) | RA: 9h 13min 12,08sec | DEC: -69° 43' 1,96'' | |
proper motion J1950 (FK4) | RA: -0,0288 arcsec/a | DEC: 0,102 arcsec/a | ±0,002 arcsec/a in RA ±0,002 arcsec/a in DEC |
proper motion J2000 (FK5) | RA: -0,0297 arcsec/a | DEC: 0,108 arcsec/a | |
source of proper motion data | Determined by source catalog |
magnitude:
visual | 1,8 (accuracy: 2 decimals) |
source of visual magnitude data | Taken from the "Henry Draper Catalogue". |
spectral information:
spectral class | A0 |
source of spectral data | Taken from the Henry Draper Catalogue or no spectrum in source catalog. |
catalogues
source catalogue | FK4, catalogue number: 348 |
Durchmusterung | CP-69 1023 |
Boss General Catalogue | 12764 |
Henry Draper Catalogue | 80007 |