Alfecca Meridiana
catalogues and names | Alfecca Meridiana, a CrA, HR 7254, HD 178253, SAO 210990, FK5: 718 |
constellation | Corona Australis |
data from The Bright Star Catalogue, 5th Revised Ed. (Preliminary Version) (Hoffleit+, 1991)
note (category: star names): | Alfecca Meridiana. |
position, motion, parallax:
position (J2000) | RA: 19h 9min 28,3sec | DEC: -37° 54' 16'' |
position (J1900) | RA: 19h 2min 40,2sec | DEC: -38° 3' 36'' |
proper motion (J2000) | RA: 0,084 arcsec/a | DEC: -0,098 arcsec/a |
radial velocity | -18 km/s | |
rotational velocity | 201 km/s (uncertain) (variable) | |
trigonometric parallax | 0,036 arcsec |
magnitude
visual magnitude | 4,11 (V on UBV Johnson system) |
spectral / color information
spectral class | A2V |
B-V-magnitude | 0,04 |
U-B-magnitude | 0,08 |
R-I-magnitude | 0 |
data from SKY2000 - Master Star Catalog (Myers+ 1997)
position, motion, parallax:
position (J2000) | RA: 19h 9min 28,336sec | DEC: -37° 54' 16,22'' | ±0,06 arcsec | source: 15 |
proper motion (J2000) | RA: 0,0071 arcsec/a | DEC: -0,098 arcsec/a | source: 25 | |
radial velocity | -18 km/s | source: 25 | ||
trigonometric parallax | 0,036 | ±0,004 arcsec | source: 25 | |
galactic coord. (B1950) | longitude: 359,55° | latitude: -19,59° | ||
GCI unit vector (J2000) | X: 0,235534 | Y: -0,753061 | Z: -0,614347 |
magnitude:
visual | 4,11 (observed) | source: 25 |
photovisual | 4,1 | source: 2 |
photographic | 4,2 | source: 2 |
spectral information:
spectral class | A2 | source: 96 | |
Morgan-Keenan | A2V | source: 25 | |
B-magnitude | 4,15 ±0,05 | B-V-magnitude | 0,04 |
U-magnitude | 4,23 ±0,05 | U-B-magnitude | 0,08 |
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: 19h 6min 4,345sec | DEC: -37° 59' 3,49'' | ±0,011 arcsec |
position (J2000) | RA: 19h 9min 28,334sec | DEC: -37° 54' 16,35'' | |
proper motion J1950 (FK4) | RA: 0,0071 arcsec/a | DEC: -0,099 arcsec/a | ±0,003 arcsec/a in RA ±0,002 arcsec/a in DEC |
proper motion J2000 (FK5) | RA: 0,0072 arcsec/a | DEC: -0,1 arcsec/a | |
source of proper motion data | Determined by source catalog |
magnitude:
visual | 4,1 (accuracy: 2 decimals) |
source of visual magnitude data | Taken from the "Henry Draper Catalogue". |
spectral information:
spectral class | A2 |
source of spectral data | Taken from the Henry Draper Catalogue or no spectrum in source catalog. |
catalogues
source catalogue | FK4, catalogue number: 718 |
Durchmusterung | CD-3813350 |
Boss General Catalogue | 26360 |
Henry Draper Catalogue | 178253 |