Astronomy
Constellations - Corona Australis - alp CrA (Alfecca Meridiana)

 
Identification Data
Common NameAlfecca Meridiana
ConstellationCorona Australis
Star Namealp CrA
Skymap Number19090109
Henry Draper (HD) Number178253
Harvard Revised (HR) Number7254
SAO Number210990
Durchmusterung (DM) NumberCD-3813350
Washington Double Stars (WDS) Number

Positional Data
Position and Proper Motion (PPM) Number298624
Right Ascension (RA) J200019h 9m 28.341s
Declination (Dec) J2000-37° 54' 16.108"
Position Uncertainty0.0105s
Proper Motion in RA (J2000)/cos(Dec)+0.00724
Proper Motion in Dec (J2000)-0.096766
Radial Velocity-018.4km s-1
Trigonometric Parallax+0.02515s
Trigonometric Parallax Uncertainty0.00083s
GCI Unit Vector in X (J2000)0.235535
GCI Unit Vector in Y (J2000)-0.753061
GCI Unit Vector in Z (J2000)-0.614347
Galactic Longitude359.55°
Galactic Latitude
-19.59°
Observational Data
Observed Visual Magnitude (V)4.10
Derived Visual Magnitude
Derived Visual Magnitude or Observed Visual Magnitude Uncertainty0.002
Observed B Magnitude4.16
Observed B-V Colour+0.062
Observed B Magnitude or (B-V) Magnitude Uncertainty0.003
Observed U Magnitude
Observed U-B Colour
Observed U Magnitude or (U-B) Magnitude Uncertainty
Observed Photovisual Magnitude4.1
Observed Photographic Magnitude4.2
Morgan Keenan (MK) Spectral TypeA2V
One-Dimensional Spectral ClassA2
Position Angle
Year of Observation AD

Data Source
SKY2000 - Master Star Catalog - Star Catalog Database, Version 2
    Sande C.B., Warren Jr. W.H., Tracewell D.A., Home A.T., Miller A.C.
    (Goddard Space Flight Center, Flight Dynamics Division (1998))

 
Page compiled: Sun Sep 02 13:15:38 GMT+01:00 2001