Astronomy
Constellations - Cassiopeia - 21 Cas

 
Identification Data
Common Name
ConstellationCassiopeia
Star Name21 Cas
Skymap Number450088
Henry Draper (HD) Number4161
Harvard Revised (HR) Number192
SAO Number4216
Durchmusterung (DM) NumberBD+74 27
Washington Double Stars (WDS) Number
00457+7459
Positional Data
Position and Proper Motion (PPM) Number4492
Right Ascension (RA) J20000h 45m 39.077s
Declination (Dec) J2000+74° 59' 17.063"
Position Uncertainty0.0061s
Proper Motion in RA (J2000)/cos(Dec)-0.00384
Proper Motion in Dec (J2000)-0.021966
Radial Velocity+008.9km s-1
Trigonometric Parallax+0.01124s
Trigonometric Parallax Uncertainty0.00055s
GCI Unit Vector in X (J2000)0.253898
GCI Unit Vector in Y (J2000)0.051254
GCI Unit Vector in Z (J2000)0.965872
Galactic Longitude122.55°
Galactic Latitude
12.12°
Observational Data
Observed Visual Magnitude (V)5.65
Derived Visual Magnitude
Derived Visual Magnitude or Observed Visual Magnitude Uncertainty0.003
Observed B Magnitude5.72
Observed B-V Colour+0.067
Observed B Magnitude or (B-V) Magnitude Uncertainty0.004
Observed U Magnitude
Observed U-B Colour
Observed U Magnitude or (U-B) Magnitude Uncertainty
Observed Photovisual Magnitude5.6
Observed Photographic Magnitude
Morgan Keenan (MK) Spectral TypeA2IV
One-Dimensional Spectral ClassA2
Position Angle160
Year of Observation1962. 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 13:15:36 GMT+01:00 2001