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Astronomy
Constellations - Aries - 21 Ari

 
Identification Data
Common Name
ConstellationAries
Star Name21 Ari
Skymap Number2150117
Henry Draper (HD) Number13872
Harvard Revised (HR) Number657
SAO Number75238
Durchmusterung (DM) NumberBD+24 329
Washington Double Stars (WDS) Number
02157+2503
Positional Data
Position and Proper Motion (PPM) Number91494
Right Ascension (RA) J20002h 15m 42.773s
Declination (Dec) J2000+25° 2' 34.884"
Position Uncertainty0.0112s
Proper Motion in RA (J2000)/cos(Dec)-0.00653
Proper Motion in Dec (J2000)-0.087267
Radial Velocity-044.3km s-1
Trigonometric Parallax+0.02077s
Trigonometric Parallax Uncertainty0.00089s
GCI Unit Vector in X (J2000)0.751734
GCI Unit Vector in Y (J2000)0.505682
GCI Unit Vector in Z (J2000)0.423299
Galactic Longitude146.08°
Galactic Latitude
-34.01°
Observational Data
Observed Visual Magnitude (V)5.58
Derived Visual Magnitude
Derived Visual Magnitude or Observed Visual Magnitude Uncertainty0.003
Observed B Magnitude6.09
Observed B-V Colour+0.510
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 TypeF6V
One-Dimensional Spectral ClassF5
Position Angle
Year of Observation1993. 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))

 
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Page compiled: Sun Sep 02 13:15:33 GMT+01:00 2001
 
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