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Astronomy
Constellations - Ursa Major - 69del UMa (Megrez)

 
Identification Data
Common NameMegrez
ConstellationUrsa Major
Star Name69del UMa
Skymap Number12150059
Henry Draper (HD) Number106591
Harvard Revised (HR) Number4660
SAO Number28315
Durchmusterung (DM) NumberBD+57 1363
Washington Double Stars (WDS) Number
12154+5702
Positional Data
Position and Proper Motion (PPM) Number33469
Right Ascension (RA) J200012h 15m 25.560s
Declination (Dec) J2000+57° 1' 57.421"
Position Uncertainty0.0068s
Proper Motion in RA (J2000)/cos(Dec)+0.01269
Proper Motion in Dec (J2000)+0.007866
Radial Velocity-013.4km s-1
Trigonometric Parallax+0.04005s
Trigonometric Parallax Uncertainty0.00060s
GCI Unit Vector in X (J2000)-0.542929
GCI Unit Vector in Y (J2000)-0.036599
GCI Unit Vector in Z (J2000)0.838980
Galactic Longitude132.56°
Galactic Latitude
59.42°
Observational Data
Observed Visual Magnitude (V)3.30
Derived Visual Magnitude
Derived Visual Magnitude or Observed Visual Magnitude Uncertainty0.002
Observed B Magnitude3.39
Observed B-V Colour+0.092
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 Magnitude3.4
Observed Photographic Magnitude3.3
Morgan Keenan (MK) Spectral TypeA3V
One-Dimensional Spectral ClassA2
Position Angle73
Year of Observation1923. 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 13:15:52 GMT+01:00 2001
 
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