Astronomy
Constellations - Ursa Minor - 21eta UMi

 
Identification Data
Common Name
ConstellationUrsa Minor
Star Name21eta UMi
Skymap Number16170073
Henry Draper (HD) Number148048
Harvard Revised (HR) Number6116
SAO Number8470
Durchmusterung (DM) NumberBD+76 596
Washington Double Stars (WDS) Number
16175+7545
Positional Data
Position and Proper Motion (PPM) Number9157
Right Ascension (RA) J200016h 17m 30.287s
Declination (Dec) J2000+75° 45' 19.190"
Position Uncertainty0.0063s
Proper Motion in RA (J2000)/cos(Dec)-0.02437
Proper Motion in Dec (J2000)+0.257866
Radial Velocity-009.5km s-1
Trigonometric Parallax+0.03352s
Trigonometric Parallax Uncertainty0.00047s
GCI Unit Vector in X (J2000)-0.106413
GCI Unit Vector in Y (J2000)-0.221864
GCI Unit Vector in Z (J2000)0.969254
Galactic Longitude109.27°
Galactic Latitude
35.33°
Observational Data
Observed Visual Magnitude (V)4.96
Derived Visual Magnitude
Derived Visual Magnitude or Observed Visual Magnitude Uncertainty0.002
Observed B Magnitude5.34
Observed B-V Colour+0.376
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 Magnitude5.0
Observed Photographic Magnitude
Morgan Keenan (MK) Spectral TypeF5V
One-Dimensional Spectral ClassF0
Position Angle125
Year of Observation1966. 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 13:15:52 GMT+01:00 2001