Astronomy
Constellations - Ursa Major - 18 UMa

 
Identification Data
Common Name
ConstellationUrsa Major
Star Name18 UMa
Skymap Number9160035
Henry Draper (HD) Number79439
Harvard Revised (HR) Number3662
SAO Number27191
Durchmusterung (DM) NumberBD+54 1285
Washington Double Stars (WDS) Number

Positional Data
Position and Proper Motion (PPM) Number32078
Right Ascension (RA) J20009h 16m 11.327s
Declination (Dec) J2000+54° 1' 18.687"
Position Uncertainty0.0098s
Proper Motion in RA (J2000)/cos(Dec)+0.00558
Proper Motion in Dec (J2000)+0.059866
Radial Velocity-018.7km s-1
Trigonometric Parallax+0.02755s
Trigonometric Parallax Uncertainty0.00080s
GCI Unit Vector in X (J2000)-0.443692
GCI Unit Vector in Y (J2000)0.385054
GCI Unit Vector in Z (J2000)0.809241
Galactic Longitude163.09°
Galactic Latitude
42.66°
Observational Data
Observed Visual Magnitude (V)4.82
Derived Visual Magnitude
Derived Visual Magnitude or Observed Visual Magnitude Uncertainty0.003
Observed B Magnitude5.02
Observed B-V Colour+0.204
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 Magnitude4.9
Observed Photographic Magnitude
Morgan Keenan (MK) Spectral TypeA5V
One-Dimensional Spectral ClassA5
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 13:15:52 GMT+01:00 2001