Astronomy
Constellations - Boötes - 23the Boo (Asellus Primus)

 
Identification Data
Common NameAsellus Primus
ConstellationBoötes
Star Name23the Boo
Skymap Number14250030
Henry Draper (HD) Number126660
Harvard Revised (HR) Number5404
SAO Number29137
Durchmusterung (DM) NumberBD+52 1804
Washington Double Stars (WDS) Number
14252+5151
Positional Data
Position and Proper Motion (PPM) Number34508
Right Ascension (RA) J200014h 25m 11.796s
Declination (Dec) J2000+51° 51' 2.677"
Position Uncertainty0.0065s
Proper Motion in RA (J2000)/cos(Dec)-0.02548
Proper Motion in Dec (J2000)-0.399166
Radial Velocity-010.9km s-1
Trigonometric Parallax+0.06863s
Trigonometric Parallax Uncertainty0.00056s
GCI Unit Vector in X (J2000)-0.497837
GCI Unit Vector in Y (J2000)-0.365686
GCI Unit Vector in Z (J2000)0.786404
Galactic Longitude93.83°
Galactic Latitude
59.65°
Observational Data
Observed Visual Magnitude (V)4.05
Derived Visual Magnitude
Derived Visual Magnitude or Observed Visual Magnitude Uncertainty0.002
Observed B Magnitude4.56
Observed B-V Colour+0.507
Observed B Magnitude or (B-V) Magnitude Uncertainty0.002
Observed U Magnitude
Observed U-B Colour
Observed U Magnitude or (U-B) Magnitude Uncertainty
Observed Photovisual Magnitude4.1
Observed Photographic Magnitude
Morgan Keenan (MK) Spectral TypeF7V
One-Dimensional Spectral ClassF8
Position Angle182
Year of Observation1971. 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 13:15:34 GMT+01:00 2001