Astronomy
Constellations - Sagitta - 18 Sge

 
Identification Data
Common Name
ConstellationSagitta
Star Name18 Sge
Skymap Number20160079
Henry Draper (HD) Number192836
Harvard Revised (HR) Number7746
SAO Number88433
Durchmusterung (DM) NumberBD+21 4130
Washington Double Stars (WDS) Number

Positional Data
Position and Proper Motion (PPM) Number110778
Right Ascension (RA) J200020h 16m 19.787s
Declination (Dec) J2000+21° 35' 55.321"
Position Uncertainty0.0082s
Proper Motion in RA (J2000)/cos(Dec)+0.00058
Proper Motion in Dec (J2000)-0.025766
Radial Velocity-004.1km s-1
Trigonometric Parallax+0.01095s
Trigonometric Parallax Uncertainty0.00075s
GCI Unit Vector in X (J2000)0.521038
GCI Unit Vector in Y (J2000)-0.770078
GCI Unit Vector in Z (J2000)0.368103
Galactic Longitude61.97°
Galactic Latitude
-7.57°
Observational Data
Observed Visual Magnitude (V)6.12
Derived Visual Magnitude
Derived Visual Magnitude or Observed Visual Magnitude Uncertainty0.004
Observed B Magnitude7.16
Observed B-V Colour+1.043
Observed B Magnitude or (B-V) Magnitude Uncertainty0.006
Observed U Magnitude
Observed U-B Colour
Observed U Magnitude or (U-B) Magnitude Uncertainty
Observed Photovisual Magnitude6.2
Observed Photographic Magnitude7.4
Morgan Keenan (MK) Spectral TypeK1III
One-Dimensional Spectral ClassK0
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 13:15:50 GMT+01:00 2001