Astronomy
Constellations - Ophiuchus - 7chi Oph

 
Identification Data
Common Name
ConstellationOphiuchus
Star Name7chi Oph
Skymap Number16270002
Henry Draper (HD) Number148184
Harvard Revised (HR) Number6118
SAO Number159918
Durchmusterung (DM) NumberSD-18 4282
Washington Double Stars (WDS) Number

Positional Data
Position and Proper Motion (PPM) Number231703
Right Ascension (RA) J200016h 27m 1.434s
Declination (Dec) J2000-18° 27' 22.504"
Position Uncertainty0.0099s
Proper Motion in RA (J2000)/cos(Dec)-0.00039
Proper Motion in Dec (J2000)-0.022266
Radial Velocity-019.4km s-1
Trigonometric Parallax+0.00667s
Trigonometric Parallax Uncertainty0.00074s
GCI Unit Vector in X (J2000)-0.374350
GCI Unit Vector in Y (J2000)-0.871573
GCI Unit Vector in Z (J2000)-0.316580
Galactic Longitude357.94°
Galactic Latitude
20.68°
Observational Data
Observed Visual Magnitude (V)4.26
Derived Visual Magnitude
Derived Visual Magnitude or Observed Visual Magnitude Uncertainty0.006
Observed B Magnitude4.47
Observed B-V Colour+0.213
Observed B Magnitude or (B-V) Magnitude Uncertainty0.010
Observed U Magnitude
Observed U-B Colour
Observed U Magnitude or (U-B) Magnitude Uncertainty
Observed Photovisual Magnitude4.1
Observed Photographic Magnitude4.7
Morgan Keenan (MK) Spectral TypeB2IV:pe
One-Dimensional Spectral ClassB3
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 13:15:45 GMT+01:00 2001