Astronomy
Constellations - Eridanus - 7 Eri

 
Identification Data
Common Name
ConstellationEridanus
Star Name7 Eri
Skymap Number3000109
Henry Draper (HD) Number18760
Harvard Revised (HR) Number904
SAO Number130242
Durchmusterung (DM) NumberSD-03 478
Washington Double Stars (WDS) Number

Positional Data
Position and Proper Motion (PPM) Number185291
Right Ascension (RA) J20003h 0m 50.879s
Declination (Dec) J2000-2° 52' 43.025"
Position Uncertainty0.0191s
Proper Motion in RA (J2000)/cos(Dec)+0.00050
Proper Motion in Dec (J2000)+0.009766
Radial Velocity+080.4km s-1
Trigonometric Parallax+0.00417s
Trigonometric Parallax Uncertainty0.00115s
GCI Unit Vector in X (J2000)0.703597
GCI Unit Vector in Y (J2000)0.708823
GCI Unit Vector in Z (J2000)-0.050220
Galactic Longitude180.47°
Galactic Latitude
-50.70°
Observational Data
Observed Visual Magnitude (V)6.12
Derived Visual Magnitude
Derived Visual Magnitude or Observed Visual Magnitude Uncertainty0.010
Observed B Magnitude7.84
Observed B-V Colour+1.721
Observed B Magnitude or (B-V) Magnitude Uncertainty0.018
Observed U Magnitude
Observed U-B Colour
Observed U Magnitude or (U-B) Magnitude Uncertainty
Observed Photovisual Magnitude5.9
Observed Photographic Magnitude7.7
Morgan Keenan (MK) Spectral TypeM1III
One-Dimensional Spectral ClassM0
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 13:15:40 GMT+01:00 2001