Astronomy
Constellations - Triagulum - eta1TrA

 
Identification Data
Common Name
ConstellationTriagulum
Star Nameeta1TrA
Skymap Number16410067
Henry Draper (HD) Number149671
Harvard Revised (HR) Number6172
SAO Number253649
Durchmusterung (DM) NumberCP-68 2789
Washington Double Stars (WDS) Number

Positional Data
Position and Proper Motion (PPM) Number362256
Right Ascension (RA) J200016h 41m 23.108s
Declination (Dec) J2000-68° 17' 46.043"
Position Uncertainty0.0063s
Proper Motion in RA (J2000)/cos(Dec)-0.00254
Proper Motion in Dec (J2000)-0.011866
Radial Velocity-043.0km s-1
Trigonometric Parallax+0.00474s
Trigonometric Parallax Uncertainty0.00065s
GCI Unit Vector in X (J2000)-0.124380
GCI Unit Vector in Y (J2000)-0.348265
GCI Unit Vector in Z (J2000)-0.929108
Galactic Longitude321.71°
Galactic Latitude
-14.29°
Observational Data
Observed Visual Magnitude (V)5.89
Derived Visual Magnitude
Derived Visual Magnitude or Observed Visual Magnitude Uncertainty0.003
Observed B Magnitude5.81
Observed B-V Colour-0.081
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 Magnitude6.1
Observed Photographic Magnitude5.9
Morgan Keenan (MK) Spectral TypeB7IVe
One-Dimensional Spectral ClassB5
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 13:15:51 GMT+01:00 2001