Astronomy
Constellations - Cancer - 17bet Cnc (Altarf)

 
Identification Data
Common NameAltarf
ConstellationCancer
Star Name17bet Cnc
Skymap Number8160123
Henry Draper (HD) Number69267
Harvard Revised (HR) Number3249
SAO Number116569
Durchmusterung (DM) NumberBD+09 1917
Washington Double Stars (WDS) Number
08165+0911
Positional Data
Position and Proper Motion (PPM) Number154193
Right Ascension (RA) J20008h 16m 30.920s
Declination (Dec) J2000+9° 11' 7.961"
Position Uncertainty0.0146s
Proper Motion in RA (J2000)/cos(Dec)-0.00316
Proper Motion in Dec (J2000)-0.048766
Radial Velocity+022.2km s-1
Trigonometric Parallax+0.01123s
Trigonometric Parallax Uncertainty0.00097s
GCI Unit Vector in X (J2000)-0.553861
GCI Unit Vector in Y (J2000)0.817163
GCI Unit Vector in Z (J2000)0.159632
Galactic Longitude214.26°
Galactic Latitude
23.05°
Observational Data
Observed Visual Magnitude (V)3.52
Derived Visual Magnitude
Derived Visual Magnitude or Observed Visual Magnitude Uncertainty0.003
Observed B Magnitude5.00
Observed B-V Colour+1.483
Observed B Magnitude or (B-V) Magnitude Uncertainty0.004
Observed U Magnitude
Observed U-B Colour
Observed U Magnitude or (U-B) Magnitude Uncertainty
Observed Photovisual Magnitude3.8
Observed Photographic Magnitude
Morgan Keenan (MK) Spectral TypeK4IIIBa0.5
One-Dimensional Spectral ClassK2
Position Angle294
Year of Observation1910. 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 13:15:37 GMT+01:00 2001