tcaep.co.uk Navigation. See bottom for text alternatives
Previous Page...
 
Printer Version
Astronomy
Constellations - Lyra - 2mu Lyr (Alathfar)

 
Identification Data
Common NameAlathfar
ConstellationLyra
Star Name2mu Lyr
Skymap Number18240048
Henry Draper (HD) Number169702
Harvard Revised (HR) Number6903
SAO Number66943
Durchmusterung (DM) NumberBD+39 3410
Washington Double Stars (WDS) Number

Positional Data
Position and Proper Motion (PPM) Number81293
Right Ascension (RA) J200018h 24m 13.785s
Declination (Dec) J2000+39° 30' 26.059"
Position Uncertainty0.0063s
Proper Motion in RA (J2000)/cos(Dec)-0.00184
Proper Motion in Dec (J2000)-0.004666
Radial Velocity-024.0km s-1
Trigonometric Parallax+0.00739s
Trigonometric Parallax Uncertainty0.00052s
GCI Unit Vector in X (J2000)0.081418
GCI Unit Vector in Y (J2000)-0.767236
GCI Unit Vector in Z (J2000)0.636176
Galactic Longitude67.33°
Galactic Latitude
21.80°
Observational Data
Observed Visual Magnitude (V)5.12
Derived Visual Magnitude
Derived Visual Magnitude or Observed Visual Magnitude Uncertainty0.003
Observed B Magnitude5.16
Observed B-V Colour+0.038
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 Magnitude5.0
Observed Photographic Magnitude
Morgan Keenan (MK) Spectral TypeA3IVn
One-Dimensional Spectral ClassA2
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))

 
[ H O M E ] [ S C I E N C E ] [ M A T H S ] [ A S T R O N O M Y ]
Download | Shop | Contact | About
 
Page compiled: Sun Sep 02 13:15:45 GMT+01:00 2001
 
The Bottom Line
HomeScienceMathsAstronomyDownloadBookshopContactAbout Top of Page