NGC 2539
Fundamental
Coordinates J2000
Coordinates B1950
Positions
Absolute p.m.
Photometry
UBV
Geneva 7-col
Geneva
DDO data
Washington
UBV CCD
VIc CCD
Spectroscopy
MK types
HD types
Mean Vr
Radial Velocity
Orbital elements
Miscellanous
Periods
Membership