Version 4.2.0

• Elwood himself has contributed a new option that lets you switch XEphem from giving your telescope J2000 coordinates to giving it equinox-of-date coordinates.
• Sky View: the mouse wheel now zooms the view in and out.
• Sky View: DSS image download has been fixed by upgrading to HTTPS, and the window should no longer awkwardly resize once the image arrives.
• Data » Download: added the URL of the Celestrak “visual.txt” file.
• Data » Download: replaced “ftp.lowell.edu” with modern HTTPS.
• Data » Field Stars: François Meyer added support for the ucac5 catalog.
• The precession formula has been updated to the one from the 2000 Astronomical Almanac.
• A couple of compilation problems on modern Mac machines have been fixed.
• XEphem now uses more modern SSL setup routines if the code detects it’s being compiled against OpenSSL ≥1.1.
• Closing the INDI window with your window manager’s “Close” button no longer crashes XEphem.
• All references to “celestrak.com” have been changed to their new hostname “celestrak.org”.
• A few other small fixes.