OBSERVING PERIODS- 2031
      (UT dates. Lick PST=UT-8h   Keck HST=UT-10h)
      --------------------------------------------
            DURATION       RUN           MOON
           FQ+1 to LQ      bright     PHASE  DATE
           LQ+1 to FQ      dark              (UT)
     ---------------------------------------------
     2031 Jan 01-Jan 16    BRIGHT    FULL   Jan 08
     2031 Jan 17-Jan 30    DARK      NEW    Jan 23
     2031 Jan 31-Feb 14    BRIGHT    FULL   Feb 07
     2031 Feb 15-Mar 01    DARK      NEW    Feb 21
     2031 Mar 02-Mar 16    BRIGHT    FULL   Mar 09
     2031 Mar 17-Mar 31    DARK      NEW    Mar 23
     2031 Apr 01-Apr 14    BRIGHT    FULL   Apr 07
     2031 Apr 15-Apr 29    DARK      NEW    Apr 21
     2031 Apr 30-May 13    BRIGHT    FULL   May 07
     2031 May 14-May 29    DARK      NEW    May 21
     2031 May 30-Jun 12    BRIGHT    FULL   Jun 05
     2031 Jun 13-Jun 28    DARK      NEW    Jun 19
     2031 Jun 29-Jul 11    BRIGHT    FULL   Jul 04
     2031 Jul 12-Jul 27    DARK      NEW    Jul 19
     2031 Jul 28-Aug 10    BRIGHT    FULL   Aug 03
     2031 Aug 11-Aug 25    DARK      NEW    Aug 18
     2031 Aug 26-Sep 08    BRIGHT    FULL   Sep 01
     2031 Sep 09-Sep 24    DARK      NEW    Sep 16
     2031 Sep 25-Oct 08    BRIGHT    FULL   Sep 30
     2031 Oct 09-Oct 23    DARK      NEW    Oct 16
     2031 Oct 24-Nov 07    BRIGHT    FULL   Oct 30
     2031 Nov 08-Nov 21    DARK      NEW    Nov 14
     2031 Nov 22-Dec 07    BRIGHT    FULL   Nov 28
     2031 Dec 08-Dec 21    DARK      NEW    Dec 14
     2031 Dec 22-Jan 05    BRIGHT    FULL   Dec 28
     ---------------------------------------------