OBSERVING PERIODS- 2027
      (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)
     ---------------------------------------------
     2026 Dec 31-Jan 15    DARK      NEW    Jan 07
     2027 Jan 16-Jan 29    BRIGHT    FULL   Jan 22
     2027 Jan 30-Feb 14    DARK      NEW    Feb 06
     2027 Feb 15-Feb 28    BRIGHT    FULL   Feb 20
     2027 Mar 01-Mar 15    DARK      NEW    Mar 08
     2027 Mar 16-Mar 30    BRIGHT    FULL   Mar 22
     2027 Mar 31-Apr 13    DARK      NEW    Apr 06
     2027 Apr 14-Apr 28    BRIGHT    FULL   Apr 20
     2027 Apr 29-May 13    DARK      NEW    May 06
     2027 May 14-May 28    BRIGHT    FULL   May 20
     2027 May 29-Jun 11    DARK      NEW    Jun 04
     2027 Jun 12-Jun 27    BRIGHT    FULL   Jun 19
     2027 Jun 28-Jul 10    DARK      NEW    Jul 04
     2027 Jul 11-Jul 26    BRIGHT    FULL   Jul 18
     2027 Jul 27-Aug 09    DARK      NEW    Aug 02
     2027 Aug 10-Aug 25    BRIGHT    FULL   Aug 17
     2027 Aug 26-Sep 07    DARK      NEW    Aug 31
     2027 Sep 08-Sep 23    BRIGHT    FULL   Sep 15
     2027 Sep 24-Oct 07    DARK      NEW    Sep 30
     2027 Oct 08-Oct 22    BRIGHT    FULL   Oct 15
     2027 Oct 23-Nov 06    DARK      NEW    Oct 29
     2027 Nov 07-Nov 21    BRIGHT    FULL   Nov 14
     2027 Nov 22-Dec 06    DARK      NEW    Nov 28
     2027 Dec 07-Dec 20    BRIGHT    FULL   Dec 13
     2027 Dec 21-Jan 05    DARK      NEW    Dec 27
     ---------------------------------------------