OBSERVING PERIODS- 2028
      (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)
     ---------------------------------------------
     2027 Dec 21-Jan 05    DARK      NEW    Dec 27
     2028 Jan 06-Jan 18    BRIGHT    FULL   Jan 12
     2028 Jan 19-Feb 03    DARK      NEW    Jan 26
     2028 Feb 04-Feb 17    BRIGHT    FULL   Feb 10
     2028 Feb 18-Mar 04    DARK      NEW    Feb 25
     2028 Mar 05-Mar 17    BRIGHT    FULL   Mar 11
     2028 Mar 18-Apr 02    DARK      NEW    Mar 26
     2028 Apr 03-Apr 16    BRIGHT    FULL   Apr 09
     2028 Apr 17-May 02    DARK      NEW    Apr 24
     2028 May 03-May 16    BRIGHT    FULL   May 08
     2028 May 17-May 31    DARK      NEW    May 24
     2028 Jun 01-Jun 15    BRIGHT    FULL   Jun 07
     2028 Jun 16-Jun 29    DARK      NEW    Jun 22
     2028 Jun 30-Jul 14    BRIGHT    FULL   Jul 06
     2028 Jul 15-Jul 28    DARK      NEW    Jul 22
     2028 Jul 29-Aug 13    BRIGHT    FULL   Aug 05
     2028 Aug 14-Aug 27    DARK      NEW    Aug 20
     2028 Aug 28-Sep 12    BRIGHT    FULL   Sep 03
     2028 Sep 13-Sep 25    DARK      NEW    Sep 18
     2028 Sep 26-Oct 11    BRIGHT    FULL   Oct 03
     2028 Oct 12-Oct 25    DARK      NEW    Oct 18
     2028 Oct 26-Nov 09    BRIGHT    FULL   Nov 02
     2028 Nov 10-Nov 24    DARK      NEW    Nov 16
     2028 Nov 25-Dec 09    BRIGHT    FULL   Dec 02
     2028 Dec 10-Dec 23    DARK      NEW    Dec 16
     2028 Dec 24-Jan 07    BRIGHT    FULL   Dec 31
     ---------------------------------------------