KECK OBSERVATORY CALENDAR FOR 2020 -ASTRONOMICAL (computed for altitude 4160.0 m) ASTRONOMICAL(18 deg) TWILIGHT/DAWN MOON(midnight) DATE(HST) SUN TWILIGHT ENDS MOON MOON DAWN BEGINS SUN SIDEREAL TIMES NIGHT (18 deg) Zenith 2020 SET RISE SET RISE TWI MID DAWN LENGTH DARK___ RA DEC Dist 12 18 18 12 18 18 h h % h m d m deg TUE DEC 01 17 53 18 33 19 00 18 50 05 23 05 50 06 30 23 24 04 25 09 49 10.4 0.0 0 0616 2440 26 WED DEC 02 17 53 18 33 19 00 19 42 05 24 05 51 06 31 23 28 04 29 09 54 10.4 0.7 6 0712 2448 38 THU DEC 03 17 53 18 33 19 00 20 37 05 24 05 51 06 32 23 32 04 33 09 58 10.4 1.6 15 0808 2337 50 FRI DEC 04 17 53 18 33 19 00 21 35 05 25 05 52 06 32 23 36 04 37 10 03 10.4 2.6 24 0904 2110 62 SAT DEC 05 17 53 18 34 19 01 22 33 05 25 05 52 06 33 23 41 04 41 10 07 10.4 3.5 33 0958 1735 74 SUN DEC 06 17 53 18 34 19 01 23 31 05 26 05 53 06 33 23 45 04 45 10 12 10.4 4.5 43 1049 1259 87 MON DEC 07 17 54 18 34 19 01 00 29 05 27 05 54 06 34 23 49 04 49 10 16 10.4 5.5 52 1142 0746 >90 TUE DEC 08 17 54 18 34 19 01 01 28 05 27 05 54 06 35 23 53 04 53 10 20 10.4 6.5 61 1233 0200 >90 WED DEC 09 17 54 18 35 19 02 02 27 14 13 05 28 05 55 06 35 23 58 04 56 10 25 10.4 7.4 71 1325-0358 >90 THU DEC 10 17 55 18 35 19 02 03 28 14 54 05 28 05 55 06 36 00 02 05 00 10 29 10.4 8.4 80 1418-0950 >90 FRI DEC 11 17 55 18 35 19 03 04 32 15 39 05 29 05 56 06 36 00 07 05 04 10 34 10.4 9.5 90 1514-1511 >90 SAT DEC 12 17 55 18 36 19 03 05 37 16 27 05 29 05 56 06 37 00 10 05 08 10 38 10.4 10.4 100 1612-1940 >90 SUN DEC 13 17 56 18 36 19 03 06 44 17 21 05 30 05 57 06 38 00 14 05 12 10 43 10.5 10.5 100 1713-2253 >90 MON DEC 14 17 56 18 37 19 04 18 19 05 30 05 58 06 38 00 19 05 16 10 47 10.4 10.4 100 1816-2435 >90 TUE DEC 15 17 56 18 37 19 04 19 20 05 31 05 58 06 39 00 23 05 20 10 52 10.4 10.2 97 1918-2440 >90 WED DEC 16 17 57 18 37 19 05 20 22 05 32 05 59 06 39 00 28 05 24 10 57 10.4 9.2 87 2018-2313 >90 THU DEC 17 17 57 18 38 19 05 21 22 05 32 05 59 06 40 00 32 05 28 11 01 10.4 8.2 78 2114-2029 >90 FRI DEC 18 17 58 18 38 19 05 22 19 05 33 06 00 06 40 00 36 05 32 11 06 10.5 7.2 69 2207-1648 >90 SAT DEC 19 17 58 18 39 19 06 23 13 05 33 06 00 06 41 00 41 05 36 11 10 10.4 6.3 60 2255-1227 >90 SUN DEC 20 17 59 18 39 19 06 00 04 05 34 06 01 06 41 00 45 05 40 11 15 10.5 5.5 52 2347-0713 >90 MON DEC 21 17 59 18 40 19 07 00 53 05 34 06 01 06 42 00 50 05 44 11 19 10.4 4.7 44 0026-0241 81 TUE DEC 22 18 00 18 40 19 07 01 41 05 35 06 02 06 42 00 54 05 48 11 24 10.5 3.9 37 0109 0218 70 WED DEC 23 18 00 18 41 19 08 02 29 05 35 06 02 06 43 00 59 05 52 11 28 10.5 3.1 29 0153 0713 59 THU DEC 24 18 01 18 41 19 08 14 02 03 18 05 36 06 03 06 43 01 03 05 56 11 33 10.5 2.3 21 0237 1154 48 FRI DEC 25 18 01 18 42 19 09 14 38 04 09 05 36 06 03 06 44 01 08 06 00 11 36 10.5 1.4 13 0324 1609 37 SAT DEC 26 18 02 18 42 19 10 15 16 05 02 05 36 06 04 06 44 01 13 06 03 11 40 10.4 0.6 5 0413 1949 26 SUN DEC 27 18 02 18 43 19 10 15 58 05 56 05 37 06 04 06 44 01 17 06 07 11 45 10.5 0.0 0 0504 2238 15 MON DEC 28 18 03 18 44 19 11 16 44 06 51 05 37 06 04 06 45 01 22 06 11 11 49 10.4 0.0 0 0559 2425 05 TUE DEC 29 18 04 18 44 19 11 17 36 05 38 06 05 06 45 01 26 06 15 11 54 10.5 0.0 0 0655 2457 11 WED DEC 30 18 04 18 45 19 12 18 31 05 38 06 05 06 46 01 30 06 19 11 58 10.4 0.0 0 0752 2408 22 THU DEC 31 18 05 18 45 19 12 19 29 05 38 06 06 06 46 01 34 06 23 12 02 10.4 0.3 2 0849 2158 34 ONE LINE REFERS TO EVENING DATE LAST QUARTER Dec 08 00:36 UT AND FOLLOWING MORNING. NEW MOON Dec 14 16:17 UT All dates and times are zone HST FIRST QUARTER Dec 21 23:41 UT in upper table (except sid time). FULL MOON Dec 30 03:28 UT