*** Almanac for the currently specified date ***:
Almanac for ESO, Cerro La Silla:
long.   4 42 55 (h.m.s) W, lat. -29 15.4 (d.m), elev.  2347 m
Chilean Daylight Savings Time used before 2 AM 
2000 Mar 12 and after 2 AM 2000 Oct 8; standard zone =   4 hrs W

For the night of: Thu, 2000 Aug 17 ---> Fri, 2000 Aug 18
Local midnight = 2000 Aug 18,  4 hr UT, or JD 2451774.667
Local Mean Sidereal Time at midnight =  21 04 24.4

Sunset ( 2347 m horizon):   18 28 CST; Sunrise:    7 05 CST
Evening twilight:   19 41 CST;  LMST at evening twilight:   16 45
Morning twilight:    5 52 CST;  LMST at morning twilight:    2 58
12-degr twilight:  19 13 CST -->   6 20 CST; night center:    0 47 CST

Moonrise:   20 35 CST   
Moon at civil midnight: illuminated fraction 0.912
2.9 days after full moon, RA and dec:   0 06 31,  -4 16.5

The sun is down for 12.6 hr; 10.2 hr from eve->morn 18 deg twilight.
 0.9 dark hours after end of twilight and before moonrise.