*** 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: Sat, 2000 Aug 12 ---> Sun, 2000 Aug 13
Local midnight = 2000 Aug 13,  4 hr UT, or JD 2451769.667
Local Mean Sidereal Time at midnight =  20 44 41.6

Sunset ( 2347 m horizon):   18 25 CST; Sunrise:    7 10 CST
Evening twilight:   19 39 CST;  LMST at evening twilight:   16 23
Morning twilight:    5 57 CST;  LMST at morning twilight:    2 42
12-degr twilight:  19 11 CST -->   6 24 CST; night center:    0 48 CST

Moonrise:   16 03 CST   Moonset :    6 25 CST   
Moon at civil midnight: illuminated fraction 0.961
2.1 days until full moon, RA and dec:  20 00 43, -20 42.8

The sun is down for 12.7 hr; 10.3 hr from eve->morn 18 deg twilight.
Bright all night (moon up from evening to morning twilight).