*** 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: Wed, 2000 Aug 16 ---> Thu, 2000 Aug 17
Local midnight = 2000 Aug 17,  4 hr UT, or JD 2451773.667
Local Mean Sidereal Time at midnight =  21 00 27.8

Sunset ( 2347 m horizon):   18 28 CST; Sunrise:    7 06 CST
Evening twilight:   19 40 CST;  LMST at evening twilight:   16 40
Morning twilight:    5 53 CST;  LMST at morning twilight:    2 55
12-degr twilight:  19 13 CST -->   6 21 CST; night center:    0 47 CST

Moonrise:   19 40 CST   
Moon at civil midnight: illuminated fraction 0.961
1.9 days after full moon, RA and dec:  23 18 54,  -8 45.3

The sun is down for 12.6 hr; 10.2 hr from eve->morn 18 deg twilight.
Bright all night (moon up from evening to morning twilight).