*** Almanac for the currently specified date ***:
Almanac for Roque de los Muchachos:
long.   1 11 31 (h.m.s) W, lat.  28 45.5 (d.m), elev.  2326 m
pseudo-Greenwich Daylight Savings Time assumed from 2 AM on
2002 Mar 31 to 2 AM on 2002 Sep 29; standard zone =   0 hrs W

For the night of: Tue, 2002 Jun 18 ---> Wed, 2002 Jun 19
Local midnight = 2002 Jun 18, 23 hr UT, or JD 2452444.458
Local Mean Sidereal Time at midnight =  15 36 31.0

Sunset ( 2326 m horizon):   21 20 GDT; Sunrise:    7 05 GDT
Evening twilight:   22 46 GDT;  LMST at evening twilight:   14 23
Morning twilight:    5 39 GDT;  LMST at morning twilight:   21 16
12-degr twilight:  22 12 GDT -->   6 14 GDT; night center:    2 13 GDT

Moonset :    3 20 GDT   
Moon at civil midnight: illuminated fraction 0.605
0.9 days since first quarter, RA and dec:  12 42 01,   0 03.8

The sun is down for  9.8 hr;  6.9 hr from eve->morn 18 deg twilight.
 2.3 dark hours after moonset and before beginning of twilight.