*** 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 11 ---> Wed, 2002 Jun 12
Local midnight = 2002 Jun 11, 23 hr UT, or JD 2452437.458
Local Mean Sidereal Time at midnight =  15 08 55.2

Sunset ( 2326 m horizon):   21 18 GDT; Sunrise:    7 05 GDT
Evening twilight:   22 44 GDT;  LMST at evening twilight:   13 52
Morning twilight:    5 39 GDT;  LMST at morning twilight:   20 48
12-degr twilight:  22 09 GDT -->   6 13 GDT; night center:    2 11 GDT

Moonset :   22 04 GDT   
Moon at civil midnight: illuminated fraction 0.010
1.0 days since new moon, RA and dec:   6 08 57,  24 06.2

The sun is down for  9.8 hr;  6.9 hr from eve->morn 18 deg twilight.
Dark all night (moon down from evening to morning twilight).