Astronomical Calendars

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Here are some useful calendars ( .pdf format) showing astronomical data for several sites in Oklahoma and elsewhere. The calendars were computed using a slightly modified version of the c program written by John Thorstensen of Dartmouth College.

University of Oklahoma campus observatory: 2015 2016 2017 2018

OkieTex site (near Kenton, OK): 2015 2016 2017 2018

Cheddar Ranch: 2013 2014 2015 2016

Kitt Peak National Observatory: 2015 2016 2017 2018

Mt. Graham International Observatory (VATT): 2013 2014 2015 2016

Cerro Tololo Interamerican Observatory: 2013 2014 2015 2016

Schmidt Observatory (Cape Cod): 2014 2015 2016

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Here is an example, showing the calendar for the 2014 OkieTex star party, along with explanations of the various columns:

                **2014 OkieTex***            ***** 2014 SEPTEMBER *****

Calendar for Okie-Tex, west longitude (h.m.s) =   6 51 48, latitude (d.m) =  36 53.9
Rise/set times  in Central time (  6 hr W), uncorrected for elevation, DAYLIGHT time used, * shows clock reset.
Moon info is for local midnight, even if moon is down.  Program: John Thorstensen, Dartmouth College.

  Date (eve/morn)        LMST    ---------- Sun: --------   LST twilight:   --------- Moon: ----------------  Twi-Twi
                         midn   set  twi.end twi.beg rise   eve    morn    rise    set  %illum    RA     Dec    hours

Sat Sep 20/Sun Sep 21   22 08   19 52  21 19   6 12  7 39   19 26   4 21    5 17  17 53     8   9 42.2   8 38     8.9 

Sun Sep 21/Mon Sep 22   22 12   19 50  21 17   6 13  7 40   19 29   4 26    6 12  18 26     4  10 27.5   5 12     8.9 
Mon Sep 22/Tue Sep 23   22 16   19 49  21 15   6 14  7 41   19 31   4 31    7 07  18 57     1  11 12.6   1 32     9.0 
Tue Sep 23/Wed Sep 24   22 20   19 47  21 14   6 15  7 41   19 33   4 36   .....  19 28     0  11 58.0 - 2 16     9.0 
Wed Sep 24/Thu Sep 25   22 24   19 46  21 12   6 16  7 42   19 36   4 41   .....  19 59     1  12 44.1 - 6 03     9.1 
Thu Sep 25/Fri Sep 26   22 28   19 44  21 10   6 16  7 43   19 38   4 45   .....  20 33     4  13 31.5 - 9 39     9.1 
Fri Sep 26/Sat Sep 27   22 32   19 43  21 09   6 17  7 44   19 40   4 50   .....  21 08     8  14 20.7 -12 55     9.1 
Sat Sep 27/Sun Sep 28   22 36   19 41  21 07   6 18  7 45   19 43   4 55   .....  21 48    15  15 11.8 -15 40     9.2 

Sun Sep 28/Mon Sep 29   22 40   19 40  21 06   6 19  7 45   19 45   5 00   .....  22 31    23  16 05.1 -17 43     9.2 

^^^^^^^(1)^^^^^^^^^^^   ^(2)^   ^(3)^  ^(4)^  ^(5)^ ^(6)^   ^(7)^  ^(8)^   ^(9)^  ^(10)^ ^(11)  ^(12)^  ^(13)^  ^(14)^

    (1) Events for one night (which of course covers parts of 2 calendar dates)       Calendars for several Oklahoma
    (2) Local Sideral Time (LST) at midnight                                          sites can be found at my web
    (3) Time of sunset                                                                site  (no www. needed, note
    (4) Time of end of evening (astronomical) twilight (Sun more than 18              its .net , not .com or .edu):
                degrees below horizon)
    (5) Time of start of morning twilight                                              hildaandtrojanasteroids.net
    (6) Time of sunrise
    (7) LST at time of (4)- end of evening twilight                                    Bill Romanishin:
    (8) LST at time of (5)- start of morning twilight                                  wromanishin at ou.edu
    (9) Time of Moon rise 
                         | ....  Moon rise or set during bright day (8AM to 4PM)
   (10) Time of Moon set
   (11) Percent of face of Moon illuminated (new = 0%, full= 100%)
   (12) Right Ascension of Moon at midnight
   (13) Declination of Moon at midnight
   (14) number of hours between twilights (time between (4) and (5))