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Exploiting Moon Phases to obtain high contrast lunar images

This article describes an attempt to obtain a high contrast image of the moon by exploiting lunar phases. One of the most obvious features of an image of the moon in any partial phase is that the contrast is greatest at the terminator, the region of twilight between the sunlit portion of the moon's surface and the dark portion. This terminator region thus yields the greatest degree of detail of the nature of the lunar surface. During a lunar month, the terminator scans across the whole of the moon's visible surface, successively highlighting the detail in a series of crescent-shaped terminator regions. Photographing the moon nightly throughout an entire lunar month, 29 -30 images can be produced which can then be combined to generate the desired high contrast image of the full moon showing detail which would not otherwise be visible in a normal full-moon photograph.

Carrying out this project in southern Scotland where a large proportion of the nights are overcast, means that it will be expected that many lunar cycles will be needed to accumulate the required 29 images. A further complication arises from the location's latitude. In the Summer, the nights are very short and to be useful, the moon needs to be at a useful elevation during the hours of darkness. This puts a further constraint on the number of useful nights for observation and photography.

Possible nights for Lunar Photography in 2018 from Southern Scotland

For convenience the phases of the moon are identified by integers for each day of the lunar month, starting with the Full Moon (=1). The following table shows the possible days upon which certain phases will be observable weather permitting.

DATETIMEELEVATIONPHASE
05/2423:592725
05/2523:592726
05/2623:592427
05/2723:592128
05/2823:591729
05/2923:591230
06/0704:001310
06/0804:00118
06/1723:001320
06/1823:001721
06/1923:002122
06/2023:002223
06/2123:002324
06/2223:002325
06/2323:002126
06/2423:001927
06/2523:591628
07/0804:001611
07/0904:00812
07/1004:001113
07/1104:00614
07/1522:00618
07/1623:00519
07/1723:001120
07/2923:5913
08/01 01:00145
08/0302:00217
08/0502:00159
08/0704:002211
08/2423:591328
08/2523:591629
08/2623:59191
08/2723:59202
08/2823:59213
08/2923:59214
08/3023:59195
08/3123:59176
09/0123:59147
09/0201:00198
09/0301:00149
09/0402:001710
10/0123:59176
10/0201:00197
10/0301:00118
10/1923:001424
10/2023:002325
10/2123:002826
10/2223:003227
10/2323:003528
10/2423:003529
10/2523:00341
10/2623:59382
10/2723:59383
10/2823:59344
10/2923:59275
10/3023:59196
10/3123:59107
11/0201:00188
11/0304:00219
11/0404:001010