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The
solar analemma
text
and pictures by
Anthony AYIOMAMITIS
Appendix
The
next tables list characteristics of the various analemmas
recorded by the author as well as various parameters discussed in
the previous pages constituing this article. Dates listed in the
schedule (Table 2) are valid whatever the observer's latitude. Only
angular values of azimuth and altitude (Table 1) change according
the recording location.
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Table
1 - Summary of Analemma Characteristics
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Camera
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Analemma
(UT)
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Start/End
Dates
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Nb
Images
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Az
Min
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Az
Max
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Alt
Min
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Alt
Max
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Canon
A-1
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06:00:00
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12/01/02-21/12/02
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411
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83.90°
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123.48°
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2.61°
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32.27°
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Canon
AE-1
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07:00:00
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12/01/02-21/12/02
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43,432
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92.91°
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134.04°
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12.00°
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44.07°
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08:00:00
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12/01/02-21/12/02
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432
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104.27°
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146.31°
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20.02°
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55.68°
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Canon
AE-1
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09:00:00
10:00:00
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27/03/02-21/03/03
27/03/02-21/03/03
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43
43
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121.92°
155.29°
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160.75°
177.39°
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25.57°
28.35°
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66.44°
74.36°
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Canon
A-1
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10:28:16
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12/01/02-21/12/02
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43,139
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176.56°
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186.05°
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28.58°
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75.44°
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Canon
AE-1
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10:28:16
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12/01/02-21/12/02
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52
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176.56°
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186.05°
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28.58°
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75.44°
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Canon
AE-1
Canon
A-1
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11:00:00
12:00:00
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12/01/02-21/12/02
06/01/04-20/12/04
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43
434
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186.24°
202.53°
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209.48°
240.48°
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27.99°
24.53°
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73.81°
65.37°
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Canon
AE-1
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13:00:00
14:00:00
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27/03/02-21/03/03
27/03/02-21/03/03
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43
43
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216.53°
228.39°
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257.13°
268.11°
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18.44°
10.06°
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54.41°
42.76°
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Canon
AE-1
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15:00:00
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12/01/02-21/12/02
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413
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238.61°
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276.98°
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0.59°
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30.96°
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1
Exposures for Jan 12-24 and Dec 21, 2002 not possible due to a total physical obstruction of the solar
disk by a mountain. Supplementary exposure of the partially-obstructed sun
on December taken for illustration purposes.
2
Surimpression problems forced me to record an new analemma in 2003 with a
Canon A-1 body.
3
Exposures for Jan 12, 2002 and Nov 06-Dec 21, 2002 not possible due to a total obstruction of the solar disk by
a mountain. Supplementary multi-exposure of the partially-obstructed sun
on November 2002 taken for illustration purposes.
4
Technical problems with the Canon AE-1 body. All the sequence was repeated in 2004.
Table 2 - Multi-Exposure Schedule
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Jun
21/02
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Jul
16/02
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May
28/02
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Jul
26-27/02
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May
17/02
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Aug
04/02
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May
09/02
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Aug
11/02
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May
02/02
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Aug
18/02
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Apr
25/02
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Aug
24/02
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Apr
19/02
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Aug
30/02
Apr
12-13/02
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Apr
07/02
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Sep
05/02
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Apr
01/02
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Sep
11/02
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Mar
27/02
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Sep
16/02
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Mar
21/02
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Sep
22/02
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Mar
16/02
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Sep
27/02
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Mar
10-11/02
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Oct
03/02
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Mar
05/02
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Oct
08/02
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Feb
27/02
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Oct
14/02
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Feb
21/02
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Oct
20/02
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Feb
15/02
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Oct
26/02
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Feb
09/02
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Nov
01-02/02
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Feb
02/02
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Nov
08-09/02
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Jan
24/02
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Nov
17/02
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Jan
12/02
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Nov
29/02
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Dec
21/02
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Table 3 - Exception Report (Jan 08/02 to Dec 21/02)
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Date
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Analemma
(UT)
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Exception
Description
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Jan
01/02
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All
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Complete
restart of analemma project (11 analemmas).
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Jan
12/02
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06:00:00
15:00:00
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Exposure
of complete (or partial) solar disk not possible due to
obstruction.
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Jan
24/02
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06:00:00
15:00:00
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Exposure
of complete or partial solar disk still not possible.
Partially-obstructed
solar disk imaged for illustration purposes
on
originally scheduled date!
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Feb
02/02
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06:00:00
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Partially-obstructed
solar disk imaged for illustration purposes
on
originally scheduled date!
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Feb
09/02
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All
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Complete
schedule now in effect with no further obstructions.
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Mar
27/02
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09:00:00
10:00:00
11:00:00
12:00:00
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Accidental
film advance and complete restart effective next day for double
analemma.
Accidental
film advance and complete restart effective next day for double
analemma.
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