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15 days old Moon
Boat behind the horizon
Then comes the circumzenithal arc
13978 times
Supralateral Parry arc
11665 times
In brief
10171 times
A bright parhelia at the beginning
9783 times
A nice Parry arc
9127 times
The Parry arc is changing
9039 times
A nice Parry arc
8796 times
 The others pictures of "The great halo of October 28, 2006"
| 1 | 2 | 3 | 4 | 5 | 6 | 7 |

Then comes the circumzenithal arc
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Watching high in the sky, I do see the circumzenithal arc. It is not contrasted, but something else is much more interesting: a supralateral arc and even a Parry supralateral arc. The first display is the big pale circle centered around the Sun tangent to the circumzenithal arc. The Parry supralateral arc is the colored patch in the supralateral arc located at 45° on the right of the Sun. Some German observators have noticed that this halo is visible only once a year!

Click here to identify thoses displays.
Seen 13978 times See the next picture of that series.
Instrument   10 mm focal length
Exposure & film   1/640 s with digital camera Canon 350D + Sigma 10-20 1:4-5.6
Date & place   October 28, 2006, Quimper

 The others pictures of "The great halo of October 28, 2006"
| 1 | 2 | 3 | 4 | 5 | 6 | 7 |

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