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Sun under the Arc de Triomphe
Publiée le 2006-01-24

Each year in February, it is possible to photograph the Sun rising under the arch of the Triumphal arch. When one places oneself at the good distance compared to the Triumphal arch, the apparent diameter of the arch is equal to the apparent diameter of the Sun. For the rising, the ideal position is the avenue of Neuilly to the height of the place of the Market, but alas, the prospect for the arch is encumbered by disgracieux tricolour fires, one must thus be placed on the quay level of the public garden of the place of the Maillot door. In this case the arch of the Arc has an apparent diameter larger than the apparent diameter of the Sun. It will be possible to photograph the Sun with its rising since the Maillot place from the 4 to February 7.

Dates and moments of catches of sight of the Sun in the axis of the arch of the Triumphal arch since the public garden of the Place Maillot:

These calculations are forecasts holding account of the atmospheric refraction and the disalignment between an observer located at the center of the public garden of the Maillot place in the axis of the Triumphal arch. An even tiny variation with this axis can induce notable differences in the azimuth of the Sun (one meter on the right or on the left changes the azimuth from approximately 3,19 ') and of the differences in time of a few tens of seconds on the forecasts. If you move towards the left of the axis, the shift is positive, if you move towards the line of the axis the time lag is done negatively.

Date	Sunrise (center)	Time of alignment of the center in the axis of the arch	Variation height of the center
February 4, 2006	at 8h 25m 27s french standard time	from 8h 26m 00s to 8h 26m 20s french standard time	from 4' 13" to 6' 49"
February 5, 2006	at 8h 23m 57s french standard time	from 8h 27m 00s to 8h 27m 20s french standard time	from 23' 57" to 26' 36"
February 6, 2006	at 8h 22m 25s french standard time	from 8h 28m 10s to 8h 28m 30s french standard time	from 45' 43" to 48' 25"
February 7, 2006	at 8h 20m 51s french standard time	from 8h 29m 10s to 8h 29m 30s french standard time	from 1° 6' 47" to 1° 9' 31"

CAUTION: even at low altitude the direct observation of the Sun can be dangerous for the sight (and for your camera). For the photographs, there is risk of over-exposure, to think of equipping your camera with a filter if this one does not authorize very short durations.


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