AstronoMike.Net
The Astrophoto's Directory		 Friday 05 December 2008 - 11h48 GMT
10572 photos on the site
The last 10 photos
Version française  English Version  Version español Home Add your photos Sky Charts Forum Weather
Welcome Identification :  Password :  Auto Become a member
Password lost ?
Directory Root >> Events >> Atmospheric Optics >> Halos >> Tangent arcs

Arc tangent supérieur 12 (567 x 425 - 18 Ko)

©Serge Vasseur [info]

Photo taken on Wednesday 23 August 2006 in Presles "La Rue" (Val d'Oise)
[Digital Photo Camera]
CANON Powershot S 50
Exposure : 1/1500s à 8,0
[Without telescope]
seen 783 times
Author 's note :
Heure locale: 15h55
Hauteur du soleil 44°
On remarquera l'évolution rapide du ciel et de son couvert légèrement nuageux. Les cumulus sont proches, on peut ranger l'APN!
Schéma de simulation sur cliché "Arc tangent supérieur 11".
A cette heure de la journée l'arc TS donne une allure assez plate, alors qu'un halo serait plus marqué; (Voir sur le schéma l'écart angulaire des deux arcs).
Traitement de l'image.

Internet users' notes :
Notes only available for members.
no note

Adjust the brightness and contrast of your monitor so that you can see each step separately.
Pay more attention to the black steps here. The darkest step should be as dark as you can
make it while still being able to distinguish it from the next lighter step.

AstronoMike ©2002 - 2008 - All rights reserved - Legal stuff - Site registered to the CNIL n°853997
All product names mentioned herein may be trademarks or registered trademarks of their respective companies.
[visitors on the site visitors on the site] [993 members registered] - Paroles de chansons photos astronomiques annuaire photo 		HTML 4.01 CSS