Astronomical twilight / astro dark

[Guest dawson]

Jut found this website when trying to work out what time is will be 'astro dark' tonight:

 

http://jekophoto.eu/tools/twilight-calculator-blue-hour-golden-hour/index.php

 

In this screen shot, the last column shows the time when astronomical twilight ends and that (I believe) marks the start of astro dark. It is going to be 23:45 tonight, but at the end of the month it will be just after 22:00.

 

James

 

[Guest Tibbz2]

Roll on end of August!

[Guest devil74]

Cracking find J..

[glider]

Yep, and it starts getting light again at 02:30. Isn't summer miserable.

[Brantuk]

Here's a good site for you James - click on the "Insolation" tab for all hours of darkness and light and everything in between. There's loads of other goodies in there too.

 

http://www.skyviewcafe.com/skyview.php

[Guest dawson]

Thanks kim i'll look on my computer tomorrow as everything is too small on an iphone screen

[Tweedledee]

Thanks James.

 

I have bookmarked that site, very useful.

[Guest dawson]

All these little interesting / useful things could be in the EMS astronomy book if we ever got [get] around to writing it, and it could be back up by online resources on a dedicated area on the website... I still think it's a goer

[Guest andyboy1970]

I use Calsky http://www.calsky.com which says 2330 until 0320 tonight for deep sky.

Good find though.