[AZ-Observing] Re: MM date limits (again)

  • From: "Jones, Jack (AZ75)" <jack.jones@xxxxxxxxxxxxx>
  • To: "'az-observing@xxxxxxxxxxxxx'" <az-observing@xxxxxxxxxxxxx>
  • Date: Thu, 18 Mar 2004 11:30:31 -0700

Oops, backwards. For -12 degrees that would be a little Less civil and
little More nautical. Now he prob will be less civil!   :-)

Jack

> http://aa.usno.navy.mil/faq/docs/RST_defs.html
> 
> Civil twilight is defined to begin in the morning, and to end 
> in the evening
> when the center of the Sun is geometrically 6 degrees below 
> the horizon.
> 
> Nautical twilight is defined to begin in the morning, and to 
> end in the
> evening, when the center of the sun is geometrically 12 
> degrees below the
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