Thread: Winter solstice
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Old November 12th 06, 09:09 PM posted to sci.astro.amateur
SkySea
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Default Winter solstice

Nikolaj wrote:
I have a question; At which longitude will the sun be on Winter
Solstice 2006?


Sam Wormley wrote:
RA 18h 0m 0s Epoch of Date
Ecliptic Long 270° 0m 0s


I think Nikolaj wants to know the longitude on Earth that is facing
the Sun at the moment of the solstice. Offhand, the solstice happens
at 23:32UT. So at what longitude is it local noon at that time? 12
hours from 23:32 gives us 11:32 hours past Greenwich, so at 15 degrees
per hour, that's about 173 longitude - eastern end pf the Siberian
peninsula, mid/west section of the Aleutioan chain, Samoa, Tonga...

How exact do you want it? There's equation of time to consider, if you
need real accuracy.
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