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Solar eclipses and elongation



 
 
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  #1  
Old April 21st 07, 10:36 AM posted to sci.astro
Cristiano
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Posts: 3
Default Solar eclipses and elongation

I wrote a PC program to simulate solar and lunar eclipses.

When I need to find the next solar eclipse, I use the elongation of the
Moon. Does anybody know the maximum elongation at which a solar ecplipse
could be seen?

Thanks
Cristiano


  #2  
Old April 21st 07, 09:36 PM posted to sci.astro
Greg Neill
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Posts: 163
Default Solar eclipses and elongation

"Cristiano" wrote in message ...
I wrote a PC program to simulate solar and lunar eclipses.

When I need to find the next solar eclipse, I use the elongation of the
Moon. Does anybody know the maximum elongation at which a solar ecplipse
could be seen?


Assuming that elongation is measured from the geocentric,
and that the Earth and Moon are both near perihelion and
perigee respectively, and further assuming that the
observer is where the tangent line joining the limbs of the
Earth and sun kisses the Earth, then I calculate about
2.00 degrees for the elongation.

Of course, this does not take into account any atmospheric
effects like diffraction.


  #3  
Old April 21st 07, 10:45 PM posted to sci.astro
Greg Neill
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Posts: 163
Default Solar eclipses and elongation

"Greg Neill" wrote in message
m...
"Cristiano" wrote in message ...
I wrote a PC program to simulate solar and lunar eclipses.

When I need to find the next solar eclipse, I use the elongation of the
Moon. Does anybody know the maximum elongation at which a solar ecplipse
could be seen?


Assuming that elongation is measured from the geocentric,
and that the Earth and Moon are both near perihelion and
perigee respectively, and further assuming that the
observer is where the tangent line joining the limbs of the
Earth and sun kisses the Earth, then I calculate about
2.00 degrees for the elongation.


Sorry, make that about 1.55 degrees.


Of course, this does not take into account any atmospheric
effects like diffraction.




  #4  
Old April 21st 07, 11:52 PM posted to sci.astro
Cristiano
external usenet poster
 
Posts: 3
Default Solar eclipses and elongation

Greg Neill wrote:
"Greg Neill" wrote in message
m...
"Cristiano" wrote in message
...
I wrote a PC program to simulate solar and lunar eclipses.

When I need to find the next solar eclipse, I use the elongation of
the Moon. Does anybody know the maximum elongation at which a solar
ecplipse could be seen?


Assuming that elongation is measured from the geocentric,
and that the Earth and Moon are both near perihelion and
perigee respectively, and further assuming that the
observer is where the tangent line joining the limbs of the
Earth and sun kisses the Earth, then I calculate about
2.00 degrees for the elongation.


Sorry, make that about 1.55 degrees.


Good! The maximum elongation at which I saw an eclipse was 1.5615 deg (at
JD= 2515188.4436279).

Thank you
Cristiano


 




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