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Solar Analemma. This outstanding image from Alexandra Hart taken over a period of 4 years charts the midday position of the sun in the sky throughout the year. The north–south component of the analemma results from the change in the Sun's declination due to the tilt of Earth's axis of rotation. The east–west component results from the nonuniform rate of change of the Sun's right ascension, governed by combined effects of Earth's axial tilt and orbital eccentricity.

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Thursday 16th WL & Ca-K

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David_The_Bears_Fan
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Thursday 16th WL & Ca-K

Post by David_The_Bears_Fan » Thu May 16, 2019 8:59 pm

Probably the last early morning session looking at the forecast. Rough conditions this morning but managed a few half-decent shots :beanie:
Thurs-5.jpg
Thurs-5.jpg (821.35 KiB) Viewed 516 times
Thurs-4.jpg
Thurs-4.jpg (555.03 KiB) Viewed 516 times
Thurs-1.jpg
Thurs-1.jpg (700.29 KiB) Viewed 516 times
Thurs-2.jpg
Thurs-2.jpg (908.21 KiB) Viewed 516 times
Thurs-3.jpg
Thurs-3.jpg (151.19 KiB) Viewed 516 times
David

Kit: Skywatcher Evostar 120 on Celestron CG-4 / Coronado PST / Lunt B1200 Ca-K Module / Lacerta Herschel Wedge/ Canon 1100D & 77D / ZWO ASI178MM & 120MC-S / QHY5-II Mono

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ffellah
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Re: Thursday 16th WL & Ca-K

Post by ffellah » Thu May 16, 2019 10:10 pm

Excellent results, David. 2741 shows very well in these images !

Nicely done.

Franco

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Re: Thursday 16th WL & Ca-K

Post by Montana » Fri May 17, 2019 9:26 am

Excellent CaK proms :hamster: it will be sad to see these regions disappear for another 2 weeks, but rain anyway stops play. I bet you enjoyed your lie in bed this morning :)
:bow
Alexandra

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Re: Thursday 16th WL & Ca-K

Post by MAURITS » Fri May 17, 2019 1:01 pm

Lovely images David, nicely done.
Regards,
Maurits

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Re: Thursday 16th WL & Ca-K

Post by eroel » Fri May 17, 2019 1:51 pm

David:
Good session.
Regards,
Eric.

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Re: Thursday 16th WL & Ca-K

Post by marktownley » Sat May 18, 2019 10:22 am

Looks good David! Looks like drizzle is set in for the weekend for me.
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Re: Thursday 16th WL & Ca-K

Post by David_The_Bears_Fan » Sat May 18, 2019 7:06 pm

Thanks all
David

Kit: Skywatcher Evostar 120 on Celestron CG-4 / Coronado PST / Lunt B1200 Ca-K Module / Lacerta Herschel Wedge/ Canon 1100D & 77D / ZWO ASI178MM & 120MC-S / QHY5-II Mono

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