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Analemma at Ancient Nemea ... #3/11

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Analemma at Ancient Nemea ... #3/11 was created by albertw

Anthony posted this to various groups earlier today so I hope he doesnt mind me corssposting here.

Congratulations Anthony, beautiful pictures!

~Al

Dear Friends,

As some of you may recall around this time last year, I had two
analemmas successfully complete during 2002. Unfortunately these two
analemmas were the only ones which completed successfully whereas the
other nine had failed due to slight motion of the film back and forth
within the camera chamber. Of course, I immediately restarted all nine
failed analemmas and I am delighted to provide you with the first of the
nine restarted analemmas and which proved to be successful on my third
annual attempt.

This analemma was taken at late afternoon, representing the motion
of the sun between January and December of 2003 at precisely 16:00:00
LMT. I hope to have additional analemmas over the next couple of weeks
as the films are developed and associated foreground images are
composed. Anyway, I kindly refer you to
www.perseus.gr/Astro-Solar-Analemma-140000.htm . The foreground
is the ruins at Ancient Nemea where Hercules, for example, pursued his
first of twelve labours in relation to the capture and killing of the
Nemean lion.

The lab gave me a serious scare when they handed me the thick (?)
envelope with prints. Expecting a single photo in two different size
formats I was surprised with the thick envelope. When opened, I was
overwhelmed with baby photos. My heart stopped, for a serious mix-up had
occurred and I was looking at a year's effort potentially AWOL! Anyway,
20 minutes after sorting through three boxes of holiday films and
photos, we managed to locate my thin envelope. They still messed up by
printing in the smaller size but I am not going to worry at this point,
for the larger print can wait a few days.

Anyway, enjoy!

Anthony.
Albert White MSc FRAS
Chairperson, International Dark Sky Association - Irish Section
www.darksky.ie/
19 years 3 weeks ago #1760

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Replied by voyager on topic Re: Analemma at Ancient Nemea ... #3/11

That is really cool!

Just wondering what physical process leads to the two sides of the 8 not being symetrical?

Bart B.
My Home Page - www.bartbusschots.ie
19 years 3 weeks ago #1764

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Replied by finnjim2001 on topic Re: Analemma at Ancient Nemea ... #3/11

I'd say its down to the fact that in the summer one hemisphere is tilted towards the sun and in the winter that same hemisphere is tilted. I'd say and please feel free to prove me wrong but would i be right in saying that your latitude would have an effect on the shape. I must see if starry night can help me out. I'll make a predicition and say that at the equator it's a proper figure of 8 :?
Somedays you're the dog,
Somedays you're the lamp post.
19 years 3 weeks ago #1769

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Replied by finnjim2001 on topic Re: Analemma at Ancient Nemea ... #3/11

Oops. :oops: well looks like i was wrong on that one. I'm curious my self now. Have to research that now
Somedays you're the dog,
Somedays you're the lamp post.
19 years 3 weeks ago #1770

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Replied by ayiomamitis on topic Re: Analemma at Ancient Nemea ... #3/11

Dear Al,

First and foremost I would like to thank you for posting my original message to a number of newsgroups in relation to my latest analemma. The response from around the world has been incredible and the best has yet to come, for I have confirmed the successful completion of yet a fourth analemma and I am now working in finalizing the foreground prior to distribution.

I have additional film for processing which, hopefully, will lead to further analemmas. My ultimate objective is to produce a complete set from sunrise to sunset (one-hr intervals) as well as the special case analemma which is perfectly vertical due to being on the southern meridian.

All of the above translates to eleven analemmas in total. I have two which were released in 2002, the third which was released the other day (as per the message you posted) and a fourth due early next week provided I can address the foreground this weekend.

I would like to point out that only seven other examples of the analemma exist in the world. We are talking about VERY select company.

Anthony.
Anthony Ayiomamitis
Athens, Greece
www.perseus.gr
19 years 3 weeks ago #1772

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Replied by ayiomamitis on topic Re: Analemma at Ancient Nemea ... #3/11

I'd say its down to the fact that in the summer one hemisphere is tilted towards the sun and in the winter that same hemisphere is tilted. I'd say and please feel free to prove me wrong but would i be right in saying that your latitude would have an effect on the shape. I must see if starry night can help me out. I'll make a predicition and say that at the equator it's a proper figure of 8 :?


One's latitude does play a role and the impact is the angle of the analemma (ie. the slant it exhibits upon completion). If someone were to pursue the imaging of the analemma at the equator during early morning, they would obtain a perfectly horizontal analemma which was sliced in half right down the middle.

Anthony.
Anthony Ayiomamitis
Athens, Greece
www.perseus.gr
19 years 3 weeks ago #1773

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Replied by ayiomamitis on topic Re: Analemma at Ancient Nemea ... #3/11

That is really cool!

Just wondering what physical process leads to the two sides of the 8 not being symetrical?

Bart B.


Hi Bart,

I apologize for overlooking your message .... I think it has to do with the fact that our planet has an elliptical orbit. With a perfectly circular orbit, we would have a symmetrical figure-8 where both loops would be the same.
Anthony Ayiomamitis
Athens, Greece
www.perseus.gr
19 years 3 weeks ago #1774

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