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New Naked Eye Comet - 17/P Holmes

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16 years 3 months ago #54038 by phoenix
Replied by phoenix on topic Re: New Naked Eye Comet - 17/P Holmes
Dave,

I may be preaching to the wise on this but if you know the image scale with the camera, ie arcsec per pixel, then you can measure the angular distance from an image and use this with the published distance to the object in the small angle formula

astronomyonline.org/Science/SmallAngleFormula.asp

Kieran
16" ODK (incoming), Mesu Mount 200, APM TMB 80mm, SXV H16, SXV H9
J16 An Carraig Observatory
ancarraigobservatory.co.uk/

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16 years 3 months ago #54039 by phoenix
Replied by phoenix on topic Re: New Naked Eye Comet - 17/P Holmes

Tuttle might as well just give up!


Seanie,

just wait til the end of December when it skirts M33, should be a lovely photo op.

Kieran
16" ODK (incoming), Mesu Mount 200, APM TMB 80mm, SXV H16, SXV H9
J16 An Carraig Observatory
ancarraigobservatory.co.uk/

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16 years 3 months ago #54040 by dave_lillis
Replied by dave_lillis on topic Re: New Naked Eye Comet - 17/P Holmes
Hi Kieran,
For my SCT setup its even more painful then that as the arc second per pixel is not a constant, it changes depending on the distance between the back of the scope and the camera, the only way I'd be able to figure the FOV of the image is to open starrynight for that FOV and measure it, I'll get around to doing that during the week maybe.

Dave L. on facebook , See my images in flickr
Chairman. Shannonside Astronomy Club (Limerick)

Carrying around my 20" obsession is going to kill me,
but what a way to go. :)
+ 12"LX200, MK67, Meade2045, 4"refractor

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16 years 3 months ago #54041 by phoenix
Replied by phoenix on topic Re: New Naked Eye Comet - 17/P Holmes
Dave,

Who said astronomy was a hobby, sometimes you have to work at it :lol: . In the Dob is it not starting to blind you?

Kieran
16" ODK (incoming), Mesu Mount 200, APM TMB 80mm, SXV H16, SXV H9
J16 An Carraig Observatory
ancarraigobservatory.co.uk/

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16 years 3 months ago #54053 by Seanie_Morris
Replied by Seanie_Morris on topic Re: New Naked Eye Comet - 17/P Holmes

Tuttle might as well just give up!


Seanie,

just wait til the end of December when it skirts M33, should be a lovely photo op.


Then I take that back. Lets hope that a nice wide field shot opportunity beckons with my 300mm lens!

;)

Midlands Astronomy Club.
Radio Presenter (Midlands 103), Space Enthusiast, Astronomy Outreach Co-ordinator.
Former IFAS Chairperson and Secretary.

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16 years 3 months ago #54063 by Frank Ryan
Replied by Frank Ryan on topic Re: New Naked Eye Comet - 17/P Holmes

Tuttle might as well just give up!


Seanie,

just wait til the end of December when it skirts M33, should be a lovely photo op.



Or wait further until the 3rd of May when it encounters M38
:D

My Astrophotography
Shannonside Astronomy Club __________________________________________
Meade ETX-125PE, Bresser 10 x 50 Binos & Me Peepers

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