
New Naked Eye Comet - 17/P Holmes
- ayiomamitis
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Replied by ayiomamitis on topic Re: New Naked Eye Comet - 17/P Holmes
There is a really neat photo on SpaceWeather right now which includes a visible trail as well as structure within the nucleus.
I may have a break in the weather to finally have "first light" (visually and photographically) with this comet later tonight.
Athens, Greece
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- paulevans
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Replied by paulevans on topic Re: New Naked Eye Comet - 17/P Holmes
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- ayiomamitis
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Replied by ayiomamitis on topic Re: New Naked Eye Comet - 17/P Holmes
Yes, this is the photo .... very stunning work!
I will be up all night trying to catch a 2-hr sucker hole for my first glimpse. Fingers crossed.
Athens, Greece
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- daveg
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Replied by daveg on topic Holmes from the 29th
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- dokeeffe
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Replied by dokeeffe on topic Re: New Naked Eye Comet - 17/P Holmes
Nive photo Paul. You can really see the tail in the negative.
Derek
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- Cygnus
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Replied by Cygnus on topic Re: New Naked Eye Comet - 17/P Holmes
thanks Michael O and dmsdona
I was lucky this evening and got a second chance for looking at this comet
it's bigger then 4 days ago and has moved
i made a new montage of this, so you can see the distance it has traveled
along the skies
this and the originals are in my web-folder
i hope you like it
picasaweb.google.nl/H.Nieborg/Astrofotos...#5128798670130880018
LXD75 6"Newton Nikon D70
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- dave_lillis
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Replied by dave_lillis on topic Re: New Naked Eye Comet - 17/P Holmes
Chairman. Shannonside Astronomy Club (Limerick)
Carrying around my 20" obsession is going to kill me,
but what a way to go.

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- Cygnus
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Replied by Cygnus on topic Re: New Naked Eye Comet - 17/P Holmes
i found an article on wikipedia, they talk about a size of 70% of the diameter of the sun:
en.wikipedia.org/wiki/17P/Holmes
interesting article
LXD75 6"Newton Nikon D70
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- phoenix
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Replied by phoenix on topic Re: New Naked Eye Comet - 17/P Holmes
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- paulevans
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Replied by paulevans on topic Re: New Naked Eye Comet - 17/P Holmes
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- Seanie_Morris
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Replied by Seanie_Morris on topic Re: New Naked Eye Comet - 17/P Holmes
Radio Presenter (Midlands 103), Space Enthusiast, Astronomy Outreach Co-ordinator.
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- Seanie_Morris
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Replied by Seanie_Morris on topic Re: New Naked Eye Comet - 17/P Holmes
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- ftodonoghue
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Replied by ftodonoghue on topic Re: New Naked Eye Comet - 17/P Holmes
Trevor
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- dave_lillis
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Replied by dave_lillis on topic Re: New Naked Eye Comet - 17/P Holmes
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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- voyager
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Replied by voyager on topic Re: New Naked Eye Comet - 17/P Holmes
I wouldn't have put it in the astrophotography section, there are images here but there to complement the discussion, I would have had it in the "Solar System Objects" forum or leave it where it was.
I'd agree with that too.
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- dave_lillis
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Replied by dave_lillis on topic Re: New Naked Eye Comet - 17/P Holmes
To think that this thing is nearly the same size as the sun itself, its a truly amazing object.
I was thinking about how to figure out the size of the tail behind it, is there an equation for calculating the tail behind it given the distance from the sun, the strength of the solar wind at that distance, its motion and out gassing rate ???
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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- phoenix
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Replied by phoenix on topic Re: New Naked Eye Comet - 17/P Holmes
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
16" ODK (incoming), Mesu Mount 200, APM TMB 80mm, SXV H16, SXV H9
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ancarraigobservatory.co.uk/
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- phoenix
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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.
16" ODK (incoming), Mesu Mount 200, APM TMB 80mm, SXV H16, SXV H9
J16 An Carraig Observatory
ancarraigobservatory.co.uk/
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- dave_lillis
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Replied by dave_lillis on topic Re: New Naked Eye Comet - 17/P Holmes
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.
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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- phoenix
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Replied by phoenix on topic Re: New Naked Eye Comet - 17/P Holmes
Who said astronomy was a hobby, sometimes you have to work at it

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J16 An Carraig Observatory
ancarraigobservatory.co.uk/
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- Seanie_Morris
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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!

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Former IFAS Chairperson and Secretary.
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- Frank Ryan
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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

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- daveg
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Replied by daveg on topic Re: New Naked Eye Comet - 17/P Holmes
Celestron 80ED piggybacked on a Celestron CG11
Canon Digital Rebel Xt
13 x 1 min exposures plus darks and flats
processing in ImagesPlus; PaintShop Pro; and Photoshop.
6 November at 03:02
Near Birr Ireland
The obvious green coma outer part of the coma is gone but there is a brightening off to the south. There is also an obvious extension of the coma to the south and when I over process the image the ion tail is obvious... will post later.
DaveG
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- JohnMurphy
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Replied by JohnMurphy on topic Re: New Naked Eye Comet - 17/P Holmes
Love to see it pleeease!
Beaut photo by the way, you obviously put a lot of work into this one.
Have a look at this though. It puts us all to shame, I'd love to know more about the exposure details:
spaceweather.com/comets/holmes/09nov07/J...nm9mnsr1c32t6phgs3o6
The comet tonight looked truely remarkable in 15x70 binos. Didn't bother trying to photo because of winds and cloud though. Its getting bigger all the time and the mass of the outburst must now be occupying an area bigger than the sun. Truely a remarkable event, is there any news yet from Nasa on Hubble or Cassini data on this? :?:
John Murphy
Irish Astronomical Society
Check out My Photos
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- dave_lillis
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Replied by dave_lillis on topic Re: New Naked Eye Comet - 17/P Holmes
I'm almost ashamed to say that I haven't seen in in the Dob for over a week now, just no opportune time when i was free.Dave,
Who said astronomy was a hobby, sometimes you have to work at it. In the Dob is it not starting to blind you?

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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