Print Page - NGC4565 from High Halden

Title: NGC4565 from High Halden
Post by: MarkS on Apr 12, 2011, 22:31:08

Here's the 2nd of my "first light" images from High Halden on 10 April 2011

Fay and Chris have tackled this, so I thought I'd add my own version.

Modified Canon 350D on Tak Epsilon 180ED ( F2.8 ) with IR/UV filter.
24 x 5min exposures

(http://www.markshelley.co.uk/Astronomy/2011/ngc4565_10042011_crop.jpg)

Larger image is here: http://www.markshelley.co.uk/Astronomy/2011/ngc4565_10042011.jpg (http://www.markshelley.co.uk/Astronomy/2011/ngc4565_10042011.jpg)

But what is this to the bottom right of the larger image:
(http://www.markshelley.co.uk/Astronomy/2011/whatisthis.jpg)

Mark

Title: Re: NGC4565 from High Halden
Post by: mickw on Apr 13, 2011, 01:10:59

I reckon it's an artefact. It appears to be behind USNO J1230480+252407, just below IC3439

Great image by the way

Title: Re: NGC4565 from High Halden
Post by: MarkS on Apr 13, 2011, 07:42:56

Quote from: mickw
I reckon it's an artefact. It appears to be behind USNO J1230480+252407, just below IC3439

Rats! I was hoping I had captured some gravitational lensing effect :roll:

In any case it's not an ideal subject for such a short focal length - I'm just waiting for nebula season to come round again!

Mark

Title: Re: NGC4565 from High Halden
Post by: PhilB on Apr 13, 2011, 07:57:29

Quote from: MarkS on Apr 13, 2011, 07:42:56
Rats! I was hoping I had captured some gravitational lensing effect

Next week, maybe...

Very nice image, Mark

Title: Re: NGC4565 from High Halden
Post by: mickw on Apr 13, 2011, 09:02:51

QuoteRats! I was hoping I had captured some gravitational lensing effect

On reflection, it could be but there would have to be something really big in the way to produce a straight line I would have thought.

Title: Re: NGC4565 from High Halden
Post by: Rocket Pooch on Apr 13, 2011, 09:16:09

Very nice image, I got a meteor blowing up in one of my frames I'll dig it out. Well burning up...

Title: Re: NGC4565 from High Halden
Post by: The Thing on Apr 13, 2011, 11:54:39

Mark,

I got an artefact similar to this when I got a star lined up with a drying mark under the glass over the CCD of my 350Da. It was shown at the monthly meeting and I think everyone thought I had captured something wonderful - I had meant to crop it out! Wish I could find the image, it's on here somewhere.

Duncan

Title: Re: NGC4565 from High Halden
Post by: mickw on Apr 15, 2011, 10:15:53

The weird artifact thingy looks very similar to an Iridium flare - an example in Sky at Night May Hotshots - Milky Way

Doesn't explain how it got behind the star though - if it is a star :alien:

Title: Re: NGC4565 from High Halden
Post by: MarkS on Apr 15, 2011, 10:50:26

Quote from: mickw
The weird artifact thingy looks very similar to an Iridium flare - an example in Sky at Night May Hotshots - Milky Way

The artifact was in every sub ...

Title: Re: NGC4565 from High Halden
Post by: mickw on Apr 15, 2011, 11:32:00

:-?
If your full size version is not a crop, the artifact does not seem to be parallel to an edge so could be an "item"

If the skies ever clear again, perhaps try and centre on it.

Title: Re: NGC4565 from High Halden
Post by: JohnP on Apr 15, 2011, 11:54:04

Maybe you should see if there are any 'galaxy clumps' in that part of your image.... :D

http://www.spacetelescope.org/images/heic1106c/

Title: Re: NGC4565 from High Halden
Post by: Whitters on Apr 19, 2011, 19:24:26

I could not see anything on the POSS plates. There is a relatively 'bright' mag 5 star nearby, is it possible that the artefact has come from the star?

Title: Re: NGC4565 from High Halden
Post by: MarkS on Apr 19, 2011, 22:30:25

Quote from: Whitters
There is a relatively 'bright' mag 5 star nearby, is it possible that the artefact has come from the star?

Quite possibly - yes.

Mark

Orpington Astronomical Society

Astronomy => Astrophotography => Topic started by: MarkS on Apr 12, 2011, 22:31:08