Eohippus nebula and r.a.g M45

[dugnsuz (Doug)]

Hello all,
Never heard of the Eohippus nebula eh!?
Well, it's a tiny horsehead!

Image details…
Taken under a bright half moon 8.12.08
Canon 40D (modded)

Canon 70-200mm f4L lens, 200mm @ f4
Skywatcher Synscan EQ5 mount
Autoguided with PHD
16x300sec, iso1600 ICNR on, flats subtracted.

Is the artefact ringed in the second pic lens flare?
They were on all subs at the same place and not removed by flats - no obvious dust/muck on lens or sensor either.

No High Res

Cheers for having a neb!
Doug

[Martin Pugh]

Another lovely DSLR shot from you Doug.

I would probably put those down to some sort of reflection...I know that when I image in this area I have huge reflections coming off those nearby bright stars.....and you say this was imaged with a bright moon..so, probably a reflection.

cheers
Martin

[dugnsuz (Doug)]

also...
r.a.g M45

Rough as guts M45!!

[dugnsuz (Doug)]

Originally Posted by Martin Pugh

Another lovely DSLR shot from you Doug.

I would probably put those down to some sort of reflection...I know that when I image in this area I have huge reflections coming off those nearby bright stars.....and you say this was imaged with a bright moon..so, probably a reflection.

cheers
Martin

Cheers Martin, hope you're right. I don't need fake elliptical galaxies showing up all over my images!!

[Bassnut (Fred)]

Well Doug, you scraped some attention from an overdone view , nice work. Id say they were undiscovered new objects, works for me

[dugnsuz (Doug)]

Originally Posted by Bassnut

Well Doug, you scraped some attention from an overdone view , nice work. Id say they were undiscovered new objects, works for me

The thread title's a bit "man bites dog", but you've gotta hook em and reel em in Fred!!

[AlexN]

Love the wide field of view... looks great... A bit more to the south and you may have even got M42 into frame (a whole other world of processing pain would have befallen you however)

Great job Doug.

[dugnsuz (Doug)]

Originally Posted by AlexN

Love the wide field of view... looks great... A bit more to the south and you may have even got M42 into frame (a whole other world of processing pain would have befallen you however)

Great job Doug.

Cheers Alex - didn't notice that wee running man running out of shot until I was processing it. That whole HH/M42 region should nicely fit the 200mm FOV or thereabouts. Take a few 30sec shots for core burn-out and I'm good to go!!

[AlexN]

I've investigated this in starry night.. 140mm will encompass Orions sword and belt... A beautiful region of nebulosity and fine minute detail... I vote go for it!

[avandonk]

Doug generally internal reflections in lenses occur from bright stars the same distance away from center as the star that caused it. The center star in your image is sitting on its own reflection. Sigma Orionis is causing the reflection at the left. The other is caused by Anilam the central star in Orions belt. Even with the best antireflection coatings a tiny amount of reflection from a very bright star is quite noticeable.

Bert

[dugnsuz (Doug)]

Originally Posted by avandonk

Doug generally internal reflections in lenses occur from bright stars the same distance away from center as the star that caused it. The center star in your image is sitting on its own reflection. Sigma Orionis is causing the reflection at the left. The other is caused by Anilam the central star in Orions belt. Even with the best antireflection coatings a tiny amount of reflection from a very bright star is quite noticeable.

Bert

Cheers Bert,
Makes sense - the half moon seems an unlikely suspect now as it would have been in completely different places in the sky at the start and end of the imaging session, but the reflection remains at a constant spot on all the subs. These reflectons are a first for me - or at least I haven't noticed them before! Thanks for helping to clear that up.
Doug