Need help what this is

[amus]

I took a few pics with my sigma 70-200 f/2.8 at 200mm ( 5 min single pic ) around Vega and i got this green looking nebula that i dont know what it is ??

Need help :-)

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[amus]

One more

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[nephilim]

Its got me stumped, looks a litlle like a sprite (basically lightening that goes up rather than down https://directory.eoportal.org/web/eoportal/satellite-missions/s/spritesat ) although cant really see it been one of them .

Steve

[Pete Presland]

some sort of internal reflection in the camera maybe or something tiny on the lens? i dont think its anything astronomical.

[amus]

One more, little better

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[amus]

Weird cause i took like 20 other pics around the same area and it didnt show up on thoose pics ??

If it was some reflection it would show on them to ??

[amus]

Original picture

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[Welrod50]

It doesn't look like any type of lens flare. But unless you have discovered a new nebula ( ) I would suggest some type of terrestrial lightning/aurorae?

[amus]

This is M101 like 10 min later

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[continuum]

If you join Flickr.com you can then join the Astrometry Group who may be able to identify your object.

Ron

[Superdavo]

The stars seem unusually spiky, I wonder if that has anything to do with it

[Freddie]

You have a similar strange pattern around all your stars in the shot so there is definitely something optical going on there.

[Ewan]

Hi, i can't tell for sure the orientation of this shot but it may be coma produced by Hip 92791 & Hip 92728 (no laughing please), i am just comparing your shot with Stellarium.

You have a similar strange pattern around all your stars in the shot so there is definitely something optical going on there.

Like Freddie most of the stars have this artifact, i have something similar, more prominent on larger stars, if i use my f1.8 wide open so i have to stop it down & mine looks like coma, that's my best guess sorry if i am way off though.

[lukebl]

It's definitely some sort of internal lens reflection, caused by the intense brightness of Vega.

[amus]

I will put a link to the raw file later, maybe some one can look at it and see what it is

[Luis Campos]

Maybe condensation in your lens, maybe a drop or moisture in that area? Seems like it's related to optical reflections/distorsion caused by near by Vega.

Greets,

Luís

[Daniel-K]

id say a reflection from that bright star, i have a similar result

[Gina]

By Jove - you've caught a UFO

[amus]

Links to thoose two Raw files : https://www.dropbox.com/s/k2sagbpp54lzrpb/IMG_3449.CR2 , https://www.dropbox.com/s/gs10kmicnmcqou8/IMG_3448.CR2 have a look at them and tell me what you see :-)

[Freddie]

It isn't just related to the bright star as you can clearly see a similar pattern around the stars in your M101 shot. Don't know exactly what is causing it, but you have some kind of optical issue there with all your shots.

[davew]

If the very first image you posted is full frame then it looks like internal reflections. Look where the centre of the image is then see how the bright star and flare are equally spaced either side.

This would naturally lead you to assume that if you moved the star slightly further away from centre the flare would also move away from centre. This is not always the case. A zoom lens has an awful lot of reflective surfaces that send light all over the place. The same may also not follow if you moved the star closer to the centre.

Just be aware where you're pointing when a bright star is in frame. The other one to watch is if a bright star is just out of frame where you can end up with flaring right across the image.

This leads straight into the genius of Fraunhofer. He designed a prescription where neither of the front lenses reflected off each other and then down the tube to the eyepiece.

Dave.

[amus]

The first is full frame yes, and yes i can see what you mean it mirrors over to the same spot on the other half.

maybe its something to do with the Roxcore UV-filter i have on the lens ??

[davew]

That's possible. I wouldn't use an external filter when imaging unless you have to ie, an LP filter.

Have another go without it and see.

Dave.