Help identifying nebula please.

[Adreneline]

This is a wide field Ha image of the an area centred on IC1470 taken with my Samyang 135mm + ASI1600MM-Pro combination comprising 65 x 180s subs.

I've used PixInsight and Astrometry.net to plate solve the image but not all features are identified in particular the feature at approx 62deg 30' : 22h 55m.

I can identify Sh2-152, Sh2-157 (Lobster Claw) and Sh2-161 but not the feature in the top left just above the 63 degree marker.

There are Sh2 emissions in the catalogue at 22:58 and 22:59 but they are not at approx 62.5 degrees.

Thanks in advance and for looking.

Adrian

 

[Kinch]

At first glance....looks like Cave Nebula.....but not 100|% sure???

 

[symmetal]

Yes it's the Cave Nebula (Sh2-155). The nebula close to NGC7419 is Sh2-154.

The small circular patch left of the 23h label is Sh2-152 and Sh2-153.

The smudge below the 57 deg label is Sh2-151.

Looks like a very nice image though the jpg compression does it no favours. 

Alan

Edited April 20, 2020 by symmetal

[Adreneline]

25 minutes ago, Kinch said:

At first glance....looks like Cave Nebula.....but not 100% sure???

 

14 minutes ago, symmetal said:

Yes it's the Cave Nebula (Sh2-155). The nebula close to NGC7419 is Sh2-154.

The small circular patch left of the 23h label is Sh2-152 and Sh2-153.

The smudge below the 57 deg label is Sh2-151.

Looks like a very nice image though the jpg compression does it no favours. 

Thank you. I wondered if it was the Cave Nebula but I wasn't sure. You're right - the jpg compression spoils things but the png is a bit on the large side!

I think I'll be trying to get some more Ha and even some OIII over the coming nights if CO is to be believed.

Thanks again.

Adrian

[Adreneline]

1 minute ago, Adreneline said:

the png is a bit on the large side!

What the heck - here is the png version.

Calibrated and integrated in APP, processed in PI and noise reduced in PS.

Thanks again.

[Adreneline]

22 minutes ago, symmetal said:

Yes it's the Cave Nebula (Sh2-155).

I've been a numpty - Sh2-155 is in Cepheus and I was looking in Cassiopeia.

Thanks again.

[symmetal]

1 hour ago, Adreneline said:

What the heck - here is the png version. Calibrated and integrated in APP, processed in PI and noise reduced in PS.

Thanks again.

That's much better.  Did you use dither at all as there is some vertical fixed pattern noise evident in the background.

Alan

[Adreneline]

26 minutes ago, symmetal said:

Did you use dither at all as there is some vertical fixed pattern noise evident in the background.

No, I didn't guide so didn't dither. I find the CEM25 very good at tracking certainly up to 180s and so far my attempts at guiding with the ASIair and ZWO120mini +guide scope have not been encouraging - possibly/probably due to my bad setup of the PHD clone within the ASIair.

I'll take a closer look at the image because I hadn't noticed the artefacts.

Thank you.

Adrian