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Rarities in Auriga: SNR G179.0+2.6 and PN IPHASX J055226.2+323724 in M37


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Sorry for the very complicated title of this image, but it contains both a SNR and a PN and none of them have any more romantic names than these designations.

The Ha-emitting planetary nebula (IPHASX J055226.2+323724) lies in the star cluster M37 and was first reported in 2022 (https://iopscience.iop.org/article/10.3847/2041-8213/ac88c1). I only know about one other image of it since then, made by Sven Eklund and Marcel Drechsler (https://www.imagingdeepspace.com/iphasx-j0552262323724.html). It is believed to be the oldest visible planetary nebula. The Ha signal is much stronger than the Oiii.

The supernova remnant (G179.0+2.6) is quite big and therefore old and faint. I only know of three other images of it here on Astrobin. It is quite close to a more famous SNR: the Spaghetti nebula, as can be seen in this wide field image by Rolf Dietrich (https://www.astrobin.com/j0p1vg/).

Finally, there is a faint bluish space oddity near the bottom left. It puzzled me first but the Astrobin annotation says it is galaxy PGC 17836, and it seems partly obscured by dark nebulosity from our galaxy.

Caught last night with my dual-RASA8 rig with ASI2600MC and IDAS NBZ dual band filter (Ha+Oiii). 72 x 5 min, so 6 hours. Processed in PI and PS, of course using the new XTerminator tools.

Cheers, Göran

20230326 M37 RASA1+2 PS14smallSign.jpg

Edited by gorann
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Posted (edited)

This is what my piggybacking Samyang 135 caught during 3.4 hours while my RASAs caught this PN and SNR (see https://www.astrobin.com/t79g7q/). Maybe it makes SNR G179.0+2.6 (centrally in the image) even more mysterious looking. Up to the left you can see parts of the Spaghetti Nebula. Oddly enough the two large red nubulae to the right are apparently not annotated in any of the major catalogues.

I added RASA data to the central part of the image.




20230320-26 M37 SY135 PS15smallSign.jpg

Edited by gorann
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