New discovery StDr object 4 / SNR G210.5+1.3

Hello all together!

Last winter a newly discovered object in Monoceros was on the exposure program in 16 nights between December and March. This time also with “smaller” technical difficulties like a defective filter wheel, which required a trip to the observatory and exchange of the camera.
In the end I sent the sum images to Marcel, who processed them to one image. Voyager with DragScript always did a perfect job.

Strottner-Drechsler Object 4 / SNR G210.5+1.3 is a spectrum-confirmed, previously unknown supernova remnant in the constellation Monoceros, discovered by Marcel Drechsler and Xavier Strottner in August 2019. With a diameter of 25 arcminutes, SNR G210.5+1.3 is one of the smaller supernova remnants, suggesting a relatively large distance. Since no central star in the form of a neutron star or pulsar could be found so far, it was not possible to determine the exact distance of SNR G210.5+1.3. Examination of the spectra showed strong [SII] emission compared to H-alpha ([SII] images would therefore not have been bad) with some evidence of [O I] emission. H-beta is conspicuous by its absence, being absorbed or strongly scattered by something in the foreground. Presumably due to dust - the SNR must therefore be behind it and thus it can be concluded that the object must be quite distant. G210.5+1.3 could also be quite old, as there is only faint [O III] emission. What is special and surprising about this supernova remnant is the amazingly precise separation between H-alpha (red) and [OIII] (blue), which seems to break out of the main structure like a bubble.


45 h StDr object 4 with 10" Newtonian @ f = 1000 mm

All the best,
Markus, Marcel and Xavier

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Amazing shot and excellent discovery as always. Congrats!

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Amazing work! well done.

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Absolutely beautiful! Congratulations on the discovery :+1:

Roberto

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Congratulations to all, thats incredible !!!.. really happy you use Voyager for this kind of discovery !
Top quality stuff.

All the best
Leonardo Orazi

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It looks like a human face noting the forehead, eyes, nose, mouth, and chin.

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Thank you all for the nice lines! I also see the human face…maybe we can still think of a suitable name. We still have one or the other discovery in the pipeline…always with participation of Voyager. Love the software!

All the best,
Markus

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Congratulations on the discovery, amazing work.

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Absolutely stunning.

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Congratulations to your team. Beautiful amazing object…

Jon

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