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On this page I collect my observations of the galactic nebula NGC 2359, called Thor's Helmet, in the constellation Canis Major/Great Dog.
The galactic nebula NGC 2359 (Thor's Helmet) in the constellation Canis Major/Great Dog is, according to Stoyan, a good demonstration object for the usefulness of nebula filters. The object was discovered by William Herschel in 1785, but later catalogued as NGC 2361, which according to Wikipedia describes part of the nebula; according to Stoyan, this NGC number is no longer used. A spur to the northwest is designated IC 468.
| NGC 2359 (Thor's Helmet) | NGC 2374 | |
| Size: 9' x 6' (Stoyan) Distance: 13,000 light years (Stoyan) Ranking: ** (Stoyan) |
Size: 12' (Wikipedia) Distance: 4,800 light years (Wikipedia) Ranking: --- |
The galactic nebula NGC 2359 (Thor's Helmet) in the constellation Canis Major/Great Dog (Image Courtesy of SkySafari Astronomy, www.simulationcurriculum.com)
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NGC 2359 - Feb 13, 2023, 1830s |
NGC 2359 - Feb 13, 2023, photo left processed |
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NGC 2359 - Feb 20, 2023, 1830s, Dual Band Filter |
NGC 2359 - Feb 20, 2023, 1830s, photo left processed |
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NGC 2359 - Feb 20, 2023, 1960s, mosaic, Dual Band Filter |
NGC 2359 - Feb 20, 2023, 1960s, photo left processed |
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Evaluation of the mosaic with astrometry.org: NGC 2374, IC 468 |
NGC 2359 - Feb 13, 2023, 1830s, processed, section |
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NGC 2359 - Feb 20, 2023, 1830s, Dual Band Filter, section, processed |
NGC 2359 - Feb 20, 2023, 1960s, mosaic, Dual Band Filter, section, processed |
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NGC 2359, Mar 19, 2025 - 2000, 1 h, Dual Band Filter, section; BalENS on |
NGC 2359, Mar 19, 2025 - 2000, 1 h, Dual Band Filter, section, processed and further processed (AP) |
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NGC 2359, Mar 19, 2025 - 2000, 1 h, Dual Band Filter, section, processed and further processed (AP), denoised (PAI) |
NGC 2359, Mar 19, 2025, 19.3.2025 - 2000, 1 h, Dual Band Filter, section, photo left further processed |
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NGC 2359, Mar 20, 2025 - 2000, 1:25 h, Dual Band Filter, section; BalENS off |
NGC 2359, Mar 20, 2025 - 2000, 1 h, Dual Band Filter, section, processed |
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NGC 2359, Mar 20, 2025 - 2000, 1 h, Dual Band-Filter, section, processed and further processed (AP) |
NGC 2359, Mar 20, 2025 - 2000, 1 h, Dual Band-Filter, section, processed and furhter processed (AP), denoised (PAI) |
