A Supernova Remnant in Monoceres (M.J. Post)

Celestial hemisphere: Northern · Constellation: Monoceros (Mon)

A Supernova Remnant in Monoceres, M.J. Post

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A Supernova Remnant in Monoceres

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A Supernova Remnant in Monoceres

It has taken a month to complete data-taking on these objects because, midstream, I switched mounts at my remote observatory in New Mexico. These two nebulae lie between the Rosette and Cone nebulae. The left-most is G206.9 + 2.3, while the right-most is a large planetary nebula candidate discovered in 2021, PaRasMoM1 1. Narrowband signatures of the two are quite dissimilar, as should be expected for their two very different origins. G206 is highly structured with strong emissions in OIII and SII, but weak in H-alpha. PaRasMoMi 1 is nearly a uniform sphere emitting very little in H-alpha or SII but strong in OIII.

This image is the result of six hours of narrowband data - two hours each H-alpha, OIII, and SII - using an 11" RASA telescope at DSNM. The Red channel is a combination of H and S light while both Green and Blue channels use O and S light.

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