PN G204.4-00.4

Constellation: Monoceros

PN G204.4-00.4 is a very faint planetary nebula in the constellation of Monoceros. It is within the SNR G205.5+00.5, also called the Monoceros Loop, part of which can be seen to the NW. Link to interactive sky chart.

Dates:

This is derived from the outstanding data taken by Martin Pugh during December 2025 and January 2026 (Martin’s website: Remote Astrophotography with Martin Pugh (martinpughastrophotography.space).

His telescope is located in Chile (Observatory: El Sauce).

Colour palette is HSO.

Telescope & Mount:

Planewave CDK24 on a Planewave L600 mount.

Imaging:

Camera: Moravian C3-61000 (bin 2×2)

Nebula:
Ha: 33x600s
O3: 48x600s
S2: 42x600s

Stars:
Astrodon R: 25x180s
Astrodon G: 26x180s
Astrodon B: 26x180s

Total integration time: 24h 21′