NGC 2261, Hubble's Variable Nebula (Roberto Marinoni)

Celestial hemisphere: Northern · Constellation: Monoceros (Mon) · Contains: Hubble's Nebula · NGC 2261

Image of the day 12/26/2024

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NGC 2261, Hubble's Variable Nebula

Link: https://www.robertomarinoni.com/

Image of the day 12/26/2024

Powered byPixInsight

NGC 2261, Hubble's Variable Nebula

Link: https://www.robertomarinoni.com/

NGC 2261 (also known as Hubble's Variable Nebula) is a small nebula located in the constellation Monoceros.
The nebula is illuminated by the star R Monocerotis (R Mon), which is visible at one end of the nebula.

NGC 2261 was imaged as Palomar Observatory's Hale Telescope's first light by Edwin Hubble on January 26, 1949, so I suppose this is the reason why it was named so.
From physical point of view, it is located at 2500 light years and it is known for its (small) changes in shape and brightness, visible also with small telescopes over months or also weeks.
One explanation proposed for the variability is that dense clouds of dust near R Mon periodically block the illumination from the star.
The image is an LRGB, but it is interesting see the faint red background: probably it could be worthy to take also some additional Ha exposures.

Imagers of Italy
Astrofili Dalai Lama
Imaged with Voyager
ZWO ASI2600MM Pro

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Image of the day 12/26/2024

NGC 2261, Hubble's Variable Nebula

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NGC 2261, Hubble's Variable Nebula

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