NGC 2261 Hubble's Variable Nebula

NGC 2261  Hubble's Variable Nebula

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NGC 2261 was discovered by Sir William Herschel in 1783 and has been observed over a century to be variable in nature. Both the changing shape and brightness of this nebula has been recorded photographically to vary from month to month and even from one night to the next. This unusual object was the 200 inch Palomar Observatory's first light image taken by Edwin Hubble on January 26, 1949. The star R Monocerotis illuminates this nebula and is too variable in brightness. A faint nebulous hook extends below the NGC 2261 which visible in this 4.5 hour exposure. HH39 is a Herbig Haro object comprised of a small group of red objects north and above this nebula in the constellation Monoceros.

Date Imaged       :

January 11, 2010

Lens       :

N16 Newtonian at f/5.2

Camera       :


Exposure       :

4.5 hours

Filter       :

LRGB 135,45,45,45min

Mount       :

Losmandy Titan

Location       :

Stardust Observatory, Baguio, Philippines