SH2-224, nestled in the northern constellation of Auriga, emerges as a captivating supernova remnant, approximately 14,700 light-years distant from our solar system. This celestial marvel presents an unconventional shape, resembling a paddy field or gendarme hat, owing to its intricate shell structure interacting with the surrounding interstellar medium.

The enigmatic nature of SH2-224 unfolds through its interactions with a cavity in the interstellar medium, distinguished by its higher temperature compared to the surrounding environment. Through meticulous X-ray studies, astronomers estimate the age of this structure to be between 13,000 and 24,000 years, offering insights into the dynamics of stellar evolution and interstellar interactions.

Captured over the span of 33 hours, this remarkable image of SH2-224 reveals the delicate balance between two interacting gases: the reddish hues of hydrogen and the ethereal green tones of oxygen. Utilizing narrowband filters for hydrogen-alpha and oxygen III, complemented by broadband RGB sessions, the intricate details of the supernova nucleus and surrounding stars are brought to life with vibrant color and depth. As SH2-224 continues to captivate astronomers and enthusiasts alike, it stands as a testament to the enduring beauty and complexity of the cosmos, inviting us to delve deeper into its mysteries.

In this two-panel mosaic of Sh2-223 and Sh2-224 reveals a dynamic interplay of ionized gases and stellar nurseries. Captured through a meticulous blend of imaging data, this celestial composition showcases the radiant hues of hydrogen alpha emissions, portraying the energized regions where massive stars shape their surrounding nebulae. Positioned within the Milky Way, these emission nebulae offer astronomers valuable insights into the ongoing processes of star formation and the sculpting forces of interstellar space.

Image Description and Details :

Sh2-224 is a supernova remnant visible in the constellation of Auriga. It is situated 3.5 ° to SSE of the bright star Capella, the dominant star of the constellation. It is formed by two soft nebulous filaments, the most conspicuous of which is that of the northwest and extends for 20 'x 30' towards the center of the source of radio waves, which has dimensions of 70 'x 75'. The object has an unusual shape, with a shell structure with a radius of about 25 parsec, and is in interaction with a cavity of the interstellar medium at a higher temperature than the surrounding environment, located in the south-western part and of the arch. This conformation suggests that the rest of the supernova in the southwest direction has come into contact with the cavity, first deforming and entering into interaction with this structure, then expanding inside it and creating a wider propagation wave that has emerged from the opposite part, thus creating the arch structure visible in the westernmost part, ie beyond the cavity. The distance of the structure is estimated at about 14,700 light years from the solar system, in a peripheral region of the Arm of Perseus. The X-ray study determined an age of the structure between 13,000 and 24,000 years.​Imaging telescopes or lenses: Takahashi FSQ130EDImaging cameras: ASI 2600MM-PMounts: Takahashi EM 400 Temma 2MGuiding telescopes or lenses: Takahashi FS60CBGuiding cameras: QHY CCD QHY 5 IIFocal Extender / Reducer: NoneSoftware: PHD 2, Pleiades Astrophoto PixInsight , Astro Pixel Processor (for stacking), Sequence Generator Pro SGP (for capture)Filters: Astrodon Ha, OIII & RGBAccessories: SeleTEK2/Robofocus Focuser, ATIK EFW3Original Image: 6237 x 4167 Dates: 2nd Dec - 14th Dec '21 Frames: Astrodon Ha 60 x 10' Astrodon OIII 48 x 10' RGB 3 x 15 x 2'​Total Time: 19 Hours 30 Mins.Center (RA, Dec): (81.717, 42.933)Center (RA, hms): 05h 26m 51.963sCenter (Dec, dms): +42° 55' 58.987"Size: 85.9 x 57.4 arcminRadius: 0.861 degPixel scale: 1.2 arcsec/pixelOrientation: Up is 270 degrees E of N

Copyright: Brendan Kinch

Image Description and Details :

Sh2-224 in HOOlrvb made by Team ARO (astroaro.fr website) in Southern Portugal, Dark Sky Alqueva area. Francis Bozon, Jean-Luc Gangloff, Stéphane Gueyraud. Sh2-224 is a very weak supernova slash in the constellation of the Auriga, with an unusual shape.The acquisition of this photo was made with a Fsq 106 scope on ArEq6 Pro mount and Asi 1600MM camera.

The exposure times are as follows:Ha= 219X300''S2=112x300''O3=179X300''Luminance= 19x60''Red= 21x90''Green =20x60''Blue=23x60''That is a total time of about 33 hours


Copyright: TEAM ARO (Francis Bozon, Jean-Luc Gangloff, Stéphane Gueyraud.)