ATLAS - the unexpected Supernova Remnant G209.8-8.2 in Orion

Image Title: ATLAS ― the unexpected Supernova Remnant G209.8-8.2 in Orion

Copyright: Yann Sainty, Bray Falls, Marcel Drechsler, Curtis Morgan, Aziz Ettahar Kaeouach, Richard Galli

Location: Hight Atlas Observatory (Oukaimeden Observatory - Morocco)
Sierra Remote Observatories (US)

Image Description and Details: ATLAS - THE TITAN THAT BEARS THE WORLD ON ITS SHOULDERS
Since the early days of astronomy, celestial objects have been named after mythological figures, deities and other cultural elements - a long tradition that is maintained to provide continuity and a link to the history of astronomy. By using such names for new discoveries, the public's attention is drawn to these objects and their significance is emphasized. In Greek mythology, Atlas was a Titan who held up the celestial vault at the westernmost point of the then known world. He is also the personification of the Moroccan Atlas Mountains, where most of the data for G209.9-8.2 was acquired. Due to this fact and its resemblance to a bluish globe, the team unanimously decided to name this previously unknown supernova remnant ATLAS.

THE OBJECT
To get an idea of the enormous size of G209.9-8.2 and considering it as a possible PN, we can take a look at the planetary nebula G208.9-8.0 (TaWe1) located exactly north of G209. 9-8.2, whose bright inner region has a diameter of 145 arcseconds. Together with the oval halo, the PN reaches a full diameter of 330 arc seconds, which is almost as large as the famous Dumbbell Nebula (M27, NGC 6853). Despite the fact that TaWe1 is a comparatively large PN, G209.9-8.2 makes it look downright tiny.

Acquisition:
Dec. 2 - 4, 2023
Dec. 6, 2023
Dec. 9 - 20, 2023
Dec. 22 - 23, 2023
Dec. 29, 2023
Jan. 1, 2024
Jan. 3, 2024
Jan. 5 - 12, 2024
Jan. 16, 2024
Feb. 2 - 4, 2024

Integration (327h):
Ha: 143h
Oiii: 130h
L: 9h
R: 15h
G: 15h
B: 15h

Equipment Details: Equipment:
Planewave DeltaRho 350 · Takahashi FSQ-106EDX4 · Takahashi FSQ-85ED
QHYCCD QHY600PH M · ZWO ASI2600MM Pro · ZWO ASI6200MM Pro
iOptron CEM60EC · iOptron CEM70G · Sky-Watcher EQ6 Pro · Software Bisque Paramount MYT GEM
Antlia HOLRGB 3nm filters · Chroma HORGB filters

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