description Sh2-129 Overview
Sh2-129, also known as the Flying Bat Nebula, is a significant emission nebula located within the Cepheus OB2 association. This region exhibits a distinctive bipolar outflow, designated Ou4, driven by intense star formation. It’s notable for its complex structure and is primarily observed using wide-field telescopes. Astronomers studying stellar nurseries, particularly those investigating the dynamics of outflows and the properties of young stars, find Sh2-129 to be a valuable target.
insights Ranking position
Sh2-129 ranks #107 of 562 in the Nebula ranking, behind LL Pegasi, ahead of Sh2-308.
help Sh2-129 FAQ
Why is Sh2-129 called the Flying Bat Nebula?
Its broad arcs of hydrogen emission resemble the extended wings of a bat in wide-field images. Sh2-129 is a large, faint emission region in the constellation Cepheus.
What is the Squid Nebula inside Sh2-129?
The Squid Nebula is the enormous bipolar structure catalogued as Ou4. French astrophotographer Nicolas Outters discovered it in 2011 while imaging the surrounding Sh2-129 region.
Which filters are used to photograph Sh2-129 and Ou4?
Hydrogen-alpha data reveal the red emission of Sh2-129, while doubly ionized oxygen, or OIII, filters isolate much of Ou4's blue-green signal. Ou4 is exceptionally faint, so deep integrations often require many hours of exposure.
Are Sh2-129 and Ou4 physically connected?
Ou4 appears projected inside Sh2-129, and researchers have investigated whether the structures share the same distance and environment. Their apparent relationship is compelling, but the nature and source of Ou4 have been subjects of continuing study.
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