The "Gecko Nebula" is an informal and creative name given to a specific region within the larger LBN (Lynds Bright Nebula) catalog. Specifically, it is often associated with LBN 437, a molecular cloud complex located in the constellation Cepheus.

The name "Gecko Nebula" likely arises from the visual resemblance of dark lanes and structures within the nebula to the patterns on a gecko's skin or the shape of a gecko. Such creative names are often used by amateur astronomers and astrophotographers to make celestial objects more memorable or to highlight interesting features within them.

While the term "Gecko Nebula" is not an official astronomical designation, it reflects the enthusiasm and creativity within the astronomy community. If you're interested in observing or learning more about the Gecko Nebula (LBN 437), it's worth checking astrophotography forums, astronomy websites, or sky observation guides for images and additional information shared by enthusiasts.