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Sh2-155 - Nebulosa Grotta
Sh2-155 (also designated Sharpless 155 or S155) is a diffuse nebula in the constellation Cepheus, within a larger nebula complex containing emission, reflection, and dark nebulosity. It is widely known as the Cave Nebula, though that name was applied earlier to Ced 201, a different nebula in Cepheus. Sh2-155 is an ionized H II region with ongoing star formation activity, at an estimated distance of 725 parsecs (2400 light-years) from Earth.
Only 50 minutes of total exposure time @1600iso (180 sec each) with Tecnosky 80/480mm apo triplet + 0.8x reducer corrector + Canon EOS 600D uv cut on a Skywatcher HEQ5 and 60/220 + lacerta autoguider
Co-authors: Valentina Saltarelli and Giorgio Ferrari
Sh2-155 - Nebulosa Grotta
Sh2-155 (also designated Sharpless 155 or S155) is a diffuse nebula in the constellation Cepheus, within a larger nebula complex containing emission, reflection, and dark nebulosity. It is widely known as the Cave Nebula, though that name was applied earlier to Ced 201, a different nebula in Cepheus. Sh2-155 is an ionized H II region with ongoing star formation activity, at an estimated distance of 725 parsecs (2400 light-years) from Earth.
Only 50 minutes of total exposure time @1600iso (180 sec each) with Tecnosky 80/480mm apo triplet + 0.8x reducer corrector + Canon EOS 600D uv cut on a Skywatcher HEQ5 and 60/220 + lacerta autoguider
Co-authors: Valentina Saltarelli and Giorgio Ferrari