Swan (or Omega) Nebula is one of the brightest and largest
star-forming regions in our galaxy. It measures 15 light-years across
and is about 5,000 light-years from Earth. It is visible in binoculars,
easily seen in small or larger telescopes. The brightness of the swan
portion is cause by radiation from stars of NGC6618, the open
cluster embedded in the nebula. Nebulas IC4706 and IC4707 appear on the
left side of the image, but are actually considered part of the same
HII region. North
is at the bottom and a little to the left.
Orion ED80 Doublet Refractor with AstroTech AT2FF
Field Flattener, Celestron CI-700 Mount
ZWO ASI1600MMC monochrome with ZWO LRGB filters
QHY5L-IIM through Orion Thin OAG, PHD guiding software
L:(48) 150 secs @ gain=60, RGB: each channel (20) 60 sec @ gain=139
Nebulosity, PhotoShop CS2
07-14-2018, Tierra del Sol, CA, slight haze, first light for new ASI1600 camera.