NGC 457 The Owl Cluster Taken With William Optics Zenithstar 81
NGC 457 The Owl Cluster Taken With William Optics Zenithstar 81
NGC 457 (also known as the Owl Cluster, the ET Cluster, or Caldwell 13) is an open star cluster in the constellation Cassiopeia. It was discovered by William Herschel in 1787, and lies over 7,900 light years away from the Sun. It has an estimated age of 21 million years. ... The cluster features a rich field of about 150 stars of magnitudes 12-15. (Wikipedia.org)
Technical Information for This Image
This image was taken with a William Optics Zenithstar 81 APO Doublet Refractor on an iOptron CEM25P mount. This telescope is a very compact unit and has optical elements made of FPL53 glass and is actually considerably sharper than some of my larger telescopes. The main imaging camera, attached to the prime focus of the telescope was a ZWO ASI294MC Pro cooled camera which was cooled to -5C. The 61 exposures were each 120 seconds, and the gain was set to 120. An Optolong L-Pro filter was used in capturing the exposures. Auto guiding was done using a Skywatcher EVO Guide 50mm refractor attached to a ZWO ASI290MC camera which was connected to PHD2 autoguiding software. Capturing was done with Astrophotography Tool (APT) software and post processed with Pixinsight software with finishing touches put in using Adobe Photoshop Creative Cloud. Polar Alignment for the evening was done using SharpCap software.
NGC 457 The Owl Cluster Taken With William Optics Zenithstar 81
NGC 457 The Owl Cluster Taken With William Optics Zenithstar 81
NGC 457 (also known as the Owl Cluster, the ET Cluster, or Caldwell 13) is an open star cluster in the constellation Cassiopeia. It was discovered by William Herschel in 1787, and lies over 7,900 light years away from the Sun. It has an estimated age of 21 million years. ... The cluster features a rich field of about 150 stars of magnitudes 12-15. (Wikipedia.org)
Technical Information for This Image
This image was taken with a William Optics Zenithstar 81 APO Doublet Refractor on an iOptron CEM25P mount. This telescope is a very compact unit and has optical elements made of FPL53 glass and is actually considerably sharper than some of my larger telescopes. The main imaging camera, attached to the prime focus of the telescope was a ZWO ASI294MC Pro cooled camera which was cooled to -5C. The 61 exposures were each 120 seconds, and the gain was set to 120. An Optolong L-Pro filter was used in capturing the exposures. Auto guiding was done using a Skywatcher EVO Guide 50mm refractor attached to a ZWO ASI290MC camera which was connected to PHD2 autoguiding software. Capturing was done with Astrophotography Tool (APT) software and post processed with Pixinsight software with finishing touches put in using Adobe Photoshop Creative Cloud. Polar Alignment for the evening was done using SharpCap software.