Messier 15 Globular Cluster in Pegasus
Messier 15 Global Cluster in the Pegasus
Messier 15 or M15 (also designated NGC 7078) is a globular cluster in the constellation Pegasus. It was discovered by Jean-Dominique Maraldi in 1746 and included in Charles Messier's catalogue of comet-like objects in 1764. At an estimated 12.0 billion years old, it is one of the oldest known globular clusters.
M 15 is about 33,600 light-years from Earth, and 175 light-years in diameter. It has an absolute magnitude of −9.2, which translates to a total luminosity of 360,000 times that of the Sun. Messier 15 is one of the most densely packed globulars known in the Milky Way galaxy. (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. The main imaging camera, attached to the prime focus of the telescope was a ZWO ASI294MC Pro cooled camera which was cooled to -5C. An Optolong L-Pro filter was used on the camera. The exposures were 26x60 seconds at Bin 1x1. The gain was set to 120. All the settings for polar alignment, acquisition, cooling, exposures, guiding, previewing, and pretty much everything else, was done a ZWO ASIAIR Pro. This little box replaces my laptop computer, three software programs, and adds plate solving, and makes the whole night so much easier. Auto guiding was done using a William Optics 50mm guide scope with a 200mm FL. Attached to the guide scope was a ZWO ASI120MC Mini camera which was connected to the ASIAIR Pro. Capturing was done with the ASIAIR Pro while I sat in the car at a dark sky site and watched and controlled the entire process wirelessly over an iPad using the ASIAIR app. Post processing was done with Pixinsight software with finishing touches put in using Adobe Photoshop Creative Cloud.
Messier 15 Globular Cluster in Pegasus
Messier 15 Global Cluster in the Pegasus
Messier 15 or M15 (also designated NGC 7078) is a globular cluster in the constellation Pegasus. It was discovered by Jean-Dominique Maraldi in 1746 and included in Charles Messier's catalogue of comet-like objects in 1764. At an estimated 12.0 billion years old, it is one of the oldest known globular clusters.
M 15 is about 33,600 light-years from Earth, and 175 light-years in diameter. It has an absolute magnitude of −9.2, which translates to a total luminosity of 360,000 times that of the Sun. Messier 15 is one of the most densely packed globulars known in the Milky Way galaxy. (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. The main imaging camera, attached to the prime focus of the telescope was a ZWO ASI294MC Pro cooled camera which was cooled to -5C. An Optolong L-Pro filter was used on the camera. The exposures were 26x60 seconds at Bin 1x1. The gain was set to 120. All the settings for polar alignment, acquisition, cooling, exposures, guiding, previewing, and pretty much everything else, was done a ZWO ASIAIR Pro. This little box replaces my laptop computer, three software programs, and adds plate solving, and makes the whole night so much easier. Auto guiding was done using a William Optics 50mm guide scope with a 200mm FL. Attached to the guide scope was a ZWO ASI120MC Mini camera which was connected to the ASIAIR Pro. Capturing was done with the ASIAIR Pro while I sat in the car at a dark sky site and watched and controlled the entire process wirelessly over an iPad using the ASIAIR app. Post processing was done with Pixinsight software with finishing touches put in using Adobe Photoshop Creative Cloud.