The Fascinating Neighborhood of the Star Sadr
(NOTE: This new image replaces an earlier image I had taken. Hope you like it.)
The Fascinating Neighborhood of the Star Sadr
Compared to our Sun, Sadr is an enormous star, with 12 times the Sun's mass and about 150 times the Sun's radius. It is emitting over 33,000 times as much energy as the Sun, at an effective temperature of 6,100 K in its outer envelope. This temperature is what gives the star the characteristic yellow-white hue of an F-type star. Massive stars such as this consume their nuclear fuel much more rapidly than the Sun, so the estimated age of this star is only about 12 million years old. (Wikipedia.org)
Technical Information for This Image
Sadr is the center star in the large cross asterism in the constellation of Cygnus. 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 12 exposures were each 240 seconds, and the gain was set to 120. Auto guiding was done using a William Optics 50mm guide scope with a 200mm FL. Attached to the guide scope was a ZWO ASI183MC 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.
The Fascinating Neighborhood of the Star Sadr
(NOTE: This new image replaces an earlier image I had taken. Hope you like it.)
The Fascinating Neighborhood of the Star Sadr
Compared to our Sun, Sadr is an enormous star, with 12 times the Sun's mass and about 150 times the Sun's radius. It is emitting over 33,000 times as much energy as the Sun, at an effective temperature of 6,100 K in its outer envelope. This temperature is what gives the star the characteristic yellow-white hue of an F-type star. Massive stars such as this consume their nuclear fuel much more rapidly than the Sun, so the estimated age of this star is only about 12 million years old. (Wikipedia.org)
Technical Information for This Image
Sadr is the center star in the large cross asterism in the constellation of Cygnus. 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 12 exposures were each 240 seconds, and the gain was set to 120. Auto guiding was done using a William Optics 50mm guide scope with a 200mm FL. Attached to the guide scope was a ZWO ASI183MC 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.