Michael A. Stecker
mastecker@gmail.com

 


 
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Antares, M4, Sh2-9
Antares, surrounded by a yellow-ornage dust cloud, is the brightest star in the constellation Scorpius.  To its upper right is the small globular cluster NGC 6144.  Below and further to the right is the large globular cluster M4 and at the upper right the red and blue nebula Sharpless 2-9.  This is a joint project of James Foster and Michael Stecker using an Askar 103 APO triplet refractor from Frazier Park California.  The image is cropped.
 file: AntaresLight_Stack_1-RGB3A-JRF-3sm.jpg

Photographic Data
 telescope:
Askar 103 APO triplet refractor with 0.8X focal reducer
Aperture: 103 mm (4-inch)
Focal ratio: f/5.5
Focal Length: 560 mm
cropped image of lowered resolution of 5000 X 3389
 
mount:
iOptron CEM60

 imaging camera:
ZWO ASI2600MC Pro
cropped image
exposure:
200 sec X 17 (56 minutes)
guiding:
off-axis
 
processing software:
Maxim-DL and Photoshop Elements 2021
 .
photographic site:
Pinion Pines Estates (Frazier Park California)
(Bortle 4 at 5,500 ft elevation)