Michael A. Stecker
mastecker@gmail.com

 


 
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M46
Open star cluster M46 is in the constellation Puppis. Unusual is the pale green doughnut-shaped planetary nebula NGC 2438 (dying star) seen on the right (north) which is not associated with the cluster.  File: M46-30sX51P1AskarF5d5 ASI2600Duo Lpro182024-gradrem-2,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
 
mount:
ZWO AM5 harmonic mount

 imaging camera:
ZWO ASI2600MC Duo color astro-camera
Cropped image

filter:
Optolong L-Pro (anti light pollution filter)

exposure:
30 seconds X 51 (25.5 minutes)
guiding:
SVBony 60 mm f/4 guide scopr (FL= 240 mm) with ZWO ASI662MC guide camera
 
processing software:
Asiair, Photoshop Elements 2021, GraXpert AI gradient remover

photographic site:
West Los Angeles California
(Bortle 9 light polluted sky)
 
 
 

Planetery nebula NGC 2438
 file: M46-120sX45p1Cel925f7ASI533Lpro2122024acrPN.jpg

Photographic Data
telescope:
Celestron EdgeHD 9.25-inch SCT with 0.7X Celestron focal reducer
Aperture: 2350 mm (9.25-inches)
Focal ratio: f/7
Focal Length: 1637 mm
Cropped and enlarged image
 
mount:
ZWO AM5 harmonic mount

imaging camera:
ZWO ASI533MC-Pro color astro-camera
Cropped image

filter:
Optolong L-Pro (anti light pollution filter)

exposure:
120 seconds X 46 (92 minutes)
guiding:
SVBony 60 mm f/4 guide scopr (FL= 240 mm) with ZWO ASI662MC guide camera