Celestial hemisphere:  Northern  ·  Constellation: Coma Berenices (Com)  ·  Contains:  HD109030  ·  HD109214  ·  HD109415  ·  HD109627  ·  HD109718  ·  HD109968  ·  HD110135  ·  HD110465  ·  IC 3488  ·  IC 3531  ·  IC 3533  ·  IC 3536  ·  IC 3543  ·  IC 3546  ·  IC 3556  ·  IC 3559  ·  IC 3560  ·  IC 3561  ·  IC 3565  ·  IC 3571  ·  IC 3582  ·  IC 3585  ·  IC 3599  ·  IC 3600  ·  IC 3618  ·  IC 3626  ·  IC 3645  ·  IC 3646  ·  IC 3650  ·  NGC 4494  ·  And 8 more.
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Caldwell 38, Duane Melvin
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Caldwell 38

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Caldwell 38, Duane Melvin
Powered byPixInsight

Caldwell 38

Equipment

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Acquisition details

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Description

15 subs 480 Seconds with luminance filter   4/18/2024  Bortle 6, bad seeing 
120 minutes total integration time

QHY 268 M pro APS-C sensor camera gain =37   offset =7   cooled to -15C

Esprit 100 ED refractor scope 550mm focal length with supplied flattener and no reduction

Eq6R PRO mount with pier extension guiding on ST4 direct cable from Starshoot Autoguider camera with 300mm focal length doublet  refractor guide-scope and PHD

Svbony heaters

QHY 7 pos filter wheel

manual focus using Bahtinov mask

APT capture
Deep Sky Stacker
Pixinsight
PS

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Caldwell 38, Duane Melvin