Celestial hemisphere:  Northern  ·  Constellation: Hercules (Her)  ·  Contains:  Hercules Globular Cluster  ·  IC 4617  ·  M 13  ·  NGC 6205
M13 - Hercules Globular Cluster from my Bortle 9 backyard, Philipp Müller
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M13 - Hercules Globular Cluster from my Bortle 9 backyard

M13 - Hercules Globular Cluster from my Bortle 9 backyard, Philipp Müller
Powered byPixInsight

M13 - Hercules Globular Cluster from my Bortle 9 backyard

Equipment

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Acquisition details

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Description

Data acquisition:
- 2022 May 16/17 - R Channel About 150x120secs
- 2022 May 17/18 - B Channel About 120x120secs
- 2022 May 23/24 - G Channel About 80x120secs

Stacked and processed in PixInsight:
StarAllignment/Dynamic Crop/Masked Stretch/Dynamic Background Extraction/Linear Fit/Channel Combination/SCNR/RC NoiseXterminator
No deconvolution performed

Gear:
Mount: 10Micron GM1000 HPS

Scope: Celestron Edge HD 9.25" with 0.7x reducer (FL 1645mm))

Main Camera: ZWO ASI 2600MM

Primalucelab Esatto 2" Focuser

ZWO EFW with Astrodon I-Series Gen 2 LRGB filters

ZWO OAG-L with ZWO 174MM Mini guiding camera

Hybrid-guiding - most of the "work" is performed by mount's absolute encoders - used in all 3 nights.

From a Bortle 9 backyard in the heart of Miami.

NINA used for modeling and data acquisition
PHD2 for Guiding

Median FWHM 2.644 px
Median Eccentricity 0.4130

Comments

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Histogram

M13 - Hercules Globular Cluster from my Bortle 9 backyard, Philipp Müller