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Mark Eby
May 12, 2020
411
post image

Contains: Deep sky object

Acquisition Details

Date Posted: May 12, 2020

External Link:

Resolutions: 2323x1756 , 800x604 , 300x226

Link to TIFF/FITS:

Equipment card

Description

M3 Globular Cluster M3 was the first Messier object to be discovered by Charles Messier (M1 and M2 were already known.) Boasting around 500,000 stars, it measures 90 light-years across and is located about 34,000 light-years from Earth. It is perhaps the most studied of the globular clusters. Scope/Mount: TS-Optics PhotoLine 130mm F7 APO Refractor with Astro-Tech AT2FF Field-flattener, Celestron CI-700 Mount Camera: ZWO ASI1600MMC monochrome with ZWO LRGB filters Guiding: QHY5L-IIM through Orion Thin OAG, PHD guiding software Exposure: L (30) 120 sec @ gain=80, RGB: each channel (10) 120 sec @ gain=139 Software: Nebulosity, PhotoShop CS2 Comment: 04-25-2020, Tierra del Sol, CA, good conditions.



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