2022 Michael A. Siniscalchi

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Odds n Ends

           Messier 45 
       Open Cluster in Taurus
           RA 03h 47m 24s  Dec: +24 07' 00" Distance - ~444 ly Size 110 arcminutes

Location & Date
Backyard, Abbott Observatory- Long Island, NY,  August 2022
Orion ED80 F/7 APO, Moonlite focuser, iOptron GEM45G, Pegasus Falcon rotator
Image scale 2.54 arcsec/pixel
Baader  L R G B  filters
CCD temp -10C
  Lum- 15 x 3m  Red- 12 x 3m  Green - 12 x 3m  Blue- 12 x 3m  Bin 1x1 for each panel
Planning & Acquisition
Sequence Generator Pro Mosaic tool - 6-panel mosaic

Astro Pixel Processor -  Calibration, Normalize, Mosaic panel assembly
Adobe PS -  L+RGB combine, Color adjustments, Sharpen
RC-Astro Star XTerminator, Noise Xterminator

This is a 6-panel mosaic


The Pleiades also known as The Seven Sisters, Messier 45 and other names by different cultures, is an asterism and an open star cluster containing middle-aged, hot B-type stars in the north-west of the constellation Taurus. At a distance of about 444 light years, it is among the nearest star clusters to Earth. It is the nearest Messier object to Earth, and is the most obvious cluster to the naked eye in the night sky.

The cluster is dominated by hot blue luminous stars that have formed within the last 100 million years. Reflection nebulae around the brightest stars were once thought to be left over material from their formation, but are now considered likely to be an unrelated dust cloud in the interstellar medium through which the stars are currently passing.This dust cloud is estimated to be moving at a speed of approximately 18 km/s relative to the stars in the cluster.

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Messier 45 position shown relative to our location (Sun) in the Milky Way Galaxy
Age: 135 million years
Galatic Longitude: 166.6
Galatic Latitude: -23.5
Distance from Galatic Plane:121 ly below the galatic plane

Above image and info provided by Our Galaxy 3D Atlas application and used with permission by Otherwise
Post processed 6-panel luminance data used for the base.
Post processed 6-panel luminance data with stars removed to show the dust structure