M 93
About image
M 93 is an open cluster in Puppis constellation, at an estimated distance of 3600 light years.
It is quite bright with its magnitude of 6.2, so at the limit of visibility with naked eye: but for the northern observer it is always very low on the horizon, due to its declination of -24°.
It includes about 80 stars, the brightest ones with magnitude around 8.2: most of them are blue giants, but due to the strong absorption of the interstellar dust they appears more white rather than blue.
Technical data
Optic Astrograph Newton Artec 200 E - Aperture 200mm, focal lenght 912mm, f/4.5
Mount Skywatcher EQ6R
Camera ZWO ASI 294MM Pro with external filter wheel 7 positions
Filters Antlia 36mm RGB
Guiding system Artesky Ultraguide 60 MKII
Exposure details R 19x120" bin2 -15C gain 0
G 19x120" bin2 -15C gain 0
B 19x120" bin2 -15C gain 0
Total integration 1h54'
Acquisition Voyager, PHD2
Processing Pixinsight 1.8, Photoshop CS5, NoiseXTerminator, BlurXTerminator
SQM-L 21,1
Location Promiod (Aosta Valley, Italy)
Date 10 November 2024
© Roberto Marinoni 2019 - All rights reserved