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Old 02-10-2023, 09:48 PM
Dennis
Dazzled by the Cosmos.

Dennis is offline
 
Join Date: May 2005
Location: Brisbane
Posts: 11,823
Saturn with 9 Moons - Mewlon 210

I managed to grab the 9 brighter moons of Saturn last night from our back garden in Brisbane with my Tak Mewlon 210 F11.5, Tak x1.6 Extender and ASI2600MM Pro camera.

To cater for the varying brightness levels, I grabbed a series of test exposures ranging from 01 sec to 30 secs and used the following data sets to generate the final composite image using Layers In PS CC to blend the 3 sets of images together.

05 secs x 30 frames 11:00pm to 11:04pm AEST (UT+10).
15 secs x 30 frames 11:11pm to 11:20pm AEST(UT+10).
02 secs x21 frames 11:28pm to 11:30pm AEST(UT+10).

The timing was critical as Mimas was moving away from the bright disc whereas Enceladus was gradually being swamped by the bright rings.

SkyTools 4 Imaging provides the following details for 11:15pm AEST (UT+10).

Saturn at Magnitude: 0.54

Satellites:
Name Mag PA° Sep"
Mimas 13.0 271.9 27.5
Enceladus 11.8 100.6 33.4
Tethys 10.3 275.0 44.6
Dione 10.5 91.5 53.2
Rhea 9.8 269.6 69.4
Titan 8.4 118.5 79.0
Hyperion 14.3 287.0 128.9
Iapetus 11.2 100.9 65.1
Phoebe 16.6 240.1 600.3

The image of Saturn was taken with my ASI662MC and blended in over the blown out Saturn.

The image of the inner moons is a full res crop and the wider view has been resampled down to fit in Phoebe, some way away from the planet.

Dennis
Attached Thumbnails
Click for full-size image (Saturn 02 05 15 secs layers FR Crop 1280.jpg)
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Click for full-size image (Saturn 9 Moons Crop 1280.jpg)
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Click for full-size image (ST4 Screen Capture.jpg)
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Click for full-size image (Sat_210703_290923_ZWO ASI662MC_Gain410_Exp15ms_Rx10.jpg)
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