Wednesday, 19 April 2023

M88 & M91

It has been a very windy day today, bright and clear but very windy, I wasn't hopeful looking at the weather app today for anything useful tonight. However image capture started at around 21.15 tonight with just a little wind and possibly the odd swirl inside the dome as guiding tonight is around and just under 1.00 arc second, happy with that of course but higher than the usual numbers. Looking at the subs appear every 5 minutes on the tablet, each one battered with satellites. At least I don't have to bin the subs anymore I wouldn't have anything after the first hour.

3 Hour RGB integration


Annotated


Inverted



M88 Crop 24 by 17 arc minutes


M88 Inverted

M91 Crop 19 by 18 arc minutes

M91 Inverted


NGC 4571 Crop 15 by 13 arc minutes

  • Total Exposure:  3 Hours, 12 x 5 Minutes RGB Filters per filter
  • Telescope: Altair Astro EDT130 Triplet.
  • Image Acquisition: ZWO ASIair Pro
  • Camera Settings:  ZWO ASI2600mm pro Gain 100, 0°C
  • Accessories: ZWO 7 position Filter wheel
    •                Optolong Broadband filters 
    •                ZWO EAF
  • Calibration Frames: Darks, Flats calibrated.
  • Stacking and Processing: Pixinsight & touch ups in Photoshop. 
  • Size:   1d 47' 22.2" x 1d 11' 18.0"
  • Pixel Scale: 1.046 arcsec/pixel



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