Hemisphere:  Northern  ·  Constellation: Taurus (Tau)  ·  Contains:  Extremely wide field
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2020 Geminid Widefield, 



    
        

            Brent Newton

2020 Geminid Widefield

Getting plate-solving status, please wait...
2020 Geminid Widefield, 



    
        

            Brent Newton

2020 Geminid Widefield

Technical card

Imaging telescopes or lenses: Rokinon 14mm F/2.8

Imaging cameras: Canon T3i, Baader Modified

Mounts: iOptron Sky Guider Pro

Software: Pixinsight

Accessory: Canon Remote control


Dates:Dec. 13, 2020

Frames:
37x30" (18' 30") ISO1600
64x90" (1h 36') ISO3200

Integration: 1h 54' 30"

Darks: 56

Flats: 20

Bias: 100

Avg. Moon age: 28.20 days

Avg. Moon phase: 1.99%

Bortle Dark-Sky Scale: 2.00


Basic astrometry details

Astrometry.net job: 4101636

RA center: 05h47m33s.4

DEC center: +22°0722

Pixel scale: 61.374 arcsec/pixel

Orientation: 62.277 degrees

Field radius: 53.632 degrees


Resolution: 4449x4448

Locations: Fall River State Park, Fall River, KS, United States

Data source: Traveller

Description

This is a composite of several exposures on the Geminids taken throughout the night. Being close to winter, Fall River State Park is basically abandoned and I saw only one other vehicle in the campground. I parked near a boat ramp and, after taking some foreground images, targeted the rising eastern constellations to capture longer exposures of the background sky at f/5.6. At about 10pm I started taking shorter exposures at f/2.8 in order to capture transient events. Despite my preparations I can say this was not fun. I had several layers on to keep warm, but the steady breeze, freezing temperatures, and the lake effect meant I was left stuffing spare batteries into my gloves, sheltering in the car, and swapping camera batteries every 20-30 minutes since the cold conditions kept reducing their charge.

Calibration & Integration:

- Image Calibration using Bias, Flats, Darks

- Subframe Weighing for background images

- Registration for 90" background images and the 30" transient images (I probably should have searched them for meteors first, but found it easier to Blink them all after aligning them. Still, this took about 3 hours to register the highest total of about 700 images)

- Image Integration of the 90" background images

Background Processing:

- Crop

- DBE

- Deconvolution targeting stars

- Photometric CC

- Magenta Star Script (applied using star masking)

- Jon Rista method TGVD, MMT

- ASH + Masked Stretch

- ACDNR for final NR

- Curves, Saturation edits

- Exported as a TIFF to Photoshop

Meteor Processing:

- Image Container / Process Container to automate much of the following

- Image Calibration

- Crop to match 90" background

- DBE for each image

- Color Calibration

- TIFF Export

Photoshop Combination:

- Masked in each transient to the background image

- Levels, Saturation edits

Annotation image:

- Addition of constellation lines in Photoshop since Pix was unable to solve

- Blending in of Foreground images taken in dusk twilight + one single tracked image of the background for reference (moved slightly South/right but hey, its a comp)

Comments

Revisions

    2020 Geminid Widefield, 



    
        

            Brent Newton
    Original
  • Final
    2020 Geminid Widefield, 



    
        

            Brent Newton
    B

B

Description: Artistic composite using Foreground + Annotation

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Sky plot

Sky plot

Histogram

2020 Geminid Widefield, 



    
        

            Brent Newton

In these public groups

Central USA
Astro Landscapes