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Contains:  M 21, NGC 6531, Trifid nebula, M 20, NGC 6514, The star 4Sgr
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Mars and the Trifid (with animation)

Technical card

Resolution: 5988x3978

Dates:March 18, 2018

Frames: 113x60"

Integration: 1.9 hours

Avg. Moon age: 0.95 days

Avg. Moon phase: 1.01% job: 1971599

RA center: 18h 2' 24"

DEC center: -22° 59' 20"

Pixel scale: 1.153 arcsec/pixel

Orientation: 20.607 degrees

Field radius: 1.151

Locations: Backyard, St Petersburg, FL, United States

Data source: Backyard


This was a surprise capture. After the neighbor's light made certain I couldn't continue on my other target, I looked in my sky app to see what was coming up. I saw this was going to be happening and the Trifid would be at 14 degrees at 4:00AM, so I had a cup of coffee and imaged what I could before the sun came up.

I didn't expect the movement of Mars to be so much and it can certainly be seen here in this full image of 1 hour 53 minutes.

Revision B is a GIF showing the movement over 110 minutes. For the animation I did 11 ten minute stacks to get some detail in the area and also keep Mars somewhat round without trailing.



Jarrett Trezzo
License: None (All rights reserved)



animation of movement over 110 minutes

Sky plot

Sky plot


Mars and the Trifid (with animation), 


            Jarrett Trezzo