Comet C/2020 F3 (NEOWISE), July 13th, 2020
Move your mouse over the image above (on smartphones or tablets: touch it) to get an inverted greyscale version.
I used 60 frames of the timelapse
video (YouTube link) of Comet C/2020 F3 (NEOWISE) to create a still
image showing some structure in both the yellow-white dust and the blue
plasma tail. It is not easy to work out structure in the tails of NEOWISE,
since it is most of the time low in the sky and the background is usually
bright, but it is still possible with unsharp masking, although the result
is quite noisy.
- Instrument: 4.9" f/3.8 Wright-Newtonian
- F/stop: 3.8
- Exposure: 60 x 10s
- Camera: ZWO ASI294MC Pro
- Exposure start: 2:32 MESZ
- Date: July 13, 2020
- Location: Niederleis, Lower Austria
- Conditions: Visual limiting magnitude 5 mag, SQM-L sky brightness 20.0 mag/arcsec2, seeing ?, no wind, low humidity, 10°C
- Enhancement: Basic data reduction, non-linearization, local contrast enhancement, registration and combination, background flattening, stars-background separation, noise reduction, re-adding of the stars
- Notes: Unguided exposures, the images were registered in post-processing on the comet's brightest spot. The comet was low near the northern horizon.