Hemisphere:  Southern  ·  Constellation: Aquila (Aql)
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Comet C/2020 R4 ATLAS, 


            José J. Chambó
Comet C/2020 R4 ATLAS
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Technical card

Imaging telescopes or lenses: Planewave 20 CDK

Imaging cameras: FLI PL-09000

Software: PixInsight 1.8

Dates:March 27, 2021

Frames: 1x180"

Integration: 0.1 hours

Avg. Moon age: 13.31 days

Avg. Moon phase: 97.61%

Basic astrometry details

Astrometry.net job: 4368204

RA center: 20h 1' 20"

DEC center: -3° 45' 28"

Pixel scale: 2.379 arcsec/pixel

Orientation: 357.593 degrees

Field radius: 0.598 degrees

Resolution: 1280x1280

Data source: Own remote observatory

Remote source: iTelescope


C/2020 R4 (ATLAS) @ 2021 March 27, 19:01 UT

Comet C/2020 R4 (ATLAS) on March 27, 2021, my first image of this comet after eleven failed attempts due to the storms hit Australia in March. Currently at magnitude 9 it could reach magnitude 8 by the end of April. The image shows a gasy coma of 6 arcminutes in angular size (275,000 km) with an intense green color indicating a C2 strong emission, with a sharp central condensation and an ionic tail of 5 arcminutes. The field is about 1 square degree centered in the south of the constellation Aquila.

Data and link to image:


Sky plot

Sky plot


Comet C/2020 R4 ATLAS, 


            José J. Chambó