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Comet
C/2019 L3 Atlas


Object : Comet, C/2019 L3 Atlas
Coordinates/Direction : -
Object size : -
Object magnitude : -
More to know : You can read more about the comet on Seiichi Yoshida's homepage:
http://www.aerith.net/ comet/ catalog/ 2019L3/ 2019L3.html

2022-03-04, L3 Atlas

Comet C/2019 L3 Atlas
Date : 2022-03-04
Time (UT) : 22:07 to 22:28
Magnitude : 9.9
Mount : SkyWatcher HEQ5, belt modified, low rider
Guide : QHY5 camera with 200 mm f/3.5 lens
Lens/telescope : Pentax 645 300 mm ED f/4 (medium format lens)
Corrector/Barlow : -
Field (FOV) : 6.8x4.5o (full frame) before crop
camera : Canon 6D, QE=0.5, full frame, 20 Mpixel, 14 bit
camera temperature: About 6o C above surrounding temperature
Film/CCD : Raw, Cr2
Filter : none
Control system: Mount, camera, focus, guide (Ekos) controlled by Astroberry (KStars/Ekos Linux)
Exp. time : 30*30 seconds at ISO1600
Image process tool : Siril, Fitswork, Irfanview
Weather : clear sky
Processing : Flat calibrated, dark, bias subtracted, crop 1:1
Site : Sweden, Stockholm, Hagsätra, terrace at 9t floor. Bortle 9
Free view Az: 165o-15o, La: 5o-90o
Comment : This time I'm up on the roof and taken these images. Much better but the comet has moved more far away now. The comet was very weak and the align process didn't work as it should.

2022-01-04, L3 Atlas

Comet C/2019 L3 Atlas
Date : 2022-01-04
Time (UT) : 18:51 to 19:13
Magnitude : 9.8
Mount : SkyWatcher HEQ5, belt modified, low rider
Guide : QHY5 camera with 200 mm f/3.5 lens
Lens/telescope : Pentax 645 300 mm ED f/4 (medium format lens)
Corrector/Barlow : -
Field (FOV) : 6.8x4.5o (full frame) before crop
camera : Canon 6D, QE=0.5, full frame, 20 Mpixel, 14 bit
camera temperature: About 6o C above surrounding temperature
Film/CCD : Raw, Cr2
Filter : none
Control system: Mount, camera, focus, guide (Ekos) controlled by Astroberry (KStars/Ekos Linux)
Exp. time : 30*30 seconds at ISO1600
Image process tool : Siril, Fitswork
Processing : Flat calibrated, dark, bias subtracted, cropped about 50%.
Site : Sweden, Stockholm, Hagsätra. Bortle 9
Free view Az: 20o-90o, 165o-185o, La: 20o-55o
Comment : This time I did find the comet. Some parameters must have been wrong two weeks earlier. One more comet on the sky and I can see it from our balcony. A 300 mm lens is a bit short for this far away comet.

2021-12-17, L3 Atlas

Comet C/2019 L3 Atlas (Click on the image to get one in full resolution, opens in a new window)
Date : 2021-12-17
Time (UT) : 21:17 to 21:43
Magnitude : 9.9
Mount : SkyWatcher HEQ5, belt modified, low rider
Guide : QHY5 camera with 200 mm f/3.5 lens
Lens/telescope : Pentax 645 300 mm ED f/4 (medium format lens)
Corrector/Barlow : -
Field (FOV) : 6.8x4.5o (full frame) before crop
camera : Canon 6D, QE=0.5, full frame, 20 Mpixel, 14 bit
camera temperature: About 6o C above surrounding temperature
Film/CCD : Raw, Cr2
Filter : none
Control system: Mount, camera, focus, guide (Ekos) controlled by Astroberry (KStars/Ekos Linux)
Exp. time : 31*30 seconds at ISO1600
Image process tool : Siril, Fitswork
Processing : Flat calibrated, dark, bias subtracted, cropped about 50%.
Site : Sweden, Stockholm, Hagsätra. Bortle 9
Free view Az: 20o-90o, 165o-185o, La: 20o-55o
Comment : The days before Christmas I had the a comet visible from our balcony. Can you find it on the photo because I can't. Have to do an investigating. Even if magnitude 9.9 is weak in a light polluted are like this it should be possible to see it.

Sky Chart and Plate solving

Comet C/2019 L3 Atlas (Click on the image to get one in full resolution, opens in a new window)

With some help from SkyChart (CdC) to get where the comet is.

Comet C/2019 L3 Atlas (Click on the image to get one in full resolution, opens in a new window)

A plate solving identify the objects on the photo, done on the Astrometry homepage..

Comet C/2019 L3 Atlas

When I compare the Sky chart where the comet is and the plate solve where the photo is taken I see that I missed the comet by 8 degrees. Some mistake done this night.

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