Astrofriend's homepage

www.astrofriend.eu
Share: Twitter Reddit Facebook Gmail Gmail Email
Search Astrofriend's homepage:

Valid CSS!

All pages shall now have been validated

Info Cookies (Kakor) / GDPR

Navigation

Advertisement /
Annons:

Advertisement / Annons:

Comet
C/2022 E3 ZTF


Object : Comet, C/2022 E3 ZTF
Coordinates/Direction : -
Object size : -
Object magnitude : 5.1 at max
More to know : You can read more about the comet on Seiichi Yoshida's homepage:
http://www.aerith.net/ comet/ catalog/ 2022E3/ 2022E3.html

Star chart from 31 January 2023 and the following days, the view is North and from Stockholm, Sweden. You can download CdC and make your own star chart for your place here: CdC:

Star chart 20230131, comet C/2022 E3 ZTF, from Stockholm Sweden

Star chart in high resolution: B/W or Color, opens in a new window.


2023-02-05, Comet ZTF

Comet C/2022 E3 ZTF, 2023-02-05 from Sweden
Date : 2023-02-05
Time (UT) : 17:23 to 18:42
Mount : SkyWatcher HEQ5 controlled by Astroberry
Guide : Ekos internal guider in dithering mode, 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) : 6.8x4.5 degree before crop of 40%
Filter : none
camera : Canon 6D, controlled by Canon Connect App for Smartphone or Pad
Film/CCD : Raw
Exp. time : 15x60 second at iso1600
Image process tool : Siril, Gimp, Irfanview
Processing : cal dark, align on comet core
Weather : Clear Sky, -3 degrees Celsius, full Moon
Site : Sweden, Stockholm, Tyresta Spirudden Nature reservation. Bortle class 4
Comment : One more clear night and this time I joined company with my friend. After we had setup the equipment we had less than two hours before the clouds rolling in. I could only use 15 of the photos I took this night with a very noisy image. It wasn't only the clouds, it was full Moon this night which cause even more noise. But this was one of the last nights with the comet when it's relative bright, about magnitude 5.3. The positive thing that it was almost up in the zenith, Dec +76 degrees.

2023-02-02, Comet ZTF

Comet C/2022 E3 ZTF, 2023-02-02 from Sweden
Date : 2023-02-02
Time (UT) : 17:31 to 19:52
Mount : Tripod
Guide : -
Lens/telescope : Canon EOS 50 mm f/1.8 (f/4) with a heater band
Corrector/Barlow : -
Field (FOV) : crop
Filter : none
camera : Canon 6D, controlled by Canon Connect App for Smartphone or Pad
Film/CCD : Raw
Exp. time : 259x30 second at iso1600, of all these only 72 photos was used
Image process tool : Siril, Gimp, Irfanview
Processing : cal dark, align on comet core
Weather : Clear Sky, -8 degrees Celsius
Site : Sweden, Stockholm, Tyresta Spirudden Nature reservation. Bortle class 4
Comment : This night I did a little experiment, I only used a tripod instead of my GoTo equipment. With that I can only take short exposures and use a short focal length. The main goal was to take so many photos that I can do a time lapse video of the comet. But first is the stacked image of 71 sub photos of it. This is something you can do with most DSLR or mirror less cameras. The lens I used is a standard normal lens, a 50 mm f/1.8 Canon lens, very cheap as used. A sturdy tripod is also good to have but what ever that hold your camera stable can be used. The 30 seconds exposures I did was a bit long, better with 15 seconds. The camera battery was drained after 300 photos and the battery for the heater band was drained already after one hour, but no fog on the lens so it didn't matter this evening.

2023-01-27, Comet ZTF

Comet C/2022 E3 ZTF, 2023-01-27 from Sweden
Date : 2023-01-27
Time (UT) : 21:04 to 21:45
Mount : SkyWatcher HEQ5 controlled by Astroberry
Guide : Ekos internal guider in dithering mode, 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) : 6.8x4.5 degree
Filter : none
camera : Canon 6D, controlled by Astroberry software
Film/CCD : Raw
Exp. time : 30x60 second at iso1600
Image process tool : Siril, Gimp, Irfanview
Processing : cal dark, flat align on comet core
Weather : Clouds comes and go
Site : Sweden, Stockholm, Björnö Nature reservation. Bortle class 4
Comment : Back to the balcony, disappointed of the last nights trouble I need to practice at home. The problem is that it's so difficult to control the equipment from the Android tablet. After one more night and only using the tablet I think I now master this. The main fail was that I started the repeat function when doing polar align to early. Now I also learned how to use the smartphone to control the equipment, easier than I thought.

The photo ? Not very good weather this night, but good enough to do this important test.

2023-01-26, Comet ZTF

Comet C/2022 E3 ZTF, 2023-01-26 from Sweden
Date : 2023-01-26
Time (UT) : 22:39 to 23:41
Mount : SkyWatcher HEQ5 controlled by Astroberry
Guide : Ekos internal guider in dithering mode, QHY5 camera with 200 mm f/3.5 lens
Lens/telescope : Pentax 645 300 mm ED f/4 (medium format lens)
Corrector/Barlow : -
Filter : none
camera : Canon 6D, controlled by Astroberry software
Film/CCD : Raw
Exp. time : 53x30 second at iso1600
Image process tool : Siril, Gimp, Irfanview
Processing : cal dark, flat align on comet core
Weather : Clear sky with a 1/4 Moon
Site : Sweden, Stockholm, Björnö Nature reservation. Bortle class 4
Comment : Just one week left to its closest approach to us. We took the car out to a dark area to get better photographs. But get in a lot of trouble when I try to polar align the mount. At home at the balcony it works perfect and is easy to do. I struggled with it for 2 hours and then gave up. Align it as good I could by eye to Polaris and start Photographing. The photo is a bit crop and is almost 5 degrees wide. The tails is now very visible and goes far away from the comet's core, more than 3 degrees. The magnitude of the comet is about 5.6 this night.

2023-01-26, Comet ZTF

Comet C/2022 E3 ZTF, 2023-01-26 from Sweden
Date : 2023-01-26
Time (UT) : 21:30 to 22:19
Mount : SkyWatcher HEQ5 controlled by Astroberry
Guide : Ekos internal guider in dithering mode, 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) : 6.8x4.5 degree
Filter : none
camera : Canon 6D, controlled by Astroberry software
Film/CCD : Raw
Exp. time : 30x60 second at iso1600
Image process tool : Siril, Gimp, Irfanview
Processing : cal dark, flat align on comet core
Weather : Clear sky with a 1/4 Moon
Site : Sweden, Stockholm, Björnö Nature reservation. Bortle class 4
Comment : The other set I took this night was with twice as long exposures on each, but the total exposure is the same because I only took 30 of them. This make it easier to lift the tail above the noise from the light pollution.

2023-01-26, Comet ZTF core

Comet C/2022 E3 ZTF, 2023-01-26 from Sweden
Date : 2023-01-26
Time (UT) : 21:30 to 22:19
Comment : A zoom in at the core show how the dust part of it surrounding the inner core. The core itself is only 1 km, much smaller than a pixel on this photo, it's the dust we see. The color comes when the Sun's photons absorbs by the comets molecules and then emit it in the green wave length. Most from carbon and cyanogen.

2023-01-26, Comet ZTF tail

Comet C/2022 E3 ZTF, 2023-01-26 from Sweden
Date : 2023-01-26
Time (UT) : 21:30 to 22:19
Comment : A zoom in on the comet's tail. The tail is much weaker and is more difficult to see. With longer exposures the tail will be better but the comet moves fast relative the stars when it's close to our Earth. The mount follow the stars, not the comet. But it's possible to reprogram the motors to follow the comet's speed. I should have done that but something wrong in the software. The limit was 60 seconds exposure time, more and the comet had been blurred because of the speed. It can be seen that the tails have some interruptions, I'm not sure why but I think it comes when the comet rotates and turn different sides to the Sun.

2023-01-20, Comet ZTF

Comet C/2022 E3 ZTF, 2023-01-20 from Sweden (Click on the image and get one in full resolution in a new window)
Date : 2023-01-20
Time (UT) : 00:36 to 01:12
Mount : SkyWatcher HEQ5 controlled by Astroberry
Guide : Ekos internal guider in dithering mode, QHY5 camera with 200 mm f/3.5 lens
Lens/telescope : Pentax 645 300 mm ED f/4 (medium format lens)
Corrector/Barlow : -
Filter : none
camera : Canon 6D, controlled by Astroberry software
Film/CCD : Raw
Exp. time : 20x60 second at iso1600
Image process tool : Siril, Gimp, Irfanview
Processing : cal dark, flat align on comet core
Weather : Lot of clouds, but I could use the holes with a clear sky between
Site : Sweden, Stockholm, Hagsätra. Bortle class 9
Comment : Now the comet really shines, even if it was very lot of clouds this night I could use 20 of the 60 photos I took of the comet. The tail is big now, it can be traced over half the field of the photo, the photo is 7 degree wide. And there are two tails, the plasma tail which is the narrow long sharp one, and then there is the dust tail which is short and more diffuse. I have done some change to the optical setup and need new MasterFlat frames, now I used the old and they don't match perfect. I will correct that later when there is time.

A zoom in around the comet

Comet C/2022 E3 ZTF 2023-01-20, photo taken from Sweden
Date : 2023-01-20
Time (UT) : 00:36 to 01:12
Processing : A zoom in around the comet
Comment : With a closer look details can be seen in the tail. Now it's really time to take the car to a dark place when next clear sky happens.

2023-01-12, Comet ZTF

Comet C/2022 E3 ZTF, 2023-01-12 from Sweden
Date : 2023-01-12
Time (UT) : 02:23 to 03:58
Mount : SkyWatcher HEQ5 controlled by Astroberry
Guide : Ekos internal guider in dithering mode, QHY5 camera with 200 mm f/3.5 lens
Lens/telescope : Pentax 645 300 mm ED f/4 (medium format lens)
Corrector/Barlow : -
Filter : none
camera : Canon 6D, controlled by Astroberry software
Film/CCD : Raw
Exp. time : 49x60 second at iso1600
Image process tool : Siril, Gimp, Irfanview
Processing : cal dark, flat align on comet core
Weather : In the beginning clouds, last 45 minutes a clear sky
Site : Sweden, Stockholm, Hagsätra. Bortle class 9
Comment : The weather forecast didn't say anything about a clear sky this night. After midnight I setup the equipment and got this. The comet is brighter now and easier to find, magnitude 6.8. At December 24 it had a magnitude of 8.2, so it has increased 1.4 magnitudes in 19 nights. It will increase at least 1.5 magnitude more at the end of January.

A zoom in around the comet

Comet C/2022 E3 ZTF 2023-01-12, photo taken from Sweden
Date : 2023-01-12
Time (UT) : 02:23 to 03:58
Processing : A zoom in around the comet
Comment : This was a surprise, now the tail is much stronger and you can follow it a long way out from the comet core. If I had been at a dark place this had looked gorgeous.

2023-01-04, Third clear night

Comet C/2022 E3 ZTF, 2023-01-04 from Sweden

A hopeless case or, before processing the image

Comet C/2022 E3 ZTF, 2023-01-04 from Sweden
Date : 2023-01-04
Time (UT) : 01:47 to 03:44
Mount : SkyWatcher HEQ5 controlled by Astroberry
Guide : -
Lens/telescope : Pentax 645 300 mm ED f/4 (medium format lens)
Corrector/Barlow : -
Filter : none
camera : Canon 6D, controlled by Astroberry software
Film/CCD : Raw
Exp. time : 90x60 second at iso1600
Image process tool : Siril, Gimp, Irfanview
Processing : cal dark, flat align on comet core
Weather : clear sky
Site : Sweden, Stockholm, Hagsätra. Bortle class 9
Comment : One more night with a clear sky, but it wasn't as dark as earlier nights. To compensate for that I took much more photos to lower the noise, in total 1.5 hours exposure.

A crop around the comet

Comet C/2022 E3 ZTF 2023-01-04, photo taken from Sweden
Date : 2023-01-04
Time (UT) : 01:47 to 03:44
Processing : A 800x800 1:1 pixel crop around the comet
Comment : The last photo was taken early in the morning at 4:44. Never taken a astrophoto that late before. Four weeks later and the comet is at it's closest distance to Earth and I hope to get some nice photos of its tale then. This night the magnitude of the comet has reach 7.4. Two magnitudes brighter than the PanSTARRS comet I photographed the same night.

2022-12-28, Second clear night

Comet C/2022 E3 ZTF, 2022-12-28 from Sweden
Date : 2022-12-28
Time (UT) : 02:27 to 03:04
Mount : SkyWatcher HEQ5 controlled by Astroberry
Guide : -
Lens/telescope : Pentax 645 300 mm ED f/4 (medium format lens)
Corrector/Barlow : -
Filter : none
camera : Canon 6D, controlled by Astroberry software
Film/CCD : Raw
Exp. time : 30x60 second at iso1600
Image process tool : Siril, Fitswork, Irfanview
Processing : crop, resize, level, cal dark, bias, flat align on comet core
Weather : clear sky
Site : Sweden, Stockholm, Hagsätra. Bortle class 9
Comment : Four days later I could take more photos of the comet, still very distant and weak. Compare the two photos and see how the tail has developed, not any big difference. The exposure time is increased from 30 seconds to 60 second. I can do that when the comet is far away and doesn't move much during the exposure. It has now magnitude 7.9.

A crop around the comet

Comet C/2022 E3 ZTF
Date : 2022-12-28
Time (UT) : 02:27 to 03:04
Processing : A 800x800 1:1 pixel crop around the comet
Comment : The total exposure time is 30 minutes this time compared to 46 minutes I took before. The dust tail can be seen pointing upwards.

2022-12-24, First night with a clear sky

Comet C/2022 E3 ZTF
Date : 2022-12-24
Time (UT) : 02:45 to 04:18
Mount : SkyWatcher HEQ5 controlled by Astroberry
Guide : -
Lens/telescope : Pentax 645 300 mm ED f/4 (medium format lens)
Corrector/Barlow : -
Filter : none
camera : Canon 6D, controlled by Astroberry software
Film/CCD : Raw
Exp. time : 185x15 second at iso1600
Image process tool : Siril, Fitswork, Irfanview
Processing : crop, resize, level, cal dark, bias, flat align on comet core
Weather : clear sky
Site : Sweden, Stockholm, Hagsätra. Bortle class 9
Comment : I have waited a couple of weeks for a clear sky to take a photo of this comet. Comets are always exiting and I don't want to miss the opportunity to take a photo of a new comet. The sky from our balcony is heavily light polluted and the comet must be bright enough to overcome that. It has now the magnitude 8.2.

The balcony rail blocked the view for the guide camera so couldn't use it. I couldn't get the Siril lock on the comet either when aligning, but no big problem because the comet is so far away these days and don't move much, about 30" / hour. The distance to the comet is 1.37 AU, Astronomical Unit. The estimated length of the tail is 0.05 AU, that is 1/20 of the distance to the Sun. That is really long, it will take the light from the core of the comet almost a half minute to travel to the end of the tail. The view is about 4x6 degrees after I cropped it a bit.

A crop around the comet

Comet C/2022 E3 ZTF
Date : 2022-12-24
Time (UT) : 02:45 to 04:18
Processing : A 800x800 1:1 pixel crop around the comet
Comment : The tail can be seen as a weak line towards 1 o'clock. The comet is expected to have its peak in brightness in February 2nd when it reach about magnitude 5. Now in December it rise in Northeast which I have an open view to from our balcony. When I took the photo it was about 29 degrees above the horizon early in the morning.

Other sources of information:

Go Back to content

Go Back

Advertisement / Annons: