Comet C/2023 A3 (Tsuchinshan-ATLAS) in Virgo (Scott Fisher)

Celestial hemisphere: Southern · Constellation: Virgo (Vir) · Contains: HD113984 · HD114258 · HD114360 · HD114464 · IC 850 · NGC 4996

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Comet C/2023 A3 (Tsuchinshan-ATLAS) in Virgo

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Comet C/2023 A3 (Tsuchinshan-ATLAS) in Virgo

Comet C/2023 A3 (Tsuchinshan-ATLAS) in Virgo

Svbony 550 122mm with field flattener - FL683
Canon T5i - not modified for astrophotography; CLS filter
AVX, ZWO 30F4, ASI 120mini
60X90sec subs @ ISO 800 for the comet; 100X90sec subs, for 2.5hrs imaging plus calibration frames

ATP, PHD2, SIRIL, Photoshop

I love comets. They are always in motion across the sky and they are very challenging to image and process. I had a meridian flip during the capture of this data. I was able to process the background sky from all my subs, however, I struggled to process all 100subs for the comet despite separating the data into two sets, pre and post flip. So the comet is only produced from data to the point of the meridian flip. Despite this, I did manage a pretty decent tail on the comet.

From Wiki:
C/2023 A3 (Tsuchinshan–ATLAS) is an inbound comet from the Oort cloud discovered by the Purple Mountain Observatory on 9 January 2023 and independently found by ATLAS South Africa on 22 February 2023. The comet will pass perihelion at a distance of 0.39 AU on 27 September 2024, when it could become visible to the naked eye.

Orbital period: millions of years (inbound); possible ejection (outbound)

Perihelion: 0.3914 AU (58.6 million km)

Please note: The following tables are updated every 24 hours.

Distribution of astrophotographers

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	Distinct awarded users	Total awarded images
Image of the day
Top picks
Top pick nominations

Distribution of subject types

This table shows the distribution of awards per subject type, compared to the popularity of images of that subject type.
	Image of the day	Top pick	Top pick nominations	Total submitted
Deep sky
Solar system
Extremely wide field
Star trails
Northern lights
Noctilucent clouds
Landscape

Distribution of data sources

This table shows the distribution of awards per data source, compared to the popularity of images acquired from that data source.
	Image of the day	Top pick	Top pick nominations	Total submitted
Backyard
Traveller
Own remote observatory
Amateur hosting facility
Public amaeteur data
Professional, scientific grade data
Mix of multiple sources
Other
Unknown

The “AstroBin Image of the Day and Top Picks”, or IOTD/TP, is a long-running system to promote beautiful, interesting, peculiar, or otherwise amazing astrophotographs, with a focus on technical excellence. Learn more.

Submitted The date and time when you submitted this image for IOTD/TP consideration.	...
Views by Submitters (available since September 19th, 2023) Every image is assigned to 50% of available Submitters. In the event that at least 80% of them don't view the image before its time in the IOTD/TP process expires, it's assigned to the other 50% of Submitters and the process begins anew.
Promotions by Submitters When 3 distinct Submitters promote the image, it moves on to the next stage of the process: evaluation for Top Pick status. This requirement, in addition to anonymization of images and distribution to only a subset of them, prevents biases and ensures that the best images are selected.
Promotions by Reviewers When 3 distinct Reviewers promote the image, it moves on to the next stage of the process: evaluation for IOTD status.
Early dismissal Staff members have a lot of images to inspect on a daily basis, and they can dismiss images if they believe they don't meet the requirements for IOTD/TP selection. If an image is dismissed 5 times, it's removed from the process. This streamlines the process and ensures that any bias present in promotions could be overruled by other staff members.

Status	Advanced success
Started	...
Astrometry.net job	9846881
PixInsight job	LZRL9ABEJ799MWS5RP84ZUF2XPW9MTO5
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	13h08m40s.97
RA (top/left)	13h05m57s.92
RA (top/right)	13h06m24s.22
RA (bottom/right)	13h11m24s.27
RA (bottom/left)	13h10m57s.82

Dec (center)	-00°02′36″.6
Dec (top/left)	+00°51′22″.1
Dec (top/right)	-01°01′00″.10
Dec (bottom/right)	-00°56′37″.6
Dec (bottom/left)	+00°55′45″.6

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Comet C/2023 A3 (Tsuchinshan-ATLAS) in Virgo

Comet C/2023 A3 (Tsuchinshan-ATLAS) in Virgo

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Comet C/2023 A3 (Tsuchinshan-ATLAS) in Virgo

Comet C/2023 A3 (Tsuchinshan-ATLAS) in Virgo

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