Iris Nebula (Carsten Krege)

Celestial hemisphere: Northern · Constellation: Cepheus (Cep) · Contains: Iris Nebula · NGC 7023

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Iris Nebula

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Iris Nebula

Iris Nebula, stretched to make the rich dust fields more visible

36x300s
90x120s
30xFlat+Flatdark + 30x Darks for each of the two sessions

This has been taken in two nights on Dec 14, 2022 and Jan 18, 2023. It's the first picture using the ASI ZWO EAF which is indeed a neat extension of the setup.

On Dec 14 I squeezed the last few electrons out of my 10y+ old battery to get the last picture and the flats and flatdarks taken. Did you know the EQ9R Pro starts blinking when voltage falls under 10.7V? It was a bit of a pitty that in the middle of the session I had a power failure of my laptop because I didn't notice that the plug silently disconnected and I ran on the laptop's own battery. When I rebooted it I had to charge the laptop battery - at least a bit. With the temperatures at -7C and three heating straps connected to the telescope, the guide scope and the EAF, this was too much. At the end the battery didn't have enough power to slew to the parking position.

By the next session on Jan 18 I was equipped with a new 55Ah battery for my setup and the old battery now feeds the laptop which seems to be more tolerant to low voltages. This time I had no issues powerwise and was very lucky that I could use exact those 5.5h after sunset without clouds. I started with the first exposure when the last cloud was gone and stopped when the first new cloud came in. For a change the "Clearoutside" app's weather forecast was 100% correct.

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

Distribution of astrophotographers

This table shows the number of distinct astrophotographers who have been assigned and IOTD/TP award compared to the total number of images awarded.
	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	Basic success
Started	...
Astrometry.net job	6985248
PixInsight job	n/a
PixInsight queue size	n/a
PixInsight stage	n/a

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Iris Nebula

Iris Nebula

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Image Index:

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Iris Nebula

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