NGC4395 (lowenthalm)

Celestial hemisphere: Northern · Constellation: Canes Venatici (CVn) · Contains: HD108090 · NGC 4395 · PGC 2035635 · TYC2528-1466-1

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NGC4395

Acquisition type: Lucky imaging

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NGC4395

Acquisition type: Lucky imaging

I captured a couple of hours of data on this galaxy at a remote site in south central Oregon at the beginning of April. Its a low surface brightness galaxy, so I planned to get an additional 4 hours or so at subsequent dark sky star parties I planned to attend over the next month and half. Then it started raining, and raining, and raining. We had the wettest spring anyone can remember (yes, there was flooding in the region, including Yellowstone National Park) and it didn't stop raining until late June! So, this is all I can get for this year, as the object is now getting too low to image. It is just too low in the sky by midnight when the end of astronomical dusk arrives at this time of year in the Pacific Northwest.

This galaxy is close enough that a variety of distance measurement techniques can be used. The latest measurements as of 2016 put it at about 15.5 million light years away. Its about 15.5 arc minutes across, so that makes it roughly 70,000 light years across.

Each of the 14 images was a live-stack (using SharpCap) of 135 x 4 second exposures. Processing was in FitsWorks.

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Galaxies - big!

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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	Advanced success
Started	...
Astrometry.net job	5901505
PixInsight job	72HPH78S53G51XMVZ7D6C2SANBW2TU77
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	12h25m49s.270
RA (top/left)	12h27m06s.272
RA (top/right)	12h24m31s.918
RA (bottom/right)	12h24m32s.577
RA (bottom/left)	12h27m06s.224

Dec (center)	+33°32′47″.20
Dec (top/left)	+33°43′39″.52
Dec (top/right)	+33°43′32″.97
Dec (bottom/right)	+33°21′51″.49
Dec (bottom/left)	+33°21′57″.89

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NGC4395

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NGC4395

NGC4395

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Acquisition details

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