The Sunflower Galaxy (Don Curry)

Celestial hemisphere: Northern · Constellation: Canes Venatici (CVn) · Contains: M 63 · NGC 5055 · Sunflower galaxy

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The Sunflower Galaxy

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The Sunflower Galaxy

Data from additional image session from 022415 at 0700 UTC. I was able for the first time to do unguided consistent 5 to 6 minute subs without the use of an autoguider. The balance on my mount with Hyperstar attached to the primary mirror must be absolutely perfect WITHOUT mount bias heavy in either direction.

This image is combined data from 021715 that I took previously and posted. The session on 022415 was from 8 (5 to 6 minute subs unguided plus an additional 7 minute sub unguided was included in the stack as well.I was unable to continue the image run session due to abrupt huge 100 percent cloud cover. I wanted to test the limits of my unguided session by doing the additional longer sub and just barely started to see slight elongation at 150 percent enlargement.

The Ovision RA special worm gear is really living up to its name and was tested with a PEC RMS at 0.05 for a 1 worm 240 second cycle.

My dovetail bar is marked for this correction and I was off by only maybe .25 of an inch or less,but the .25 made a huge difference in stable unguided imaging.

Please click on image to see the full resolution. This galaxy will need more photons gathered during my next clear night. Even at F1.8 with my hyperstar it still needs 6 minute subs to bring out the inner detail correctly with my Canon T2i.

I will be upgrading my camera this summer to the Nikon D810A so stay tuned!!

Cloudy Nights

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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.

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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.
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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	556136
PixInsight job	n/a
PixInsight queue size	n/a
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