M13 (Jeff Marston)

Celestial hemisphere: Northern · Constellation: Hercules (Her) · Contains: Hercules Globular Cluster · M 13 · NGC 6205 · NGC 6207

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M13

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M13

I imaged M13 as kind of an after thought. I had spent a few hours on M51, and I wanted to see how my newest scope would do on another target. I tried a few images at 3 minutes, 2 minutes, and 1 minute. The first two images looked blown out so I went with 1 minute. I took 60 images and picked the best 20. Auto guiding was kind of hit and miss with this target so I pick 20 images with the tightest stars.

I have imaged M13 more times than I can count. It is a great object to take photos for beginners and I thought other targets would be just as simple. Going for faint galaxies later on let me know that there are a whole bunch of worthy targets that take a lot more effort to image. M13 is still one of my favorite objects to see through eyepieces and It looks really good through my 14 inch scope, but a good photo makes it a lot better.

I used my Istar Phantom 140mm f/6.5 scope. I just got it this spring and I really hadn’t had a chance to see what it could do. I used my Sony A7RIII on aps-c mode with a field flattener. So far the scope is impressing me. The fast focal ratio creates some spherical aberration away from center but my field flattener pretty much fixed that issue. So far so good!!!

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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	Basic success
Started	...
Astrometry.net job	5713573
PixInsight job	n/a
PixInsight queue size	n/a
PixInsight stage	n/a

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