Jones-Emberson 1 / 125 hours exposure (Morten Balling)

Image of the day 09/08/2013

Jones-Emberson 1 / 125 hours exposure

Image of the day 09/08/2013

Jones-Emberson 1 / 125 hours exposure

Jones-Emberson 1.

The longer the exposure, the better the image. That's a rule of thumb in astrophotography. That gave a group of danish amateur astronomers an idea: What if, instead of working on individual images, we tried to image the same object, and combined all the data?

The object chosen was Jones-Emberson 1, a large but faint planetary nebula. During the winter of 2012 and the early spring of 2013 more than 125 hours of data was gathered by seven people using six very different telescopes.

All the data was meticulously analyzed regarding noise and sharpness, using special algorithms, and combined into a single image.

The method isn't new, but normally fewer people attend, and our project shows that the method has great potential. Especially these days, when more and more skilled astrophotographers pop up, and the internet works very well for sharing and handling data.

125 hours of exposure is a lot to most single astrophotographer, but well within reach with joint projects. It's highly rewarding, and we give the method our highest endorsement.

Jones-Emberson 1 (PK 164+31.1) is a 14th magnitude planetary nebula in the constellation Lynx at a distance of 1600 light years. The 16.8-magnitude central star is a very blue white dwarf.

A planetary nebula is an emission nebula consisting of an expanding glowing shell of ionized gas ejected from a star late in its life.

The image was made from LRGB+Ha+OIII data. It's as close to natural colors to the human eye as possible.

The project was arranged via Astro-Forum.dk, by:

Michael Stauning, Michael Rask, Torben Taustrup, Flemming R. Ovesen, Morten la Cour, Paul Christiansen and Morten Balling.

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

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

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Image of the day 09/08/2013

Jones-Emberson 1 / 125 hours exposure

Image of the day 09/08/2013

Jones-Emberson 1 / 125 hours exposure

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Image Index:

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Image of the day 09/08/2013

Jones-Emberson 1 / 125 hours exposure

Image of the day 09/08/2013

Jones-Emberson 1 / 125 hours exposure

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