LDN1235 (Sebastiano Recupero)

Celestial hemisphere: Northern · Constellation: Cepheus (Cep) · Contains: The star 16Cep · The star 24Cep

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LDN1235

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LDN1235

LDN 1235 is a molecular cloud in the Cepheus constellation, likely an extended red emission nebula (ERE), that outshines through photoluminescence when dust particles are hit by high-energy UV radiation. Within its border, there are two reflection nebulae, vdB149 e vdB150 (van den Bergh catalog), respectively illuminated by the stars BD+72 1018 and HD 210806, both with a spectral type B8IV, which give the surrounding gas and dust a markedly bluish color. In the field two small galaxies are also visible, PGC67671 and PGC67347, that appear yellowish because their light, crossing the gas and dust along the line of sight, loses part of its spectrum.

Telescope: FSQ-106EDX3 @f/3.6

Camera: QSI 683 wsg8

Filters: Astrodon Gen2 Tru-Balance LRGB

Mount: Paramount MyT

Integration: L:R:G:B —> 50:11:12:7 x 600s, total: 13h 30m

Data acquired in 4 nights:

31 agosto 2016, from Nebrodi mountains

1-2-3 settembre 2016, from Margio Salice, Nebrodi mountains

Software: TheSkyX, FocusMax, PHD2, Voyager, PixInsight.

Imagers of Italy

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	Distinct awarded users	Total awarded images
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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
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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
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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	3251982
PixInsight job	n/a
PixInsight queue size	n/a
PixInsight stage	n/a

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