LDN 1251 - CHEPEUS CONSTELLATION - NASA APOD 24 NOVEMBER 2022 - THIRD PRIZE ON OPTOLONG CONTEST 2022 (Stefano Attalienti)

Celestial hemisphere: Northern · Constellation: Cepheus (Cep) · Contains: HD212955 · HD213021 · HD214710 · HD215038 · LBN 558 · LDN 1251

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LDN 1251 - CHEPEUS CONSTELLATION - NASA APOD 24 NOVEMBER 2022 - THIRD PRIZE ON OPTOLONG CONTEST 2022

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LDN 1251 - CHEPEUS CONSTELLATION - NASA APOD 24 NOVEMBER 2022 - THIRD PRIZE ON OPTOLONG CONTEST 2022

LDN 1251, is a molecular cloud that is part of the vast molecular cloud of Cepheus. About 1000 light-years away from the solar system, its clouds reach temperatures close to absolute zero, making it one of the coldest objects in the cosmos.
LDN 1251 is an east-west elongated cloud on the eastern edge of the complex; its comet shape suggests that it is interacting with the large superbubble caused by the supernova explosion. Its distance from us has been determined in various ways and the cloud has been mapped to different emission lines, such as 13CO, SiO, NH3, HCN and more. By studying the population of young stellar objects, some authors found a dozen Hα stars and a source of infrared radiation, from which emerges an optical jet, classified as HH 149. There are also two sources of thermal radio waves.

The refractors!
CMOS Imagers
Cloudy Nights
Constructive Critique Requested
Imagers of Italy

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	Distinct awarded users	Total awarded images
Image of the day
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	Image of the day	Top pick	Top pick nominations	Total submitted
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	Image of the day	Top pick	Top pick nominations	Total submitted
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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	7044560
PixInsight job	UON3EVCB97G1V4JXKZF26EVCGFCIH6VA
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	22h27m56s.20
RA (top/left)	22h42m03s.37
RA (top/right)	22h10m28s.90
RA (bottom/right)	22h15m14s.36
RA (bottom/left)	22h44m20s.76

Dec (center)	+75°10′31″.6
Dec (top/left)	+75°57′47″.9
Dec (top/right)	+75°36′08″.4
Dec (bottom/right)	+74°20′22″.9
Dec (bottom/left)	+74°40′14″.4

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LDN 1251 - CHEPEUS CONSTELLATION - NASA APOD 24 NOVEMBER 2022 - THIRD PRIZE ON OPTOLONG CONTEST 2022

LDN 1251 - CHEPEUS CONSTELLATION - NASA APOD 24 NOVEMBER 2022 - THIRD PRIZE ON OPTOLONG CONTEST 2022

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LDN 1251 - CHEPEUS CONSTELLATION - NASA APOD 24 NOVEMBER 2022 - THIRD PRIZE ON OPTOLONG CONTEST 2022

LDN 1251 - CHEPEUS CONSTELLATION - NASA APOD 24 NOVEMBER 2022 - THIRD PRIZE ON OPTOLONG CONTEST 2022

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