Orion Nebula (M42) from Hong Kong-the most light polluted city (Ho Ming)

Celestial hemisphere: Southern · Constellation: Orion (Ori) · Contains: Great Nebula in Orion · M 42 · M 43 · NGC 1973 · NGC 1975 · NGC 1976 · NGC 1977 · NGC 1980 · NGC 1981 · NGC 1982 · The star 42Ori · The star 45Ori · The star θ1Ori · The star θ2Ori · The star ιOri

Orion Nebula (M42) from Hong Kong-the most light polluted city, Ho Ming

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Orion Nebula (M42) from Hong Kong-the most light polluted city

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Orion Nebula (M42) from Hong Kong-the most light polluted city

I was surprised and thankful by the details I could acquire and pull from the infamous light polluted city--pearl of Asia--Hong Kong.

Believe or not, there is no night here, everything is shone by the city light. The density of street light is so high that the closest street lamp is 10 meter away from the observatory (Bortle Class 8-9, wish to get a darker site in the suburb area!). Weather is also unstable here. Even it is sunny, the sky is filled with local and trans-border pollutants and smog. Clear skies? like 12-15 a year, and most of them are occupied by the moon.

Because of such constraints, we fight our best to get hold of any chances.

It is the first time I used this 20-year-old-Vixen SXD mount. Tracking is not accurate. No guide scope is used. Exposure time of each frame is 15 seconds. I acquired 300 of it, and dumped 9. 100 Dark frames were used to do the calibration. No flat or bias frames here.

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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	3006393
PixInsight job	n/a
PixInsight queue size	n/a
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Orion Nebula (M42) from Hong Kong-the most light polluted city

Orion Nebula (M42) from Hong Kong-the most light polluted city

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Orion Nebula (M42) from Hong Kong-the most light polluted city

Orion Nebula (M42) from Hong Kong-the most light polluted city

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