NGC 2170 (Gary Imm)

Celestial hemisphere: Southern · Constellation: Monoceros (Mon) · Contains: LBN 1000 · LBN 993 · LBN 994 · LBN 995 · LBN 996 · LBN 997 · LBN 998 · LBN 999 · LDN 1646 · NGC 2170 · NGC 2182 · NGC 2183 · NGC 2185 · PGC 1032282 · VdB68 · VdB69 · VdB73 · VdB74

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NGC 2170

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NGC 2170

This object is a commonly imaged beautiful series of reflection and emission nebulae located only 2400 light years away in the constellation of Monoceros at a declination of -6 degrees. It is part of the giant molecular star forming cloud known as Mon R2. The object is about 15 light-years wide and is nicknamed the Angel Nebula.

The six reflection nebulae in a row just above image center are all vdB objects - from right to left, the objects are vdB 67, 68, 69, 72, 73, and 74. I believe that the largest, vdB 68 at upper right, is one of the prettiest and most unheralded nebula in the entire sky. It combines delicate shades of light blue, dark blue, purple, magenta, red and yellow with a shimmering faint curtain of nebulosity.

To my surprise, there is a lot of confusion over the object known as NGC 2170. As seen in pink circle of the annotated Astrobin mouseover here, sometimes the furthest right nebula is identified as NGC 2170. But many reference the entire larger object as NGC 2170, which is more convenient.

Although the entire sky in this region contains hints of reddish emission, the central area is the brightest emission patch (LBN 999). This reddish nebula is a wonderful compliment to the surrounding reflection nebulae. In front of this nebula are my favorite part of the image, the parallel streaks of dark nebula which are simply clouds of dust lanes seen in silhouette.

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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	7269411
PixInsight job	BKDXWE0QK3N9SSQYFEOGKSFDKYTGVFA5
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	06h09m11s.10
RA (top/left)	06h12m29s.44
RA (top/right)	06h06m00s.30
RA (bottom/right)	06h05m52s.13
RA (bottom/left)	06h12m22s.26

Dec (center)	-06°27′12″.7
Dec (top/left)	-05°44′48″.1
Dec (top/right)	-05°42′42″.2
Dec (bottom/right)	-07°09′36″.4
Dec (bottom/left)	-07°11′41″.10

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