M57, The Ring Nebula in HaRGB (Sergey Trudolyubov)

M57, The Ring Nebula in HaRGB

Ring Nebula (Messier 57), the iconic planetary nebula in the constellation of Lyra. The nebula was formed when the progenitor star expelled its outer layers into interstellar space forming multiple shells of ionized gas surrounding the white dwarf that remains (seen as a blue star in the center).

This image was produced using the data taken over last four years with 250mm f/4.0 Lacerta PhotoNewton and ZWO ASI183MM Pro and ZWO ASI294MM Pro cameras. To reduce the effects of atmospheric seeing and cover the wide dynamic range of the target, a series of RGB exposures with duration ranging from 5s to 180s were taken. To supplement RGB data and reveal the extended outer shells, a narrowband exposures through H-alpha filter were added to the R band data. The final RGB images are stacks of exposures with star FWHM < 3" to reduce the effect of poor seeing.

Exposure information:

R: 273x5s (ASI183MM Pro, Gain 200, bin 1x1), 182x10s (ASI294MM Pro, Gain 200, bin 1x1), 87x20s (ASI183MM Pro, Gain 200, bin 1x1), 17x90s (ASI294MM Pro, Gain 108, bin 1x1)
G: 158x5s (ASI183MM Pro, Gain 200, bin 1x1), 302x10s (ASI294MM Pro, Gain 200, bin 1x1)
B: 54x5s (ASI183MM Pro, Gain 200, bin 1x1), 195x10s (ASI294MM Pro, Gain 200, bin 1x1), 59x20s (ASI183MM/ASI294MM, Gain 200, bin 1x1), 10x180 (ASI294MM Pro, Gain 108, bin 1x1)
Ha: 24x300s (ASI294MM Pro, Gain 200, bin 1x1), 14x600s (ASI294MM Pro, Gain 200, bin 1x1)

Total exposure: 8.6 hrs

Original
E
F
Final
G
H

E

Description: Cropped version

Uploaded: ...

F

Description: Close-up view

Uploaded: ...

G

Description: Added color saturation

Uploaded: ...

H

Description: Close-up view, added color saturation

Uploaded: ...

CMOS Imagers
Fast Newtonians
ZWO ASI183/QHY183
ZWO ASI294MM Pro Images

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

	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
Artificial satellite

	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

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	...
PixInsight job	S3XO0GYCH63K8OWDNTZC26ZM048M26UB
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	18h53m35s.780
RA (top/left)	18h54m06s.717
RA (top/right)	18h53m03s.673
RA (bottom/right)	18h53m03s.510
RA (bottom/left)	18h54m06s.404

Dec (center)	+33°01′45″.49
Dec (top/left)	+33°06′40″.22
Dec (top/right)	+33°06′44″.38
Dec (bottom/right)	+32°56′50″.52
Dec (bottom/left)	+32°56′46″.19

AstroBin

AstroBin

Image Index:

Contribution Index (beta):