M27 Annotated (Vitali)

Celestial hemisphere: Northern · Constellation: Vulpecula (Vul) · Contains: Dumbbell Nebula · M 27 · NGC 6853 · PGC 2815775 · PK060-03.1

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M27 Annotated

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M27 Annotated

The objects in the field around the nebula have been labeled using PixInsight's AnnotateImage script with a custom catalog built from SIMBAD Astronomical Database.

The tiny galaxy on the right (2MASX J19590947+2243239) is about 400 millions years away. Given its apparent diameter of about 8 arcsec, it is 16 thousand light years across.

SIMBAD lists another galaxy LEDA 2815775 (lower left corner of the image), but there seems to be nothing there. I also could not find any traces of the galaxy in DSS and PanSTARR images (Aladin Lite).

The two high proper-motion stars on the left (HD 345463 and HD 345464) have visibly moved from their marked J2000 positions.

There are also a couple of red giants and variable stars.

Some magnitudes (for example 13.0K) are given for the infrared K filter (2220nm), because SIMBAD data did not have the visual magnitude.

The image processing included only essential operations. Color calibration was done with the PhotometricColorCalibration process.

Voyager worked flawlessly, as always, automatically gathering the data.

Regards,

Vitali

Original
B
Final
C

B

Description: Latest PixInsight workflow. PhotometricColorCalibration.

Uploaded: ...

C

Description: This is a result of a more careful application of BackgroundNeutralization and PhotometricColorCalibration (using G2V star as a white reference) in PixInsight. I've used multiple small previews and PreviewAggregator script to get a larger background reference. Apparently the emission lines of the nebula should produce a blue-green color (see Figure 6). So I guess that this revision has more natural colors than the previous revision.

Uploaded: ...

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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	4130683
PixInsight job	3IW97TDU19GNYL5N71M8H4REXRNHM2HE
PixInsight queue size	n/a
PixInsight stage	n/a

RA (center)	19h59m36s.259
RA (top/left)	20h00m36s.158
RA (top/right)	19h58m36s.310
RA (bottom/right)	19h58m36s.442
RA (bottom/left)	20h00m36s.103

Dec (center)	+22°43′36″.53
Dec (top/left)	+22°52′24″.86
Dec (top/right)	+22°52′24″.59
Dec (bottom/right)	+22°34′46″.67
Dec (bottom/left)	+22°34′46″.97

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M27 Annotated

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M27 Annotated

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