Celestial hemisphere:  Southern  ·  Constellation: Libra (Lib)
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How dark a near central Total Lunar Eclipse can be? Hunting for below +14m galaxies near the lunar limb (TLE of May 15/16, 2022), 



    
        

            Alexandr Zaytsev
How dark a near central Total Lunar Eclipse can be? Hunting for below +14m galaxies near the lunar limb (TLE of May 15/16, 2022), 



    
        

            Alexandr Zaytsev

How dark a near central Total Lunar Eclipse can be? Hunting for below +14m galaxies near the lunar limb (TLE of May 15/16, 2022)

Revision title: Annotated version of the original image indicating two easily detectible galaxies within 1 deg of the lunar limb

Getting plate-solving status, please wait...
How dark a near central Total Lunar Eclipse can be? Hunting for below +14m galaxies near the lunar limb (TLE of May 15/16, 2022), 



    
        

            Alexandr Zaytsev
How dark a near central Total Lunar Eclipse can be? Hunting for below +14m galaxies near the lunar limb (TLE of May 15/16, 2022), 



    
        

            Alexandr Zaytsev

How dark a near central Total Lunar Eclipse can be? Hunting for below +14m galaxies near the lunar limb (TLE of May 15/16, 2022)

Revision title: Annotated version of the original image indicating two easily detectible galaxies within 1 deg of the lunar limb

Acquisition details

Dates:
May 16, 2022
Frames:
50×122(1h 41′ 40″)
Integration:
1h 41′ 40″
Avg. Moon age:
15.14 days
Avg. Moon phase:
99.84%

RA center: 15h28m21s.63

DEC center: -18°3030.1

Pixel scale: 2.058 arcsec/pixel

Orientation: 89.897 degrees

Field radius: 0.887 degrees

WCS transformation: thin plate spline

More info:Open 

Resolution: 2222x2173

File size: 2.6 MB

Data source: Amateur hosting facility

Remote source: ChileScope

Description

Using Telescope #5 (Officina Stellare Riccardi-Honders RH200 D = 200mm f/3, FLI Microline 16200) system of ChileScope observatory for trying to lift up relatively dim (> +14m, > +16m) galaxies in the vicinity of the position of the Moon around the Total Lunar Eclipse of May 15/16, 2022 [1]. The exposure sets used costed of two data sets:
  • Dataset [D1]: 26x 180sec RGB exposures of the area a week before the TLE (May 9, 2022) - also shown under [2].
  • Dataset [D2]: 24x 60sec R exposures taken during the period of +- 20 min of the maximum phase of the TLE - stacked in an attempt to lift the galaxies in the background in the radius of 1 deg. from the lunar limb.

[1] https://eclipse.gsfc.nasa.gov/LEplot/LEplot2001/LE2022May16T.pdf



[2] https://www.astrobin.com/oqaa0a/


The summary of image revisions:
  • The original revision and revision B are using the dataset [D2] with the HDR composition with a single R 60 sec exposure frame (also shown in revision E) to show the non-overexposed featured on the lunar limb.
  • The revisions C and D are with dataset [D1] added to enhance the background features just for reference.
  • Revision F shows a 3Dplot based on a raw image revision E without any intensity transformations applied.
  • Original revision and revisions B-E are all subframes of the original exposure frame and in original resolution.


Remarkably, two rather dim galaxies are detectible on the original revision and in revision B:
  • PGC 55251 (+14.4m)
  • PGC 872828 (+16.7m)


A single image taken from all all-sky camera of the observatory site near the maximum phase of the eclipse [3] to illustrate the observational confitions (the angular altitude of the Moon at that moment is about +77 deg.):

[3] https://www.obstech.org/environment/latest_image.png

Comments

Revisions

  • How dark a near central Total Lunar Eclipse can be? Hunting for below +14m galaxies near the lunar limb (TLE of May 15/16, 2022), 



    
        

            Alexandr Zaytsev
    Original
  • Final
    How dark a near central Total Lunar Eclipse can be? Hunting for below +14m galaxies near the lunar limb (TLE of May 15/16, 2022), 



    
        

            Alexandr Zaytsev
    B
  • How dark a near central Total Lunar Eclipse can be? Hunting for below +14m galaxies near the lunar limb (TLE of May 15/16, 2022), 



    
        

            Alexandr Zaytsev
    C
  • How dark a near central Total Lunar Eclipse can be? Hunting for below +14m galaxies near the lunar limb (TLE of May 15/16, 2022), 



    
        

            Alexandr Zaytsev
    D
  • How dark a near central Total Lunar Eclipse can be? Hunting for below +14m galaxies near the lunar limb (TLE of May 15/16, 2022), 



    
        

            Alexandr Zaytsev
    E
  • How dark a near central Total Lunar Eclipse can be? Hunting for below +14m galaxies near the lunar limb (TLE of May 15/16, 2022), 



    
        

            Alexandr Zaytsev
    F

B

Title: Annotated version of the original image indicating two easily detectible galaxies within 1 deg of the lunar limb

Uploaded: ...

C

Title: Deep sky background enhanced with the image taken a week before the eclipse

Description: 26x 180s RGB exposure (1h 18min integral) with the same Chilescope T5 instrument.

Uploaded: ...

D

Title: Annotated version of Revision C indicating the same two easily detectible galaxies within 1 deg of the lunar limb

Description: 26x 180s RGB exposure (1h 18min integral) with the same Chilescope T5 instrument.

Uploaded: ...

E

Title: A subframe of a single 60 sec exposure in R taken at the maximum phase of the eclipse prepared for photometric profiling

Uploaded: ...

F

Title: Photometric profile for the Revision E of the image produced by 3Dploit tool of PixInsight

Description: The image is analyzed as it came from camera, without any intensity transformation (single 60sec R exposure subframe taken near the maximum phase of the eclipse). One specific TYC star is identified with its visual magnitude for reference.

Uploaded: ...

Sky plot

Sky plot

Histogram

How dark a near central Total Lunar Eclipse can be? Hunting for below +14m galaxies near the lunar limb (TLE of May 15/16, 2022), 



    
        

            Alexandr Zaytsev