Celestial hemisphere:  Southern  ·  Constellation: Sagittarius (Sgr)  ·  Contains:  B304  ·  B307  ·  B92  ·  B93  ·  IC 4715  ·  LBN 51  ·  LBN 52  ·  LDN 322  ·  LDN 323  ·  LDN 327  ·  LDN 328  ·  LDN 331  ·  LDN 335  ·  LDN 336  ·  M 18  ·  M 24  ·  NGC 6567  ·  NGC 6603  ·  NGC 6613  ·  PGC 202099  ·  PGC 202315  ·  Sh2-39  ·  Sh2-40  ·  Sh2-41  ·  Sh2-43  ·  Small Sgr Star Cloud  ·  VdB117
Getting plate-solving status, please wait...
Dark Nebulae in the Sagittarius Star Cloud in HOS colors and Ha only, 



    
        

            Alexandr Zaytsev
Dark Nebulae in the Sagittarius Star Cloud in HOS colors and Ha only, 



    
        

            Alexandr Zaytsev

Dark Nebulae in the Sagittarius Star Cloud in HOS colors and Ha only

Getting plate-solving status, please wait...
Dark Nebulae in the Sagittarius Star Cloud in HOS colors and Ha only, 



    
        

            Alexandr Zaytsev
Dark Nebulae in the Sagittarius Star Cloud in HOS colors and Ha only, 



    
        

            Alexandr Zaytsev

Dark Nebulae in the Sagittarius Star Cloud in HOS colors and Ha only

Acquisition details

Dates:
Oct. 19, 2022
Frames:
31×300(2h 35′)
Integration:
2h 35′
Avg. Moon age:
23.74 days
Avg. Moon phase:
33.37%

RA center: 18h16m04s.99

DEC center: -18°1336.6

Pixel scale: 2.062 arcsec/pixel

Orientation: -90.473 degrees

Field radius: 1.529 degrees

WCS transformation: thin plate spline

More info:Open 

Resolution: 4100x3417

File size: 18.2 MB

Data source: Amateur hosting facility

Remote source: ChileScope

Description

2h 35min integral Ha, Oiii. Sii exposure of M24 all dark nebulae and star clusters within it, captured remotely using Telescope #5 (Officina Stellare Riccardi-Honders RH200 D = 200mm f/3, FLI Microline 16200) system of ChileScope observatory; over 5 observation sessions carried out on Oct 1, 16, 17, 18, 19, 2022.

The Ha, Oiii. Sii  exposures are split 3 ways:

- Ha only (revision B),
- HOS mapped to RGB photometrically calibrated using PixInsight tools,
- HSO mapped to RGB photometrically calibrated using PixInsight tools,

all processed separately and merged together for final calibration in Photoshop.


The wider angle view to the region is also available under [1]:

[1] https://www.astrobin.com/1pe41m/C/

Comments

Revisions

  • Final
    Dark Nebulae in the Sagittarius Star Cloud in HOS colors and Ha only, 



    
        

            Alexandr Zaytsev
    Original
  • Dark Nebulae in the Sagittarius Star Cloud in HOS colors and Ha only, 



    
        

            Alexandr Zaytsev
    B

B

Title: Ha version of the image (based on 10x 300s subset of exposures)

Uploaded: ...

Sky plot

Sky plot

Histogram

Dark Nebulae in the Sagittarius Star Cloud in HOS colors and Ha only, 



    
        

            Alexandr Zaytsev