Hemisphere:  Southern  ·  Constellation: Circinus (Cir)  ·  Contains:  BQ Cir  ·  CW Cir  ·  CX Cir  ·  FI Cir  ·  FL Cir  ·  The star βCir  ·  bet Cir
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Two very weak and small nebulas RCW 89 and RCW 91 plus Pismis 20 and Lynga 3, 



    
        

            Claudio Tenreiro
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Two very weak and small nebulas RCW 89 and RCW 91 plus Pismis 20 and Lynga 3

Getting plate-solving status, please wait...
Two very weak and small nebulas RCW 89 and RCW 91 plus Pismis 20 and Lynga 3, 



    
        

            Claudio Tenreiro
Powered byPixInsight

Two very weak and small nebulas RCW 89 and RCW 91 plus Pismis 20 and Lynga 3

Imaging Telescopes Or Lenses
Vixen ED80SF Refractor
Imaging Cameras
ZWO 294 MC Pro Cooled
Mounts
iOptron CEM70
Accessories
SharpStar 2" flattener
Software
SharpCap 3.2 · GIMP 2.10.22 · PH2 Guiding software · DSS 4.2.5 (64) · Pleiades Astrophoto Pixinsight 1.8 pixinsight 1.85
Guiding Telescopes Or Lenses
SVBony 60mm_f4_Guiding Scope
Guiding Cameras
ZWO 120MM Mini

Acquisition details

Dates:
May 10, 2021
Frames:
550x60" (9h 10')
Integration:
9h 10'
Avg. Moon age:
28.37 days
Avg. Moon phase:
1.52%

RA center: 15h15m03s.34

DEC center: -58°3742.5

Pixel scale: 1.587 arcsec/pixel

Orientation: -179.005 degrees

Field radius: 1.002 degrees

More info:Open 

Resolution: 3652x2700

Locations: ARTAMI Observatory at home, Curicó - Bortle 5 - 6, Maule, Chile

Data source: Backyard

Description

These are two small and weak nebulas in Circinus, the blue and bright star is beta Circinus. Close to the centre and below right is RCW 91, and also near the centre up left is RCW 89. Also it is the open cluster Pismis 20, the small quite yellow cluster right close to the top at the centre of the image. I found quite tricky the colour calibration in these full of dust areas and colourful stars, in general I try to find some reference images, normally from ESO, and using some routines in PxI for colour calibration to match a not so unbalance set of colours. The Lynga 3 open cluster is clearly visible next to the bright yellow star, to the left, above RCW 91. Additionally, close to the yellowish star at 12h12m and -58d45m it should be Loden 2045, however I am not able to identify it.

Comments

Histogram

Two very weak and small nebulas RCW 89 and RCW 91 plus Pismis 20 and Lynga 3, 



    
        

            Claudio Tenreiro