Cookie consent

AstroBin saves small pieces of text information (cookies) on your device in order to deliver better content and for statistical purposes. You can disable the usage of cookies by changing the settings of your browser. By browsing AstroBin without changing the browser settings, you grant us permission to store that information on your device.

I agree
Contains:  NGC 3324
Getting plate-solving status, please wait...
Gabriel Mistral, 


            Bruce Rohrlach
Gabriel Mistral

Gabriel Mistral

Technical card

Resolution: 1949x1599

Dates:April 20, 2019

ZWO Ha 36mm: 60x60" -20C bin 1x1
ZWO OIII 36mm: 60x60" -20C bin 1x1

Integration: 2.0 hours

Darks: ~30

Flats: ~30

Bias: ~50

Avg. Moon age: 15.89 days

Avg. Moon phase: 98.58%

Bortle Dark-Sky Scale: 3.00 job: 2739312

RA center: 159.551 degrees

DEC center: -58.691 degrees

Pixel scale: 1.097 arcsec/pixel

Orientation: 300.495 degrees

Field radius: 0.384 degrees

Locations: Ventnor, Phillip Island, Victoria, Australia

Data source: Backyard


The Gabriela Mistral nebula (NGC 3324) on the outskirts of the Eta Carina Nebula last night from Phillip Island.

Gabriela Mistral (7,200 Light Years away) is an emission nebula with hydrogen and oxygen gas excited by an open star cluster at its centre. The nebula is colloquially named after the pseudonym name (Gabriela Mistral) used by the Chilean poet-diplomat, educator and humanist - Lucila Godoy Alcayaga. Some central themes in her poems are nature, betrayal, love, a mother's love, sorrow and recovery, travel, and Latin American identity as formed from a mixture of Native American and European influences. Her portrait also appears on the 5,000 Chilean peso bank note (Wikipedia). Her face is seen as a profile in the nebula looking almost downward towards the right.

Gas and dust in NGC 3324 fueled a burst of starbirth millions of years ago and created several extremely hot and massive stars. The intense ultraviolet radiation from these hot young stars causes the gas cloud to glow and has carved out a cavity in the surrounding gas and dust as the stars slowly erode the gas cloud away.

Skywatcher 8 inch/f5. ASI1600mm Pro (unguided).

HOO mapped to RGB.
Hydrogen alpha filter = Red
Oxygen III filter = Green
Oxygen III filter = Blue

60 x 1 minute (Ha), -20 Celcius CMOS chip Temp, Bin 1x1.
60 x 1 minute (OIII), -20 Celcius CMOS chip Temp, Bin 1x1.
Calibrations: Bias (50), Darks (30), Ha and OIII Flats (30 each).

I was hoping for 6 hours of data (2 hours each of Ha, OIII and SII) but the clouds rolled in and cut my imaging session short at around 11pm, so running with a HOO version for now until I get another clear night.



Bruce Rohrlach
License: None (All rights reserved)

Sky plot

Sky plot


Gabriel Mistral, 


            Bruce Rohrlach