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Oiii and Sii Emitters

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#1 bigeastro

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Posted 21 January 2021 - 12:57 PM

Hello everyone,

 

I am looking for a list of targets that are heavy Oiii and Sii emitters.  I know about Goofy's list, but wanted to see if there are any more available.  I want to actually select a couple of targets for full the bright part of the lunar cycle that would have all three NB wavelengths.

Thanks in advance for any reply.



#2 gatsbyiv

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Posted 21 January 2021 - 01:33 PM

It mostly has to do with the type of object.  

 

Most supernova remnants are strong OIII emitters: Cygnus Veils, Jellyfish (IC443), and Thor's Helmet are good northern examples.  Some planetary nebulae are also brighter in OIII:  try the Dumbell and Helix. 

 

Among HII regions (90+% of the emission nebulae we image), OIII and SII are far fainter than H-alpha.  By sheer virtue of their total brightness, M42, North America Nebula, Lagoon Nebula, and Swan Nebula are bright in both SII and OIII, though H-alpha is even brighter.  OIII and SII are relatively bright in The Rosette and Soul Nebulae as well, though again, still a lot dimmer than H-alpha.



#3 bigeastro

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Posted 21 January 2021 - 01:38 PM

Thanks,

Thor's Helmet may win starting tonight.  My southern sky is dark without the moon.  So it is a good area for me to image anyways.   That is perfect.  The object is always a hoot to image.

Thanks   



#4 Eric Seavey

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Posted 23 January 2021 - 11:24 AM

Hello everyone,

 

I am looking for a list of targets that are heavy Oiii and Sii emitters.  I know about Goofy's list, but wanted to see if there are any more available.  I want to actually select a couple of targets for full the bright part of the lunar cycle that would have all three NB wavelengths.

Thanks in advance for any reply.

What is Goofy's list?



#5 ryanha

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Posted 23 January 2021 - 12:47 PM

What is Goofy's list?

https://www.cloudyni...owband-targets/




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