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Two challenge doubles in Lyra for 5" to 6" class scopes

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#1 John Fitzgerald

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Posted 09 October 2019 - 06:25 PM

Dawes 9, SAO 48054  magnitudes 7.1, 10.2 separation 2.0"  PA 172 deg.

 

STT 525 magnitudes 6.1,9.1 separation 1.8" PA 130.  There is a third star magnitude 7.6, 45.4" away at 350 deg.

 

 



#2 fred1871

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Posted 10 October 2019 - 12:19 AM

STT 525 located at 18 54.9, +33 58 (J2000)

 

DA 9 located at 19 04.3, +43 53 (J2000).

 

John, have you tried these yet? For me they're too far North, remaining in the poor seeing at low altitude from my Southerly latitude. I'd expect them to show with 14cm, based on having split pairs with very similar magnitudes and separations that rise higher in my sky, using that aperture.



#3 John Fitzgerald

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Posted 10 October 2019 - 08:32 AM

Yes, I have. I observed them several years ago, and again this week.


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