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Challenge for 5-6 inch scopes in Delphinus

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#1 John Fitzgerald

John Fitzgerald

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Posted 06 August 2019 - 08:09 PM

In Delphinus: Ho 131 (SAO106138); mags 6.97-10.6; sep 3.5 seconds; PA 331 deg (NW).  Two other, fainter (mag11-12) components at 70" and 84".

WDS says this is a physical double at about 125 ly distance.

 

 

 


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#2 rugby

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Posted 09 August 2019 - 05:00 PM

Ho 131 in Del is a notch up the difficulty scale compared to John's choices in Serpens. Even finding this pair was painstaking. Given that the moon was getting pretty high in the sky ( 7 and 8 of Aug ) I didnt do badly.

Once found I set to work on the AB pair which slowly yielded as I upped the power towards 300. About 250x showed the very faint secondary using averted vision only . On the second night the sky was getting brighter allowing only brief sitings about 50 percent of the time. I guessed the PA at over 300.

The two companions listed as following proved tantalizing. I found both but had the mags reversed. Also, I think there are more . The fainter of the two seems to be also double.  My eyes are not that good. so please would someone with a bigger aperture tell me what I am seeing.




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