Thursday, May 23, 2019

dropped in on 70 Oph (Halifax)

Commanded the BGO 'bot to capture 70 Ophiuchi again, the 88-year binary star. By aiming at GSC 00434 02340, this puts Σ2272 to the bottom-right.

fast-moving binary 70 Oph in luminance

Luminance only, ½ second subexposures, 12 stacked shots. FITS Liberator, Paint.NET. North is up; east is left.

This is the third fourth year of imaging! I'll have a go at detecting the orbital motion...

Annual image log:

2016 Aug
2017 Jul
2018 May
2019 May < you are here
2020 May
2021 May
2022 Aug

I should attempt to measure the position angle in all these... Should see a change.

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