Sunday, September 19, 2021

posted Sep '21 doubles list

Prepared my double star "bulletin." It is a short list of suggested targets. I shared this on the RASC Toronto Centre forum. I post here for all.


School's back in, sorta. Summer's over, sorta. One thing for sure: the Moon is back, big and bright. And that means you need to shift to planets, variables, and double stars.

Here's a short selection of doubles and multi-star systems from my life list, ones I find impressive and interesting.

staralso known asalternate catalogue(s)
β CapΣA52, Dabih, 9 CapSAO 163481, HIP 100345
ε EquΣ2737, 1 EquSAO 126428, HIP 103569
HD 177904 AqlΣ2449SAO 124265, HIP 93822
HD 203320S 786 CygSAO 33323, HIP 105298
V402 LacHJ 1735SAO 51698, HIP 109354

Have a go. See if you can split them and detect colour. I hope you'll share your discoveries.

Blake Nancarrow
astronomy at computer-ease dot com

Notable double star designations:
Σ = F. Struve, STF
ΣA = Struve Appendix I, STFA, Σ1, ΣI
β = Burnham, BU
HJ = John Herschel

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