Friday, August 09, 2019

doubles for August 2019

Sent out my double star "bulletin" for August 2019. It is a short list of suggested targets. I shared this on the RASC Toronto Centre forums. And I post here for all.


The Moon’s getting bright again. Don’t despair; do doubles.

For August 2019, here’s a short selection of double and multi-star systems from my life list for your observing campaign. They are all pretty easy.

staralso known asalternate catalogue(s)
θ (theta) LyrSh 292 and 21 LyrSAO 68065, HIP 94713
OΣ525 LyrSTT 525 (Otto Struve) or SHJ 282SAO 67566, HIP 92833
Σ2470 LyrSTF 2470 or HD 178849SAO 67870, HIP 94043
54 SgrHJ 599 SAO 162883, HIP 96808
HD 174005 SctSTF 2391 SAO 142640, HIP 92296

An interesting quality of double stars is their resistance to the ever encroaching infiltration of light pollution. So, have a go. See if you can split them and detect colour. How different are they in brightness? Please share your discoveries.

Be seeing you.

Blake Nancarrow
astronomy at computer-ease dot com

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