Published 2022-12-01
“…We obtained spectra of several bright binary systems (<inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mi>ζ</mi></semantics></math></inline-formula>02 UMa, 2 Lac, and <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mi>ϕ</mi></semantics></math></inline-formula>
Aql), which were mostly observed with photographic plates and whose orbits were not determined very accurately. …”
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