Astrometric observations of visual binaries using 26‐inch refractor at Pulkovo Observatory during 2014–2019

Abstract

We present 18,365 astrometric observations of 290 visual binaries obtained with the 26‐inch refractor of Pulkovo Observatory during 2014–2019. The separation between components is from 1″.3 to 37″ with a median value of 4″.8. For a single observation, the mean separation error is 0″.013, and the mean position angle error is 0∘.44/ρ, where ρ is an angular distance in arcseconds. We compare the observations of sample stars with the data from the Gaia DR2 catalog and the results of the ground‐based observations performed with other telescopes.

Does ADS 9346 have a low-mass companion?

“…Our study is based on the CCD observations (77 series) obtained with the 26-inch refractor of the Pulkovo Observatory during 2003-2019 (Izmailov et al 2010(Izmailov et al , 2020, which are available online in the Pulkovo database 1 and the Strasbourg astronomical Data Center (CDS) 2 .…”

Does ADS 9346 have a low-mass companion?

“…Our study is based on CCD observations (77 series) obtained with the 26-inch refractor of the Pulkovo Observatory during 2003-2019 (Izmailov et al 2010(Izmailov et al , 2020, which are available online in the Pulkovo database 1 and the Strasbourg astronomical Data Center (CDS) 2 . The photographic observation data from 1979 to 2005 (36 plates, 11 average annual positions) obtained with the same telescope was supplemented by CCD observation results and as a first approximation reflect the orbital motion of the wide pair at this section of the orbit (Kiselev et al 2014).…”