Catalogue of double stars from observations made at the Royal Observatory, Greenwich, with the 28-inch refractor during the years 1893-1919 (1921)
Royal Observatory, Greenwich, Dyson, Frank Watson, 1868-1939 · London, H. M. Stationery Off. · leaf 231
" apparently separated." 0-364 I9I0 0-Z03 230-4 297 1927 Otto Struve suspected an elongation at ig8° in 1861 0-264 1928 I9I5 37-4 234-2 0-197 and at 240° in 1869. But in 1870 and 1873 it 238-4 0-189 1920 131-1 0-037 1929 appeared to him to be single. It had also appeared 0-080 0-180 192-7 I92I 1930… … observed by Otto Struve in 1861 and 1869 are J T 0-3. substantially correct. The observation by Secchi l_ Comparison of Observations with Ephemeris :— in 1855 and those by Engelmann in 1883 are not satisfied. A single queried observation of Schia- Observed. Obs.—Comp. parelli in 1887 is satisfied…
Double stars
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