Plaskett Report for February 1927

The observing weather was considerably above the average, a total of 138 plates being secured on 12 nights as compared with an eight-year average of 115 plates on 13 nights. The actual observing time was 101.4 hours as compared with the average for the month of 81.0. We were, moreover, fortunate in resilvering the mirror just prior to the return of good observing weather thereby deriving the maximum observational results.

Director J. S. Plaskett obtained 23 spectrograms on 3 nights. Measured and reduced wave lengths of all the lines in υ Sagittarii about 300 in number on 5 plates. Completed orbit and least-squares correction of HD 193536. Handled the usual correspondence and administrative work.

Assistant Director W. E. Harper worked 3 nights obtaining 65 spectrograms. Measured 56 for radial velocity. Assisted in silvering the mirror. Reading up on ionization work. Gave two papers. Some work on the period of binaries.

Research Astronomer H. H. Plaskett worked parts of two nights securing 3 long-exposure spectra and 1 short-exposure spectrum. Discussion on peculiar star Z Andromedae completely re-written. Prepared and gave a lecture before RASC on the Nebulae; also prepared and gave an observatory talk on problems presented by planetaries. Assisted in silvering the mirror.

Wed, Feb 23, 1927 – 10 · Times Colonist (Victoria, British Columbia, Canada) ·

Assistant Astronomer J. A. Pearce observed on 4 nights, obtaining 46 spectrograms. Measured 31 spectrograms for radial velocity. Considerable time on the radial velocity catalogue of classes O and B stars. Prepared 1 address for the Observatory Journal Club.

Astronomical Computer S. N. Hill measured and reduced for radial velocity 18 B-type spectrograms. Working on the period of binary HD 32990. Work in connection with the library, Computing wave lengths of υ Sgr. Work on B-type card index.

Senior Clerk Typist Miss H. R. Keay handled the usual accounts, correspondence, reports and plates. Read page proof of Volume III, Numbers 15, 16 and 17. Miscellaneous typing.

Instrument Maker Foreman T. T. Hutchison assisted in observing 9 ½ nights. Helped in silvering the mirror and lept telescope in running order.