Plaskett Report for December 1927

Observing weather continued poor for the month but a few fair nights were obtained. All told, 32 plates were secured on 9 nights as against an eight-year average of 78 plates on 10 nights. On several other nights the dome was opened but no satisfactory plates secured. Considering the year as a whole it was about 18 per cent below below the average for observing.

[December’s bad weather prevented observations of a ‘strange comet’, Ed.]

Fri, Dec 23, 1927 – 7 · Times Colonist (Victoria, British Columbia, Canada) ·

Director J. S. Plaskett obtained 21 spectrograms on 3 nights. Measured 6 spectrograms for radial velocity and 10 for density. Prepared orbit of HD 193536 and note on the temperature of υ Sagittarii for publication. Handled the usual administrative work and correspondence.

[Plaskett was selected as First vice-president of the newly formed Toronto Alumnae Association, Ed.]

Tue, Dec 13, 1927 – 5 · Times Colonist (Victoria, British Columbia, Canada) ·

Assistant Director W. E. Harper obtained 15 plates on 2 nights. Measured for radial velocity 19 spectra. Continued investigations of A-type stars for absolute magnitude. One talk before Observatory Club.

Research Astronomer H. H. Plaskett observed on parts of 2 nights obtaining 2 plates. Computations for and preparation of MSS. of a paper on Z Andromedae.

Astronomer J. A. Pearce observed on 3 nights obtaining 14 plates. Competed paper containing two double-lined binaries.

Astronomer C. S. Beals continued the analysis of the silver bands λ 3371 and λ3376 and started the preparation of a paper on the characteristics of these bands. Gave one Seminar talk on “Zeeman Effect”

Astronomical Computer S. N. Hill worked on applying Struve’s formulae to determine the period of B-type binary star and computing phases. Preparing list of B-type stars from observing programs and checking same from HD CCatalogue. Work in connection with the library.

Senior Clerk-Stenographer Miss L. M. Blake handled the accounts, reports, correspondence and spectrum plates. Type MSS of papers for Volume IV of publications.; other astronomical papers for publication. Library assistance.

Instrument Maker Foreman T. T. Hutchison assisted in observing on 7 nights. Kept telescope in running condition.