Plaskett Report for November 1927

Unusual poor observing weather continued throughout the month. The total observing time was 27.0 hours on 5 nights when19 plates were secured. The eight-year average is 86.7 hours with 102 plates on 12 nights.

[Snow caused problems on the road near the Observatory one night, Ed]

Sat, Nov 12, 1927 – 13 · Times Colonist (Victoria, British Columbia, Canada) ·

Director J. S. Plaskett measured spectra of υSagittaarii and 5 other stars for determination of the intensity distribution and reduced and plotted measures. CompletedM.S. of paper on galactic rotation. Worked up papers on stellar statistics for presentation. Handled the usual correspondence and administrative work.

Assistant Director W. E. Harper observed 4 nights securing 17 plates. Office time nearly all devoted to study of spectra of A types for absolute magnitude. Gave one address “Exploring Space” before Astronomical Society.

[Harper’s address was to the Victoria Chapter of the RASC. Ed.]

Fri, Nov 11, 1927 – 5 · Times Colonist (Victoria, British Columbia, Canada) ·

Research Astronomer H. H. Plaskett worked on Z Andromedae paper, writing up section on the temperature of the star. Some reading done on atomic theory and the nature of stellar atmosphere. Gave one staff talk.

Astronomer J. A. Pearce gave one staff talk on Distribution of Class B Stars. Finished orbits of the spectroscopic components of the B type star HD 176853. Prepared abstract of foregoing and also of a paper on “Graphs for obtaining the Position Angle and Distance of the Apex and the Galactic Coordinates for any star” for Yale meeting of the AAS. Spent several days on statistical work on double-lined orbits, in investigating the double gamma effect sometimes found. Results not yet completed.

Astronomer C. S. Beals observed one night, securing two plates. Measured 300 lines of band spectrum of silver. Gave one staff talk.

Astronomical Computer S. N. Hill spent time computing proper motion and position angle of proper motion vector for B type stars. Work in connection with the library. Remeasured 2 B type stars for radial velocity.

Senior Clerk-Stenographer Miss L. M. Blake handled the usual reports, accounts and correspondence; spectrum plates and envelopes for same; astronomical typing; mailing list and library work. Typed M. S. of papers for Director and Mr. Pearce.

Instrument Maker Foreman T. T. Hutchison assisted in observing on 4 nights. Cleaning measuring machines and general repairs to telescope.