Plaskett Report for August 1927

For the first half of the month the weather was excellent. It then became smoky, due to forest fires, and exposures had to be considerably prolonged. The result was that on 24 nights there were secured 164 plates with 186 spectra which is just about the average for the month of August for the past eight years. Both primary and secondary mirrors were resilvered in the latter part of the month.

Director J. S. Plaskett made special exposures of upsilon Sgr and stars of allied type, 12 spectra, for spectrophotometric purposes on one night. Measured 18 spectrograms for radial velocity. Compiled lists of radial velocities of B type stars and computed component due to rotation of the galaxy from the velocities of 320 B stars. Handled the usual correspondence and administrative work.

[J. S. Plaskett played in the Seniors’ Northwest Golf Tournament in August, he is listed as having a handicap of 30. He shot a round of 114 (84 handicap corrected)., Ed.]

Mon, Aug 15, 1927 – 10 · Times Colonist (Victoria, British Columbia, Canada) ·

Assistant Director W. E. Harper worked 6 nights securing 46 plates and measured for radial velocity 60. Silvered mirrors. Some work on binaries. Gave talk before Observatory Club.

[Harper gave a talk at a picnic held by the Metropolitan Brotherhood at the Oak Bay Municipal Park. Be also brought a telescope and people viewed Jupiter and Saturn, Ed.]

Sat, Aug 27, 1927 – 15 · Times Colonist (Victoria, British Columbia, Canada) ·

Research Astronomer H. H. Plaskett worked 2 nights securing 2 long exposure spectra of Z Andromedae and 2 wedge spectra of Boss 5035. Measured these plates on the Hartmann microphotometer. Worked on theory of calcium chromosphere.

Astronomer J. A. Pearce observed on 2 nights, obtaining 17 plates. Measured 36 plates for radial velocity. Worked on the orbit of HD 176853. Prepared and gave talk before staff.

Astronomical computer S. N. Hill spent time computing total proper motion and position angle of proper motion vector for B-type stars. Computing angle of pole-star-apex and plotting same. Work on binary HD 32990

Senior Clerk-Stenographer Miss L. M. Blake handled the usual correspondence, accounts, plates, reports and astronomical typing. Typed catalogue of C-stars.

Instrument Maker Foreman T. T. Hutchison assisted in observing on 19 nights. Removed the mirrors for silvering. Kept telescope in general working order.

Temporary Assistant R. M. Petrie observed on 6 nights securing 46 spectrograms. Measured 38 plates for radial velocity. Worked on the transformation of co-cordinates (2.5 days_. Prepared and gave on talk on ‘Planetary Temperatures”. Worked on the orbit of HD 6611.

Temporary Assistant P. M. Millman observed on 5 nights securing 39 spectrograms from 45 plates. Measured 61 plates. Computed 2½ days. gave talk on Short Period Binary Stars.

Temporary Assistant Dr. H. Zanstra worked 2 nights obtaining 2 long exposure spectrograms of planetary nebulae. Continued theoretical research on the luminosity of comets.