Plaskett Report for January 1927

The observing weather has been the poorest on record here for the month of January. Only 29 plates were secured on 8 nights with a total of 38.7 hours of observing time. The average for the eight-year period is 86 plates on 10 nights with 62.7 hours of observing.

Director J. S. Plaskett obtained 7 spectrograms on 2 nights and measured 15 spectrograms for radial velocity. Remeasured some plates of HD 193536, obtained preliminary values and computed least-squares corrections to the orbit. Handled the usual correspondence and administrative work.

Assistant Director W. E. Harper measured 95 spectra for radial velocity. Determined the period of HR 859 and Boss 809. Prepared and gave an address before the Victoria Table of Ye Loyal Knights of Ye Round Table.

Tue, Jan 18, 1927 – 4 · Times Colonist (Victoria, British Columbia, Canada) ·

Research Astronomer H. H. Plaskett worked parts of two nights obtaining 1 long exposure spectrum and one ordinary plate. Finished completely all measurement and reduction in Z Andromedae. Commenced discussion. A good deal of time spent reading Utrecht work on line intensities.

Assistant Astronomer J. A. Pearce observed on 3 nights, obtaining 16 spectrograms. Measured 39 spectrograms for radial velocity. Prepared and gave 2 lectures. Statistical work on class B stars.

[Pearce gave a talk at Victoria College on unsolved problems in the Solar System, Ed.]

Mon, Jan 24, 1927 – 4 · Times Colonist (Victoria, British Columbia, Canada) ·
Astronomical Computer S. N. Hill did work on the period of HD 32990. Measured and reduced 12 B-type spectrograms for radial velocity. Writing article for the Journal of the RASC. Preparing observational statistics for the Dominion Astrophysical Observatory, Victoria and the same for Mt. Wilson over an 8-year period. Computing average weighted residuals and weighted means for lines measured in 38  observations of HD 109387. Work in the library.

Observing Assistant R. M. Petrie observed 1 night securing 4 plates.

Senior Clerk Typist Miss H. R. Keay handled the usual accounts, plates, correspondence and reports. Typed orbit if HD 212240 for Mr. Hill. Read proof of Volume III, Numbers 15, 16, 17 and Volume IV, Number 1. Miscellaneous astronomical typing.

Instrument Maker Foreman T. T. Hutchison assisted in observing on 3 nights. General attention to telescope during damp weather.

Temporary Assistant Astronomer A. E. Johns continued theoretical work on changes in spectroscopic orbits. Left Jan 9.