Plaskett Report for September 1926

The month was above the average for seeing, a total of 198 plates being secured on 20 nights. Moreover of this number of nights, five were used in securing eight long-exposure spectra. The seven-year average for the month is 174 plates on 20 nights.

[Twenty-six Japanese students visited the Observatory as part of  their Victoria visit, Ed.]

Wed, Sep 8, 1926 – 8 · Times Colonist (Victoria, British Columbia, Canada) ·

Director J. S. Plaskett measure 22 spectrograms for radial velocity. Made three plates containing enlargements of 63 spectra and two line drawings for Volume IV, Number 1 of our Publications and completed MS for printer. Gave radio talk. Handled the usual correspondence and administrative work.

Assistant Director W. E. Harper worked 3 nights securing 28 spectra. Measured for radial velocity 44. Determined the orbit of HR 8169 making two least-squares solutions. Also determined orbit of 71 Aquilae and wrote up both orbits for publication. Making some enlargements to illustrate publication.

Research Astronomer H. H. Plaskett worked on 5 nights obtaining 8 long-exposure spectra. Measured for wave length and partially reduced 7 spectra of Z Andromedae. Did some reading on astrophysics.

Assistant Astronomer J. A. Pearce observed on 4 nights, obtaining 69 spectrograms. Measured 42 spectrograms for radial velocity. Worked on binary 209481. Computed new table for reducing spectrograms. This table gives the engine readings for 78 lines for the first dispersion employed (1918 Feb. 8 – 1919 Aug 12) based on the International System.

Astronomical Computer S. N. Hill measured and reduced for radial velocity 40 B-type spectrograms.Preparing table of line velocities reduced to sun of 38 measures of kappa Draconis. Work in connection with the library.

Temporary Assistant R. M. Petrie observed on 5 nights securing 57 spectrograms. Prepared orbit of Boss 3555 for publication. Measured 22 plates to determine radial velocity.

Temporary Assistant W. H. Christie observed on 3 nights obtaining 36 spectrograms for radial velocity and 29 plates for magnitude work on 12 Lacertae.

Senior Clerk Typist MIss H. R. Keay handled the usual correspondence, reports, accounts and plates. Prepared Volume IV, Number 1 for printer, Read the galley proof Volume III, Number 13. Prepared mailing list for sending out Volume III, Numbers 9 – 12. Other astronomical typing.

[Helena Keay’s sister, Norah, was a school teacher and was posted to Oyama, Ed.]

Tue, Sep 7, 1926 – 6 · Times Colonist (Victoria, British Columbia, Canada) ·

Instrument Maker Foreman T. T. Hutchison assisted in observing on 14 nights.