Plaskett Report for February 1925

The observing weather has continued very poor throughout the month, a total of only 36 plates being secured on 10 nights. The average for the past six years for this month is 132 plates on 14 nights. The extremes are Feb. of last year when only 9 plates were secured and the good Feb of 1920 when 337 were obtained.

Director J. S. Plaskett obtained 1 spectrogram on 1 night and measured and remeasured 16 for radial velocity.  Worked on 3 binaries and made two least-squares corrections for one orbit. Handled the usual correspondence and administrative work.

Assistant Director W. E. Harper worked 4 nights and obtained 14 spectra. Measured 20 for radial velocity. Worked up the orbit of π Cephei and wrote up article on same. Investigating A-type spectra for absolute magnitude. He prepared and gave two lectures.

[Harper gave a talk to the Vancouver Institute titled “Some Modern Observatories and Their Work”, Ed.]

Mon, Feb 2, 1925 – 14 · The Victoria Daily Times (Victoria, British Columbia, Canada) ·

Astronomer H. H. Plaskett worked 1 night and part of another. Secured a good interferometer spectrum of the Orion nebula. In day time measured up the interferometer spectra on the microphotometer involving between three and four thousand photometric matches. Obtained density distribution curves for the lines NI and Hβ.

Assistant Astronomer J. A. Pearce obtained 20 plates on 4 nights and measured 14 plates for radial velocity. Worked on the orbit of HD 216014

Astronomical Computer S. N. Hill measured and reduced for radial velocity 44 spectrograms. Plotted the velocity curve of 12 Lacertae.

Senior Clerk Typist Miss H. R. Keay handled the usual plates, correspondence, accounts and reports. Typed a lecture for Mr. Harper. Typed the new mailing list making all necessary corrections from the old one. Entered the new lantern slides in catalogue.

Instrument Maker Foreman T. T. Hutchison assisted in observing on 8 nights. Handled the usual supervision and repairs to the telescope mechanism.