Plaskett Report for December 1930

The observing weather during the month was somewhat above the average for the month. On 11 nights with 76.7 hours observing 63 plates were secured. The corresponding numbers for the twelve-year average for the month are 10 nights, 64.4 hours and 71 plates.

Taking the year as a whole, it was like last year much above the average for on 217 nights with a total of1415.3 hours observing 1070 plates were secured. The corresponding numbers for the twelve-year average are 207 nights, 1272.4 hours observing and 1524 plates.

The local meteorological statistics indicate 114 hours sunshine above the average whilst the precipitation was 8.2 inches below the average.

Approximately 207 persons visited the observatory during the month, make a grand total for the year of 33,318.

[Not related to the DAO, but there was an article in the Victoria Daily Times that a mountain would be selected in California for a new 200-inch telescope. That mountain would be Mt Palomar and the 200-inch telescope would begin operation in 1948., Ed.]

Tue, Dec 16, 1930 – 3 · The Victoria Daily Times (Victoria, British Columbia, Canada) ·

Director J.S. Plaskett – writing up and preparation of copy for Volume V, Number 2. Writing part of copy for Volume V, Number 3. Discussion of data and correspondence re spectroscopic binaries in Number 2. Handled the usual correspondence and administrative work.

Assistant Director W.E. Harper observed 5 nights securing 39 plates. Measured for radial velocity 73. Silvered mirrors.

Astronomer J.A. Pearce observed on 2 nights securing 11 spectrograms. Worked on Volume V, Number 3.

Astronomer C.S. Beals observed on 2 nights obtaining 6 plates. Completed measuring and compiling C and N wave lengths for publication. Began construction of photo-electric microphotometer. Set up spectrograph for spectrophotometric standardization on the observing floor of dome. Gave one seminar talk.

Astronomer R.O. Redman calibrated optical wedge in visible spectrum using 20 plates. Commenced further investigation into motions of K stars. Worked 2 nights, obtaining 7 plates. Measured 2 plates for radial velocity. Gave 1 seminar talk.

Computer S.N. Hill – deriving and checking solar system motion for B stars. Preparing solar motion graph for office use and one for publication. Computational and statistical work in connection with publication of B stars.

Clerk-Stenographer Miss L.M. Blake handled usual correspondence, accounts, reports and envelopes for 63 spectrograms. Typing tables and part of MSS of Volume V, Number 2. Proof reading.

Astronomical Assistant T.T. Hutchison assisted in observing on 6½ nights. Making some devices for controlling temperature of mirror and keeping telescope in running order.