Click on the thumbnail at the bottom right of this page to go to the bitmap scan of this document. The text of this document appears immediately below.
THE ROYAL ASTRONOMICAL SOCIETY OF CANADA STANDING COMMITTEE ON OBSERVATIONAL ACTIVITIES LUNAR SECTION BULLETIN NO.5 Announcement Upon the recent retirement of the Lunar Co-ordinator, Mr. R.R. Thompson, President of the Toronto Centre, the writer was asked by Mr. Vent Ramsay, as Chairman of the National Committee on Observational Activities, to assume this position. LUNAR ECLIPSE, JUNE 24th, 1964 The first lunar eclipse since the very dark eclipse of December 30th, 1963, has aroused considerable interest among lunar observers, particularly those wishing to ccnpare these two eclipses with the two very dark total lunar eclipses of 1913. Unfortunately for observers in Centres west of Windsor, Ontario, totality will be over when the moon has risen, a few minutes before sunset. The following is a list of the nine Centres with contacts in each which are pre- sently cooperating with the National Committee on Lunar Observing; moonrise and sun- set times are provided in Universal Time (U.T.) for Wednesday, June 24th, 1964: Centre Contact Moonrise Sunset Halifax W. L. Orr 00 00 00 04 Quebec Pierre Houde 00 38 00 44 Montreal George Wedge 00 44 00 49 Ottawa W. M. Cameron 00 49 00 53 Kingston Raymond Burns 00 48 00 52 Niagara Falls Frank Campbell 00 55 00 59 Toronto Archie Ostrander 01 00 01 04 Hamilton J. G. Craig 00 59 01 03 Edmonton William Cable 04 06 04 10 U.T. h. m. Moon enters penumbra 21 58 Moon enters umbra (1st con.) 23 09 Totality begins (2nd con.) 0 16 (Diagram here.) Middle of eclipse 1 06 Totality ends (3rd con.) 1 57 Moon leaves umbra (4th con.) 3 03 Moon leaves penumbra 4 14 While Halifax is the only Centre which can observe 2nd contact, valuable contribu- tions can be made by other Centres should they wish to carry out one or more of the following programmes. Crater Timing One of the maze important aspects of this event will be the timing of the passage of the moon through the earth's shadow. It is recommended that a small team (2 to 3 persons) be organised to time the immersion and emersion of specific craters into, and out of, the shadow as it crosses the face of the moon. Timing is best accomplished by radio time signals (CHU Ottawa, 3.330 K.C.). If these are simultaneously recorded on tape, along with the observer's verbal estimate, a very accurate time determination is provided, as well as a permanent record. As the official record of these events consists of the reports of those specifically responsible for timing, it is best to station them at considerable distance from the others participating. In deciphering a tape, much confusion can result when the record contains unwanted contributions from several, people in addition to the comments of the appointed observers.