690814Planetary10_p2

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Planetary Bulletin No. 10	                                          -2-




JUPITER:   The giant planet was observed well this year. By comparing observa-
tions, I am working out a correlation between the darkness of the Southern
Equatorial Belt and the position of Callisto. It appears to be a valid correlation
but many observations are needed.

The Planetary Section has furnished three dozen satellite timings of the four
Galilean satellites to the Observatorio de Valonge of the Brazilian National Uni-
versity at Rio tie Janeiro. Again this was set up by the I.U.A.A. This all goes
to prove that our observations really are of value -- if reported.

SATURN:     A report of the work of the Section on Saturn will appear in a forth-
coming issue of the JOURNAL. Saturn is getting into a favourable position for
observing, so I hope that you will start making those Intensity and magnitude
estimates soon.



THE LAST WORD

The response to these bulletins has been most encouraging. Just one or two
Centres have not written some form of acknowledgement, so, PLEASE - if your
Centre is one of these, write a note to tell me what you are doing in the way
of Planetary observing, even if it is nothing!

Don't forget - communication between Centres was the big issue at the recent
General Assembly.













                                                  Kenneth E. Chilton,
                                                 National Co-ordinator,
                                                  Planetary Section,
                                   Standing Committee of Co-ordination of Centre
                                                        Activities,
                                            93 Currie Street, Hamilton 57, Ont.
                                                 Phone: 416-388-0586.

14 August, 1969.