Meetings are held once a month, and the dates can be found on our Facebook page (@assajhb). Visitors are welcome to attend all our meetings. The Centre has two medium-sized observatories housing four telescopes and has the use of the 26.5-inch Innes Telescope. Viewing evenings that are open to the public are conducted on Fridays when the Moon is nearest the 1st and 3rd Quarter. We also run an amateur telescope making class every Saturday afternoon at Parktown Boys’ High School
Our new committee for 2019/20: Carmel Ives (Chairperson), Frans van Nieuwkerk, Eric Mulovhedzi, Etsuo Takayanagi, Rodney Hyman, Rory de Beer, and Tessa Collins. Membership Advantages
Membership of the Centre confers several benefits. Not least of these is the opportunity to have contact with friendly, knowledgeable individuals who share your interests in astronomy. We freely impart our knowledge, ideas, enthusiasm, advice, and experience. We encourage you to do likewise.
As a member, you would have access to our facilities, including a library dedicated to astronomy and related disciplines.
Apart from this, you get to participate in our other events and activities. Our ties to the Planetarium are also advantageous. Have you just purchased a telescope? We can help you to learn to set it up and use it. Are you thinking of purchasing one? We can help you make the right choice. Want to know what’s up there? Need to discuss your theories? We are here!
In addition to the activities already mentioned above, our members – according to their individual needs and interests – are involved in a variety of activities including the following…
Classes are conducted on an ongoing basis. With the application of some effort and a really modest outlay in cash, you too can build a fully functional telescope that will keep you happily observing for years to come.
A large number of instruments have been completed under our guidance over the last several years. These range from the basic and plain to the sophisticated, beautiful and even computer-controlled: in this case, not even the sky is the limit.
By building it yourself, you can not only save substantial sums of money but also tailor-make an instrument to your own specific needs.
The satisfaction of fashioning an optical surface to an accuracy of a fraction of the wavelength of light with your bare hands is matched only by the pride of accomplishment when you stand back to survey your personal creation and the enjoyment of observing with something you have built yourself. The first glimpse of the heavens through your own home-built telescope is truly an experience without parallel.
Even if you are not interested in building a telescope, visiting us may be worthwhile – you can learn how a typical astronomical telescope works and be better prepared for making purchasing decisions.
Group Activities and Excursions:
These range from star parties (informal gatherings for deep-sky viewing, often at dark sites, through visits to observatories, impact craters and other places of scientific interest, to meteorite hunting and even eclipse viewing expeditions. We take advantage of circumstances such as visiting scientific luminaries, or astronomical events such as meteor showers and the appearance of comets to hold extraordinary meetings, observing sessions and gatherings. Courses in constellation recognition, basic astronomy, use of instruments and so on are offered whenever there is sufficient demand. There are also purely social activities, exemplified by the end-of-year “solstice party”. Once a year, we host the ScopeX Telescope and Astronomy exposition. Browse our site for more information.
Why not involve yourself in contributing to our newsletter Canopus? Researching areas of interest to you and putting them forth for others to enjoy is a fulfilling and educational experience.
Participation in scientifically valuable observing programs:
Amateur astronomers can and do provide input to professional programs. Surprisingly, many of these need only simple equipment such as binoculars (or even the naked eye!) to accomplish. Examples of exciting and fulfilling programs in which our members are active include:
Approximately one-third of the world’s solar observers are based in Southern Africa. They make regular, detailed observations of the sun, recording sunspots, solar flares, and electromagnetic disturbances.
Lunar Occultations occur when the Moon passes in front of a star. By accurately timing the disappearance and reappearance of the star, knowledge of both the Moon’s orbit and the positions of the stars can be greatly refined. Observations of Grazing Occultations â€“ during which the stars just skim the edge of the Moon, rather than being hidden entirely â€“ additionally assist in accurately mapping the Polar Regions of the Moon.
The observation of Variable Stars is probably the most important and exciting contribution that amateurs make to science. There are a number of reasons why a star may vary in brightness and a variety of behaviors some change brightness in a regular cyclic fashion with periods ranging from days to years, whereas others may undergo sudden, rapid and irregular brightening and dimming. Amateurs around the world simply record their estimates of the brightness of a given variable star with respect to adjacent stars of known brightness and forward them to a global clearinghouse for use by professionals.”