Thursday required an early start to beat the infamous N1-traffic and have breakfast at the Rcafe in Long Street (go here to find out more) before starting our day. We left Brackenfell at 05:17, which was actually later than our original ITD of 05:00. ITD? My shorthand for Intended Time of Departure. We were parked in front of Rcafe by 05:45 which meant that the trip had taken us a mere 28 minutes. As soon as the doors opened at 06:00 Lynnette and I went inside to order two much needed Americano’s to start the day properly. What really amazed us was that the owner and staff recognized us the moment we walked in the door and it was a few days more than a year since we’d last been there! Auke arrived shortly after us and ordered his cappuccino. After breakfast, we headed for the Iziko South African Museum (click here for more information) where Benjamin was waiting to unlock the gates for us and set out the traffic cones to prevent vehicles entering our display and observing space in the amphitheatre. The weather was clear but blustery. The wind was, in fact, such a nuisance that I eventually took down and put away the posters, as the frames were being badly scratched every time they toppled over onto the brick paving. Anyway, by 08:00 we were ready to roll and all we needed was a visitor or two, which we soon got.
Thursday’s are popular school days at Iziko and we had three groups that we managed to convince that they should take a peek at the Sun. There were several other school groups whose teachers waved us away when we invited them to view the Sun. Being a weekday many of our visitors were from outside the country’s borders as most South Africans were hard at work earning an income. Many of the tour guides with the groups declined to let their tourists take a look at the Sun. Their reason was mostly that they had a schedule to keep to and did not have the time. Nevertheless, we had groups from Gabon, Thailand, Hong Kong, France, Netherlands, Israel, and Germany.
It was also nice to have the research staff from the backrooms of Iziko pay us a visit. I was especially pleased to make the acquaintance of Jay van den Berg a palaeontologist on Dr Roger Smith’s staff and Clair Browning the newly appointed Curator of the Karoo Collection.
The problem of getting people to sign our visitor’s book was highlighted for the umpteenth time. Many people who viewed the Sun through our telescopes flatly refused to sign the list and some actually became quite agitated when asked to do so. This problem is exasperated when one is busy and you simply do not have time to chase after people and ask them to sign. So, once again, our signature total (288) and counter tally (597) do not agree. I am more convinced than ever that the answer lies in devising a means to automatically count the number of people who look into each telescope’s eyepiece.
Because the Sun appears as a very bland and uninteresting white ball as a result of of the solar filter fitted to Lorenzo, many viewers say it looks like the Moon. So I decided to do some experimenting with filters to make the image more “exciting”. The images were all taken with my mobile and I am afraid that I do not have the world’s steadiest hand, so the photos are not of the best quality.
Well there we were with ringside seats and a cloudy sky. Thin high level clouds which would not have been too much of a problem and thicker, discount fast moving low level clouds moving in ahead of a cold front. It was the low level lot that were a problem because a gap would hardly have opened up when it was promptly closed up again. Despite the adverse conditions I did manage to get several photographs of the partially eclipsed sun.
I have put the time each photograph was taken in the caption so that one gets some idea of the progression of the eclipse. All the photographs were taken with a Nikon D5100 camera mounted at prime focus on a Newtonian reflector (D=250), see ISO 400 and shutter speed = 0.25 seconds.
The 0.5m and 0.75m telescopes will soon be leaving Sutherland for Durban (University of KwaZulu Natal) and Boyden (University of Free State) respectively.
The 0.5m was constructed by Boller & Chivens of Pasadena, no rx California, sales for the Republic Observatory in Johannesburg at the end of 1968. Boller & Chivens collaborated with Perkin-Elmer during the 1950’s to develop and manufacture the Baker-Nunn satellite tracking camera for the United States Vanguard satellite tracking program. Eventually the company was taken over by Perkin-Elmer in 1965. The telescope’s main function at the Republic Observatory was photometry and planetary photography and was, look in fact, the only telescope ready for use in June 1972 at the new Southern African Astronomical Observatory (SAAO) location in Sutherland. Initially it was used with the Texas designed UCT high-speed photometer connected to a Nova minicomputer with software by R.E. Nather. Later the “People’s Photometer”, designed by Richard Bingham and built at the Greenwich Observatory, became the main instrument deployed with this telescope. A considerable number of publications about rapid variables such as dwarf novae originated from data produced by the 0.5m telescope.
The mounting of the 0.75m was originally located in at the SAAO site in Cape Town. Its old home is is currently the IT building. While there, from 1964 onward, it was officially known as the Multiple Refractor Mount (MRM) because it carried three refractors and the largest of the three produced around 7000 photographic plates between 1964 and 1970. These plates were part of the extensive Southern Reference Star Programme. The 0.75m telescope itself was a reflector telescope and was specially built for installation in Sutherland by Grubb Parsons of Newcastle upon Tyne, England, in 1974. Grubb Parsons was officially Sir Howard Grubb, Parsons and Co. Ltd. The company was originally founded in Dublin by Thomas Grubb as the Grubb Telescope Company in 1833. He was joined by his son Howard in 1864. In 1925 Sir Charles Parsons bought the company and renamed it. The company had an illustrious career as a builder of formidable telescopes until it ceased to trade in 1985. A list is provided at the end of this post. The 0.75m telescope also had an impressive career at Sutherland where it was used for many important infrared and visible light studies of stars, including the supernova that exploded in 1987 in one of our neighbouring galaxies, the Large Magellanic Cloud.
According to Dr. Ramotholo Sefako, head of Telescope Operations at the SAAO, says the domes of the 0.5m and 0.75m telescopes will be modified after the telescopes have been moved. Both domes will eventually house new robotic telescopes. One of these telescopes is the 0.65m MeerLICHT that will be used to simultaneously observe the same part of the sky at night as the MeerKAT radio telescope outside Carnarvon. It will provide a real time optical view of the radio transient sky as observed on MeerKAT. MeerLICHT is jointly owned by the University of Cape Town, SAAO, the Radboud University Nijmegen, the Netherlands Organisation for Scientific Research (NOW), and University of Oxford. The second dome will house the new SAAO 1.0m wide field telescope with modern instrumentation. Currently none of the SAAO telescopes have a wide field so this creates a new dimension in the SAAO’s research capabilities. This telescope will be installed late in 2015 or early in 2016.
Some telescopes produced by the Grubb Telescope Company and Grubb Parsons of Newcastle upon Tyne.
The “Great Melbourne Telescope” – a 48-inch-diameter (122cm) reflecting telescope with a speculum primary mirror (1868).
The 27-inch (68cm) refractor for the Vienna Observatory (1878).
The 10-inch (25cm) refractor at Armagh Observatory (1882).
Seven 13 inch (33cm) refracting telescopes for the Carte du Ciel international photographic star catalogue project (1887).
The 28-inch (71cm) refractor at the Royal Observatory, Greenwich (1893).
The 10-inch (25cm) refractor at Coats Observatory, Paisley (1898).
After 1925 they built the optical components for the Anglo-Australian Telescope, the UK Infrared Telescope, the Isaac Newton Telescope and the William Herschel Telescope.
Donors Alan & Rose Cassells – the two lights for the interior of the marquee.
Speakers (in order of appearance) Martin Lyons – “Live Video Astronomy Demo”
Kos Coroniaos – “Amateur Astronomy in South Africa”
Martin Lyons – “Basic Spectroscopic Astronomy”
Lia Labuschagne – “Brown Dwarfs”
Alan Cassels – “Comfortable observing – Moving the Beast”
Auke Slotegraaf – “Photometry with a DSLR Camera”
Kechil Kirkham – “The SKA – The story so far”
Kerry Patterson – “Planetary Models of Hu Aquarii”
Brett du Preez – “Collimating a Newtonian Reflector Telescope”
Newcomers Dwayne Engelbrecht, Lia Labuschagne, Charmaine Pretorius, Anneke Steyn, Bernie, Michelle & Keagan Swanepoel, Gerhard Vermeulen and Wendy Vermeulen
Day visitors Anneliese & Tertius Carstens, Willie Lombard & Elise, Inus & Elsophie van Staden
The “old hands” Alan & Rose Cassells, Charl and Yolandi Cater, Kos Coronaios, Brett du Preez, Wim Filmalter, Iain Finlay, Kechil Kirkham, Martin Lyons, Kerry Paterson, John Richards, Leslie Rose, Auke Slotegraaf, Willem van Zyl, and of course Lynnette and myself.
Lynnette, Snorre the cat and I got off to a very early start in Brackenfell and arrived at Night Sky by about 09:30 on Thursday. Alan and Rose were already settled in and shortly after 10:00 Anneliese Carstens of Bonnievale Verhuurings and her two assistants were on site to pitch the marquee tent. The whole process took just over 70 minute. As soon as that was done, we started putting up the banners and posters and doing all the other essentials to get the inside organized. Alan and Rose pitched in to help with this and without their very able assistance, the job would have taken a great deal longer. Thanks guys, as usual your convivial company made an otherwise boring task seem quite fun. Lynnette got the Admin table sorted out, as well as the chairs in the main tent and the coffee bar at the back of the tent.
Thursday evening didn’t offer much by way of stargazing as it was one of those evenings where the clouds opened up and, just as one thought it was telescope time, they closed in again. Somewhere between 02:00 and 03:00 I got up to have a peek and it was totally clear, but I was too lazy to take the telescopes outside.
During the course of Friday most of the others trickled in, but by sunset there were still people on the list who had not turned up so we decided to move the Pub Quiz forward to the Saturday.
The weather looked indecisive about being cloudy or not, so we socialized and had an uncharacteristically late braai while Martin Lyons started setting up for his live video astronomy demonstration. Unfortunately the electronic gremlins were out in force and even with the able assistance of Kos Coraniaos the system obstinately refused to perform to expectations. As the clouds had cleared up we all dispersed to the telescopes and spent the rest of the evening observing or introducing the newcomers to the wonders of the night sky.
On Saturday Kos kicked off the programme followed by Lia in Martin’s vacant slot. The planned braai turned into a bit of a fiasco, because it started raining quite heavily just as the fires got going nicely. Kos and Wim’s attempts to rescue one of the fires by putting the braai drum on Brett and Leslie’s stoep, had unexpected consequences. Despite the fact that they closed the doors and windows the smoke from the fire still got into the house and tainted everything with a distinct “wood smoke” odour.
Even though Martin’s talk had been cancelled as a result of his equipment failure, leaving an open slot for an extended lunch, the braai was so late that Alan had to wait for people to finish eating before he could start his talk. After Alan’s talk, Auke presented Alan with his long-awaited observing certificate and a special t-shirt commemorating his acquisition of a 12-inch telescope. After that ceremony we took the group photo and set ourselves up for the Pub Quiz after supper.
The Pub Quiz was contended between six teams. After the first three rounds, three teams were eliminated leaving three to contest the next four rounds before Lia and John’s team made it through to the finals. It was a tight race between these two teams until John’s team took the lead. By that time the weather had cleared completely leaving everyone itching to get to the telescopes, so this year’s Quiz, like the Spring SSP in 2013, was not taken to the individual level. Probably a good thing because John has already won the Quiz twice before on an individual basis!
For the evening and late-night coffee we had a very nice cake baked by Gesina to commemorate the seventh Southern Star Party. The cake was iced in blue and decorated with silver stars. The cake also served to celebrate John Richard’s 70th birthday and we wish him well on his next 100 years. A very nice gesture indeed, thanks Lynnette.
Sunday’s day-programme went off without a hitch. Auke had to leave just after his talk to get Kos back to Somerset West and then he unfortunately encountered a problem and was unable to return as planned. By evening the sky was clouded over, much to everyone’s disappointment, so we also cancelled the scheduled “Ethno-What’s up Tonight”. Anneliese and Tertius had come over specially for the stars, so it was a great disappointment for them. However, just as we were sitting down having coffee with them, Leslie knocked on the door and announced that the clouds were clearing so we could set up a telescope and take them on a tour. Before midnight Lynnette and I gave up the unequal battle with the dew and went to bed.
On Monday morning everyone was packing up and saying goodbyes. In-between all the farewells, we took down the posters and banners in the tent, folded up tables, stacked chairs and loaded the trailer. By that evening it was only Lynnette, Snorre, myself and Iain and Willem left.
On Tuesday morning with the clouds building up, Anneliese and her crew arrived to take down the marquee. Iain and Willem were also packing up and when Anneliese and her crew had finished one of her crew remarked, “Look at those two still struggling with that little tent and we’ve already finished with the big one.” Iain and Willem did eventually finish and left shortly after midday. Lynnette and Snorre and I stayed till Wednesday before we left for home via the Pitkos Farm Stall. Regrettably they had no more roosterkoek by the time we got there so we just had coffee and bought a box of Nuy Muscadel for the next SSP in October 2014 before heading home!
This table gives the sky brightness readings obtained during the Autumn 2014 Southern Star Party.