Mercury Transit, November 9th 2006, Dargaville High School.
Last night I brought three telescopes and CCD occultation camera to Dargaville High School where I teach. I slept under the stars, being nervous about getting too far away from my computerised Meade SCT. It was its first night to 'sleep' outside and I was nervous about any rain, even though it had sheets and a variety of tarpaulins to cover it. I woke up at hourly intervals from 3pm to 5:30 (when the swim club arrived to train) and admired the incredible fortune I seemed to have with the weather - until about 6am!
My first public visitors arrived at 8 am in gale force winds and I nearly brought the telescope in. I was just about to lose its alignment by bringing it in, when at 8:12 we had a beautiful break in the clouds. Frustratingly, the break wasn't long enough for me to get the three tarps off and get the solar filters weaved up and inside, but I was ready for the next gap and convinced to stick out the rain, hoping it wouldn't get into the scope.
The first class arrived at 9:00, and had to satisfy themselves with
animations, pictures, and a brief explanation about the equatorial
telescopes I had indoors. The next class arrived at 9:20 and
miraculously the rain stopped, although the gale force winds didn't, and
we got our first view. The sun occasionally played hide and seek with us,
but the next 230 students and another 20 staff and public got to see a
40cm solar projection of mercury, look through the 8" with a Thousand Oaks
filter, and best of all - look for the prominence through the H-Alpha.
We have three disabled students at our school. A blind student came along
and we demonstrated the event with the yellow ballons and a small table
tennis ball. Another student who has no muscle control whatsoever was
wheeled up to the projection screen for a close up view. Finally one of my
albino student with only 10% vision was able to see colour in both scopes
and make out the sunspot in the projection. It was lovely that they
weren't excluded.
Despite lots of preparation we were unsuccessful in videoing the egress as
the first class of the day showed up for another try, and back came the
rain and the clouds. I also found the sun so bright that it was difficult
to focus the camera on the TV set - despite that I had predetermined the
precise focus. Having gale force wind didn't help, so I'm not sure if the
images would have come out that well, but it would have been really nice
to get Mercury leaving the sun - especially if there was any chance of
picking it up against the chromosphere. All in all though, I can't
complain at all. I had several female top students approach me to announce
they wanted to become astromers and they insisted on discussing then and
there which subjects they needed to take at school to follow this career
path!
The senior hospitality students who were catering for the event did a
brilliant job enticing the morning visitors out to the venue in the
pouring rain. One of the breakfast dishes was a sunny side up egg, with a
little currant to represent mercury. For lunch, one of the desert
offerings was "Stargazer muffins" - vivid yellow lemon icing with
chocolate chips.
It took nearly 3 hours to get my gear into two cars to come home as the
skies closed in after the egress. On arrival home I was completely soaked
getting from the car to the house. We are reporting gale force winds at
the moment, and it doesn't seem any breezier than it was all day. I'm
too tired to face unpacking back to the observatory, so that may have to
wait until after I've caught up from having slept only a couple of hours
last night. As I've seen both a transit of Mercury and Venus before, the
highlight for me was to be able to show it to so many people, and arouse
so much interest in the event, and the gear.
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