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2012 Venus Transit Observation from Mauna Kea
Observers: Olivier Guyon, Christophe Clergeon, Frantz Martinache, Eric Jeschke, Martin Turbet, Adrien Barbet
Equipment
- Celestron 14 Edge HD telescope, full aperture Baader solar film, photographic grade (ND 3.8)
- Canon 550D DSLR camera, shooting at ~2 fps in RAW mode
- Andor Zyla camera, shooting at 25 fps full frame, 16 bit resolution, rolling shutter
Observers: Guyon, Martinache, Clergeon, Barbet
Observing Equipment
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Observing was done from the parking lot at the foot of the Subaru telescope dome
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The telescope is shielded from wind by cars and a large tarp
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Telescope and cameras.
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Telescope focal plane: a beam splitter is used to share light between the DSLR camera and the Zyla camera.
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Transit images - DSLR camera
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Single DSLR frame during ingress.
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Single DSLR frame during ingress. Same image as above, with different brightness scale. The light refracted by Venus' atmosphere is clearly visible
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Single DSLR frame during ingress. Both bright and dark features are shown, as two different brightness scales are used for the bright and faint parts of the image.
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Transit images - CMOS camera
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Single CMOS frame during ingress (no processing). Such images were acquired at 25fps for the whole transit duration.
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Current project status
We are analyzing the images. Our two scientific goals are:
- Measure the light refracted by Venus' atmosphere during ingress as a function of time and color (4 colors available)
- Measure small-scale features on the Sun surface using Venus disk as a moving mask
More information will be posted here as data analysis moves forward.
Page content last updated:
27/06/2023 06:35:52 HST
html file generated 27/06/2023 06:34:43 HST
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