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17. Transit of Venus, June 5, 2012 |
| Distance: ~108 million km from Sun |
| App. Magnitude: -26.7 (Sun), -4.9 (Venus at brightest) |
| App. Dimensions: ~32' (Sun), 10" to 66" (Venus) (cf. telescope field of view 119') |
Notes: The transit lasted from about 3:06 pm to 7 pm. The sky had a cloud cover of about 50 percent. The four bitmap images were resized and assembled into one .bmp file of width 1600 in Mathematica with ImageAssemble, and then saved as a .jpeg file in Preview with minimal compression. Resizing to smaller bitmap sizes produces junky looking images. A solar filter that fits onto the front of the scope is necessary to prevent overheating and damage to the scope and camera. Zoom in/out with ⌘↑(+/-) (Mac), ctrl (+/-) (PC). |
| Location: Nevada City, courtesy Alan and Lynette James, Judy Tartaglia and Sandy |
| Date: June 5, 2012 |
| Scope: Stellarvue 80ED |
| Mount: CGEM |
| Guide scope: none |
| Guide camera: none |
| Guide program: none |
| Camera: Canon T1i, IR filter mod by Hap Griffin |
| ISO: 100 |
| Exposures: 1 at 1/320 sec each, darks: none, biases: none, flats: none |
| Processing software: Nebulosity |
| Processing: demosaic and square, power stretch, curves, color scaling |
