2018-03-01 ========== John Kielkopf CDK20N grizbV filters Images selected to find sequence at about the same time to make composite RGB image. jupiter_rgb.png is combined from 0.03 second images Sloan r' -> red Johnson Cousins V -> green Sloan g' -> blue Images were aligned in AstroImageJ and balanced in color by eye. This file has a 2 pixel unsharp mask to slightly increase contrast. jupiter_rgb_usm.png is the same base image as the other, but another 2 pixel unsharp mask has been applied. Both images have been rotated so that N is up, E to the left, W to the right. The images should be in the same orientation as the XEphem simulation. As you look at the images, the Sun would be on your left, and Jupiter is not seen exactly fully illuminated. The right (west) edge is partly shadowed, giving it a slightly gibbous appearance. jupiter_rgb_usm.png shows Io faintly off to the right side. The other satellites are out of the field of this cropped image. The image jupiter_V_00119_d_nsew.png is from one of the V frames contributing to the RGB image and stretched to show the satellites. The original dark-subtracted 0.03 second V fits image, and a 1 second exposure take earlier, are in this directory for reference. Acquisition detail -- 100% full Moon Started at 00:30 EST on 03-02 04:35 ET Slew to Jupiter altitude 33 azimuth 165 and transits at 05:26 Satellites east to west -- Callisto Ganymede Europa Jupiter Io All visible tonight jupiter_00095.fits 04:39 r 1 second jupiter_00096.fits 04:40 i jupiter_00097.fits 04:41 V jupiter_00098.fits 04:42 g jupiter_00099.fits 04:42 g 0.05 jupiter_00100.fits 04:43 g 0.03 jupiter_00101.fits 04:44 g 0.03 jupiter_00102.fits 04:45 g 0.03 jupiter_00103.fits 04:46 r 0.03 overexposed jupiter_00104.fits 04:47 i 0.03 jupiter_00105.fits 04:48 i 0.03 jupiter_00106.fits 04:49 i 0.03 jupiter_00107.fits 04:50 z 0.03 jupiter_00108.fits 04:50 z 0.03 jupiter_00109.fits 04:50 z 0.03 jupiter_00110.fits 04:51 V 0.03 good jupiter_00111.fits 04:51 V 0.03 not so much jupiter_00112.fits 04:51 V 0.03 good dome azimuth -10 to 182.4 to partially block telescope aperture jupiter_00113.fits 04:53 r 0.03 good jupiter_00114.fits 04:54 r 0.03 good jupiter_00115.fits 04:55 r 0.03 good jupiter_00116.fits 04:55 r 0.03 good jupiter_00117.fits 04:56 V 0.03 good jupiter_00118.fits 04:57 V 0.03 good jupiter_00119.fits 04:57 V 0.03 good jupiter_00120.fits 04:57 g 0.03 good jupiter_00121.fits 04:57 g 0.03 good jupiter_00122.fits 04:57 g 0.03 good jupiter_00123.fits 04:59 i 0.03 good jupiter_00124.fits 04:59 i 0.03 good jupiter_00125.fits 04:59 i 0.03 good