johnnydeep wrote: ↑Sat Jun 11, 2022 7:47 pm
alter-ego wrote: ↑Sat Jun 11, 2022 5:09 pm
It would appear straight and near the zenith. The Stellarium screenshot shows the fisheye view with a 360° horizon, and the horizontal coordinate system. The zenith is at the center. Of course, since the view below more closely replicates the APOD image, it too appears more colorful and brighter than you'd see with your eyes.
How you manage to do this stuff is amazing. So, if you assume the road is straight, how would it be oriented under this sky on your image?
Yeah, thanks. I do enjoy navigating through the morass of stars and galaxies. It'd be fun to try an intra-galactic, interactive navigation simulator where there'd be cosmic navigation landmarks and a few million stars to go to at mega-warp speeds! I'd love to have an option where I get dumped at some random position, then find my way home! Pretty trippy.
Yes, your star annotations are correct! Nice job! Those stars happen to be the three brightest stars in the APOD. Vega is #1.
Prior to your road placement question, I wanted to reorient my fish-eye view to the APOD view. Lo and behold, it looked way off. I quickly concluded the exposure timing(s) were earlier in the night. The APOD view is far from the zenith. Identifying Vega's altitude in the APOD put about 35° lower, and almost due east. I also identified an asterism just above the road to nail the southward heading direction.
Bottom line: The best I can ascertain, the road (middle of the APOD) heads almost due east, and makes about a 90° bend and then heads due south. Note, the MW will appear curved wrt the horizon.
A few things:
• It's difficult, or likely not possible, to draw straight-lines to demarcate the APOD image boundaries, so instead, I posted an oversized Stellarium view, including the zenith.
• I labeled Polaris as a reference. The APOD composite does not show Polaris as it's just beyond the left edge (5°) of the APOD, and about 15% down from the top edge. Also, most, it not all, of Cassiopeia is behind the tree at the base of the MW.
• Per David Cruz's imaging steps, the total sequenced exposure time was at least 30 minutes. The process of blending these images into the panorama logically introduces distortion that negates any standard projection simulations within Stellarium:
For this 180° panorama I went with 6 panels for the sky and 6 panels Foreground. For the Sky I shoot for each panel 5x1min tracked exposures to stack them and reduce noise. For the foreground I shoot each panel 4x30s untracked exposures. The sky and foreground were later blended together in editing.
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