Visible Neptune 1989-08-17 : 無料・フリー素材/写真
Visible Neptune 1989-08-17 / geckzilla
| ライセンス | クリエイティブ・コモンズ 表示 2.1 |
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| 説明 | Edit 2024 Jan 17: I uploaded a reprocessed version of this with less saturation and a bit better alignment of the planet and clouds. The pink isn't as obvious, but is still there.And here's my take on a three-color visible light image of Neptune from Voyager 2. I was very interested to see the pink features in the clouds and northern pole come about with no effort whatsoever. The filter choices I think are a bit wider than the Hubble filters, so the image came out less saturated. I went ahead and enhanced the saturation of this image a bit after deciding it probably was a bit too pale.What really surprises me about this is that I can't find any other images quite like it. Is Neptune really purplish/pink in its north pole and around its limb? Is it decorated with bright, pinkish clouds? I wish I could say for sure. It is different enough that I doubt myself significantly. Nonetheless, I wish to share it.I have noted that most images utilize the Voyager "Orange" filter for red light, but when I looked at the filter plots I decided it would be more appropriate to use the "Green" filter, and the same pattern followed for the other two channels. I have made a note of the central wavelength of the filters in my list here. You can see if you agree with my choices. I used Photoshop's puppet warp feature to align the brighter clouds.Red: Voyager 2/ISS 585nm "Green" Filter (C1115234_RAW)Green: Voyager 2/ISS 480nm "Blue" Filter (C1115216_RAW)Blue: Voyager 2/ISS 400nm "Violet" Filter (C1115210_RAW) |
| 撮影日 | 2017-12-17 02:59:00 |
| 撮影者 | geckzilla |
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