Akatsuki Venus Climate Orbiter |
Akatsuki Venus Climate Orbiter |
Mar 13 2010, 11:29 AM
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#1
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Senior Member Group: Members Posts: 1729 Joined: 3-August 06 From: 43° 35' 53" N 1° 26' 35" E Member No.: 1004 |
I thought it was time to start a separate thread on this mission, launching soon
some good medium-resolution images of the spacecraft are available on JAXA digital archives http://jda.jaxa.jp/jda/p3_e.php?time=N&...mp;mission=4066 |
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Aug 9 2020, 05:12 PM
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#2
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Junior Member Group: Members Posts: 80 Joined: 18-October 15 From: Russia Member No.: 7822 |
This de-rotated animation shows the night side of Venus in IR.
Near the center you can see a giant, previously unknown planet-scale wave feature. The animation covers about 14 hours of observations -------------------- |
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Aug 9 2020, 05:43 PM
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#3
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Senior Member Group: Members Posts: 2530 Joined: 20-April 05 Member No.: 321 |
This de-rotated animation shows the night side of Venus in IR. Near the center you can see a giant, previously unknown planet-scale wave feature. The animation covers about 14 hours of observations Beautiful work, Roman. I have photographed Venus in UV regularly and it's nice to see the cloud motion occur on this time scale. From Earth, one can see about 3 hours maximum in sequence, and then the change a day later, after which the planet has rotated 90°. Many of the details here are moving on a scale of minutes and it both beautiful and illuminating. I'm unsure what the planet-scale wave feature is: Is that dark curve across the middle the feature, or an artifact? Akatsuki found a gigantic planet-scale wave running north to south early in its mission, but the imagery didn't look much like this. Is this another example of that phenomenon? |
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Jul 12 2023, 10:28 PM
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#4
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Senior Member Group: Members Posts: 2998 Joined: 30-October 04 Member No.: 105 |
Beautiful work, Roman. I have photographed Venus in UV regularly and it's nice to see the cloud motion occur on this time scale. From Earth, one can see about 3 hours maximum in sequence, and then the change a day later, after which the planet has rotated 90°. Many of the details here are moving on a scale of minutes and it both beautiful and illuminating. I'm unsure what the planet-scale wave feature is: Is that dark curve across the middle the feature, or an artifact? Akatsuki found a gigantic planet-scale wave running north to south early in its mission, but the imagery didn't look much like this. Is this another example of that phenomenon? Current amateur UV studies of Venus are amazing. One correction: the rotation period of Venus is 243 days and the superrotation of the atmosphere is 96 hours, so that "day later" was a view of the atmosphere. -------------------- |
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Jul 13 2023, 03:01 PM
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#5
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Member Group: Members Posts: 233 Joined: 14-January 22 Member No.: 9140 |
One correction: the rotation period of Venus is 243 days and the superrotation of the atmosphere is 96 hours, so that "day later" was a view of the atmosphere. A caveat there – the cloud rotation may average about 96 hours but that varies quite a bit, so in any particular span of 3 to 5 days, you might get just about exactly one rotation of the clouds, but you might also have quite a bit of error. Venus Express had some results characterizing this variation, which I think remains unpredictable. |
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