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Thank you to report the error with the satellite visibility during transit. This is fixed in version 4.3-5010 you can install from https://sourceforge.net/projects/skychart/files/0-beta/ But I cannot reproduce the problem with the rotation. For me it always update when the time change, using the arrows or the time settings. The rotation is clearly visible, and Titan entry in shadow during 2025-08-11 eclipse at around 4:45 UT show shadow advance minute by minute. Can you try with this last beta 4.3 and tell me it it also work for you or not. |
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Updated to 4.3-5010. Moons are still transparent in transit, see Titan attached. Io was still visible when on the far side of Jupiter (attached). It also didnt rotate at all when advancing by 1 hour at a time a full half orbit. My laptop which runs 4.2.1 4073 (windows 10 64 bit) doesnt have any of these issues! Moons rotate and are shown properly. The problem machine is a desktop AMD PC Ryzen 7 something, WIndows 10 64bit. image.png (76,827 bytes) image-2.png (245,674 bytes) |
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Are you sure that in Setup / Solar system / Planet, "Transparent line mode (occultations)" is not checked? In this mode it show other objects behind the planet to make it possible to predict the reappearance at the end of the occultation. I need to remove "line mode" from the text because i was asked many years ago to also make it work with pictures. |
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That has fixed the visibility of the moons infront of/behind planet! But the moons still dont rotate when advancing time..... |
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What time step are you using? For example Titan rotation period is 16 days (same as orbital period), this make a 1 hour step just visible at high zoom level. Same for the Galilean moon of Jupiter that are also all synchronous. So it is expect that for all this satellites almost no rotation is visible during the time they are in front of the planet. Try the following: - set projection to equatorial - search Titan - menu Window / Lock on Titan - zoom so Titan fill half the screen - set time step to the default 1 hour - click the button Increment time, repeat |
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Usually an hour. Ive followed Galilean moons for a half orbit; no rotation. I do a lot of high-res planetary imaging so I'm au-fait with how it should be! What youre describing is precisely how Ive done it, though usually with Io/Ganymede as I dont much care about which face of Titan is visible! But same result for Titan as I just verified. |
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Example; locked on Ganymede. Advance by 86 hours (1/2 an orbit). Same face of Ganymede. image-3.png (329,966 bytes) image-4.png (457,390 bytes) |
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Can you look in directory %LOCALAPPDATA%\skychart\tmp for the file planet.png. Is it updated when you change the date? I put in attachment the files I have at the date from your previous screenshot. Do you get the same? ganymede-20260128.png (14,873 bytes) ganymede-20260201.png (15,126 bytes) |
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I just have this 'info.png' from around the right time. info.png (52,532 bytes) image-5.png (51,862 bytes) |
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And this is 'planet.png' but perhaps its been overwritten. will try to recreate. planet.png (153,263 bytes) |
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Its very odd. I locked on Ganymede and advanced 5 hour steps. Ganymede didnt change at all until Jupiter entered the field of view, when planet.png updated in the tmp/ folder from an image of ganymede to one of jupiter. And Ganymede rotated in the CdC. After that, Ganymede rotated each +5 hour, until it stopped again. |
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If you want to have a poke around using teamviewer or something, you're very welcome. |
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Yes there is something strange. Can you look at the date of the file planet.png after ganymede stop rotating (without displaying another planet) , do the date still increase ? Normally the files planet.png, origin.txt must have the same date, origin.txt contain the date the planet image was requested. The file tmp.config must change when you change from one satellite to another. When ganymede do no more rotate can you zip the full content of the tmp directory and upload here. info.png is only made to show in the detail information window when you click on the label. Also do Jupiter for example rotate normally ? |
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I'm locked on Ganymede and changing the time, Ganymede isnt rotating. Planet.png still shows Jupiter from when Ganymede moved past it - it showed Ganymede until then. origin.txt is updating, but not planet.png. image-6.png (74,628 bytes) |
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I make a special testing version that log more information. Please do the following: - download https://vega.ap-i.net/tmp/skychart/skychart.zip - unzip to a temporary directory - copy skychart.exe to Program Files\Ciel\ After each creation (or tentative) of a new planet.png there is now a file planet.png.log with all the detail. Send me this file planet.png.log when planet.png is not updating as you describe in previous message. |
- Anonymous
