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Yutu-2 route map
Phil Stooke
post Jun 26 2019, 07:19 PM
Post #31


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Pictures from lunar day 6, released at the start of lunar day 7, let me revise the route map. I don't really know that those images cover all the day 6 tracks or that I have joined them correctly, but this is what i have at the moment.

3 maps this time. The first is the updated version of the previous map. The other two are more detailed maps adding labels from a recent Chinese map noted in the other thread. I have changed symbols and added a legend to match previous work on Chang'e 3's route map.

Phil

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Phil Stooke
post Jul 9 2019, 08:30 PM
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This is a preliminary update based on the reprojected image shown in the other thread. I think that image is from the mid-day siesta, based on illumination, and there is no indication how far Yutu 2 has moved since then. My scaling of the new drive is only approximate. So basically it's all guesswork so far. But I am suggesting a drive on the order of 40 m on the 7th day.

Phil

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Phil Stooke
post Aug 7 2019, 05:30 PM
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Andrew Jones tweeted a total distance of 271 m after day 8 which lets me estimate a new position. Since the last map I have pulled my estimated position for the end of day 7 back a bit. This map extends the base to the west to show a sharp-rimmed crater ahead. Will it be a future target? I am trying to decide if this crater is shown as a bright band across one of the newly-released images (see discussion in the main thread).

Phil

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Phil Stooke
post Sep 18 2019, 08:59 PM
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Took a while to get this together from the latest data. As always, changes may be needed later!

Phil

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Phil Stooke
post Oct 2 2019, 10:06 PM
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A new paper in Earth and Planetary Science Letters ( Gou et al., 2019. Lunar deep materials observed by Chang'e-4 rover. Earth and Planetary Science Letters, v. 528, 115829. https://doi.org/10.1016/j.epsl.2019.115829 ) provides more details of VNIS operations. I have used it to update the more detailed version of my map.

Phil

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Phil Stooke
post Nov 5 2019, 09:29 PM
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This is my estimate of the location after the 11th day of operation. The point is chosen to give a distance from the lander of 218 m, a path in day 11 which avoids craters, and to reflect my hope that the prominent crater SW of the current position will be investigated. Needless to say, I may have to revise this when I get new images of the tracks.

My lunar night dates are a bit unreliable, but I have not found time to check the actual sunset-sunrise dates for each month. I will try to sort that out soon. I think my dates are mixing up UTC dates and dates in China, and are further messed up by my efforts to adjust them.

Also this is a composite of two maps joined together, and the join is not perfect. Mars has been interfering with the Moon in my life recently.

Phil


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