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von Kármán - Chang'e-4 touchdown + updates

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#101 CeeKay

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Posted 28 July 2020 - 06:53 PM

John - thanks for the updates!

 

Chris


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#102 John_Moore

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Posted 26 August 2020 - 09:21 AM

Lunar day 21 ends today for both the Lander and the Rover. Yutu-2 travelled some 28.39 metres during day 21, bringing the total distance travelled to date to 519.29 metres.

 

John More



#103 John_Moore

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Posted 03 September 2020 - 05:04 AM

While both Lander and Rover are currently in sleep mode having finished the 21st lunar day on the farside, thanks to Andrew Jones (Journalist tracking China's space programme) for this tweet; showing a wonderful panoramic view from the Lander (for a large view, see here). 

 

John Moore

 

Image credit: CLEP/GRAS

 

Panorama Chang'e 4

Edited by John_Moore, 03 September 2020 - 04:14 PM.


#104 John_Moore

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Posted 06 September 2020 - 11:29 AM

A recently-released paper concerning the age of Finsen crater, which lies some 140 km northeastwards from the Chang'e-4 Lander and Rover in Von Kármán, suggests it to be slightly older than previously expected by 3.5 billions (Ga) years.

 

But why report here about a crater that has nothing to do with the Chang'e-4 mission. The thing it, that is does, because both the Lander and Rover currently lie, and work, on primary-sourced ejecta from the crater Finsen.

 

Radar images suggests the Finsen ejecta (and subsequent regolith build-up by continuous impacting and gardening of the lunar surface) at the Chang'e-4 landing site is about 12 metres thick, with an estimated average growth rate of round 3.4 m/Gyr.

 

Free and full access to the complete Icarus paper can be found here.

 

Btw, the Yutu-2 rover and Lander are expected to begin lunar day 22 this Saturday 12 Sept 2020.

 

John Moore

 

Image credit: Article authors Sheng Gou et al.

 

FinsenEjecta VonKarman

Edited by John_Moore, 07 September 2020 - 04:59 AM.

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#105 John_Moore

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Posted 14 September 2020 - 10:34 PM

Two recently-released images from the Yutu-2 rover show (left) 'skewed' track marks by it, while (right) a small impact crater with even smaller ones within it.

 

Google translation of the accompanying Chinese text looks interesting:

 

"Based on data such as panoramic camera stitching images and DOM images, the "Yutu-2" lunar rover will drive towards the basalt or impact crater area with high reflectivity during the 22nd day of the month. The current detection point is about 83m from the nearest impact crater, and there is a degraded impact crater with a diameter of about 160m on the south side of the impact crater. Both locations are located to the northwest of the current detection point. The "Yutu-2" lunar rover will conduct scientific exploration of these two impact craters during the day of this month. At that time, the panoramic camera, infrared imaging spectrometer, and neutral atom detector will be turned on one after another, and the moon-measuring radar will simultaneously carry out detection during driving. Related scientific results will be released in time."

 

John Moore

 

Image credit: CLEP (Chinese Lunar Exploration Program).

 

Day21 22

Edited by John_Moore, 14 September 2020 - 10:36 PM.

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#106 John_Moore

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Posted 24 September 2020 - 04:48 AM

Both the Lander and Rover (Yutu-2) have just ended their 22nd lunar day on the farside. The rover moved some 27.88 metres during that day, bringing its total distance travelled to date from the Lander to 547.17 metres. Below, the latest image released, showing a nice crater in foreground (with several more in the distance), and a nice little boulder off to the left. The shadow from the boulder is cast eastwards, so the view from Yutu-2 must be looking northwards approximately, which is the intended direction for the next lunar day.

 

John Moore

 

Image credit: CNSA/CLEP

 

Day22 Image

Edited by John_Moore, 24 September 2020 - 04:53 AM.

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#107 John_Moore

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Posted 05 October 2020 - 05:50 AM

As always, many thanks to cartographer, Phil Stooke, for giving an update of the path the Yutu-2 Rover took to lunar day 22. Image below has been adjusted to show the route in a one view, however, Phil's original can be found here.

 

John Moore

 

Image credit: Phil Stooke

 

Yutu 2 PathUpToDay22 PhilStooke

Edited by John_Moore, 05 October 2020 - 05:51 AM.

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#108 John_Moore

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Posted 11 October 2020 - 08:16 AM

Lunar day 23 has already begun for both the Chang'e-4 Lander and Rover (Yutu-2) on the farside of the Moon.

 

From the looks of the images below, the rover's objective will be a rock on the edge of a small crater some 20 metres away (yellow line = route).

 

John Moore

PS. Preparations are also underway for the Chang'e-5 lunar sample and return mission (expected to launch in late November 2020), where its intended target will be somewhere close to Mons Rümker.

 

Top images, intended rock target (Credit: NAOC), bottom, flyover of the Rümker dome (Credit: John Moore). If all goes well, up to 2 kilograms of samples will be collected - the first since the last samples were collected back in the 1970s during the Apollo missions.

 

Day23begins 10Oct2020
 
TheRumkerDome

Edited by John_Moore, 11 October 2020 - 08:21 AM.

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