I prepared the landing profile for CY3 based on data from IISc talk. There is some discrepancy about whether descent after retargetting is 38s or 32s long, will fix if it clears up.
https://commons.wikimedia.org/wiki/File:Cha...ent_Profile.svg
Edit: Adding new data source slide, that I found later.
Full Version: Chandrayaan 3 lander and rover
Update from ISRO on Chandrayaan 3.
https://twitter.com/isro/status/1689192034916265984
QUOTE
Even closer to the moon’s surface. Chandrayaan-3's orbit is reduced to 174 km x 1437 km following a manuevre performed today. The next operation is scheduled for August 14, 2023, between 11:30 and 12:30 Hrs. IST
https://twitter.com/isro/status/1689192034916265984
QUOTE
Orbit circularisation phase commences. Precise maneuvre performed today has achieved a near-circular orbit of 150 km x 177 km. The next operation is planned for August 16, 2023, around 0830 Hrs. IST
https://twitter.com/isro/status/1690978432321269760
QUOTE
The mission is in the orbit circularisation phase. The spacecraft is in 151 km x 179 km orbit
https://www.isro.gov.in/Chandrayaan3.html
Today, Chandrayaan-3 successfully completed the lunar orbit lowering program.
It is now in a 153 km by 163 km orbit. The Lander Module is expected to separate from the Propulsion tomorrow, August 17.
Source: tweet (X) from ISRO - https://twitter.com/isro/status/1691655268449603770
See also the Wikipedia article, which was good information, including a table with the orbital maneuvers.
Fernando
It is now in a 153 km by 163 km orbit. The Lander Module is expected to separate from the Propulsion tomorrow, August 17.
Source: tweet (X) from ISRO - https://twitter.com/isro/status/1691655268449603770
See also the Wikipedia article, which was good information, including a table with the orbital maneuvers.
Fernando
QUOTE (Hungry4info @ Aug 16 2023, 12:59 PM) 
New update from ISRO's twitter
Edit: Ah I see I'm late to this. Please delete. Sorry, Nogal, USFM staff.
Edit: Ah I see I'm late to this. Please delete. Sorry, Nogal, USFM staff.
Better twice than never!
Update from ISRO on their twitter. Propulsion module has separated.
QUOTE
LM is successfully separated from the Propulsion Module (PM). LM is set to descend to a slightly lower orbit upon a deboosting planned for tomorrow around 1600 Hrs., IST.
https://twitter.com/isro/status/1692484515963588645
Few videos from onboard cameras:
https://twitter.com/isro/status/1692476417093890282
https://twitter.com/isro/status/1692474762369626329
QUOTE
Chandrayaan-3 Mission: The Lander Module (LM) health is normal. LM successfully underwent a deboosting operation that reduced its orbit to 113 km x 157 km. The second deboosting operation is scheduled for August 20, 2023, around 0200 Hrs. IST
Few videos from onboard cameras:
QUOTE
Chandrayaan-3 Mission: View from the Lander Imager (LI) Camera-1 on August 17, 2023 just after the separation of the Lander Module from the Propulsion Module
https://twitter.com/isro/status/1692476417093890282
QUOTE
Chandrayaan-3 Mission: Moon as captured by the Lander Position Detection Camera (LPDC) on August 15, 2023
https://twitter.com/isro/status/1692474762369626329
Bonjour,
https://www.isro.gov.in/Chandrayaan3.html
The Lander is in an orbit of 113 km x 157 km around the moon. A second setback is scheduled for 20 August 2023
https://www.isro.gov.in/Chandrayaan3.html
The Lander is in an orbit of 113 km x 157 km around the moon. A second setback is scheduled for 20 August 2023
Not the best photo of a spacecraft we have ever seen, but nevertheless interesting, I think.
View of the departing propulsion module in lunar orbit photographed by the lander.
In the original, you can see the faintly lit curved lunar horizon in the upper part of the image.
ISRO CAPTION:
Chandrayaan-3 Mission:
View from the Lander Imager (LI) Camera-1
on August 17, 2023
just after the separation of the Lander Module from the Propulsion Module
Click to view attachment
View of the departing propulsion module in lunar orbit photographed by the lander.
In the original, you can see the faintly lit curved lunar horizon in the upper part of the image.
ISRO CAPTION:
Chandrayaan-3 Mission:
View from the Lander Imager (LI) Camera-1
on August 17, 2023
just after the separation of the Lander Module from the Propulsion Module
Click to view attachment
From X (formerly Twitter)
QUOTE
The second and final deboosting operation has successfully reduced the LM orbit to 25 km x 134 km.
The module would undergo internal checks and await the sun-rise at the designated landing site.
The powered descent is expected to commence on August 23, 2023, around 1745 Hrs. IST
The module would undergo internal checks and await the sun-rise at the designated landing site.
The powered descent is expected to commence on August 23, 2023, around 1745 Hrs. IST
Link: https://twitter.com/isro/status/1692995757413192015
Note: 17:45 IST is 12:15 UTC
Fernando
https://twitter.com/isro/status/1693181653273940240
18:04 IST being 12:34 UTC
https://www.youtube.com/watch?v=DLA_64yz8Ss
QUOTE
Chandrayaan-3 is set to land on the moon on August 23, 2023, around 18:04 Hrs. IST.
18:04 IST being 12:34 UTC
https://www.youtube.com/watch?v=DLA_64yz8Ss
https://economictimes.indiatimes.com/news/i...w/102915421.cms
Quote by Nilesh M Desai, Director of Space Applications Centre-ISRO
Edit:
Just to add. Attempt in September is also possible if 27 August is also no go.
https://www.thehindu.com/sci-tech/science/c...cle67214558.ece
But keeping in mind landing site feature details are already stored on Lander, perhaps they'll try same sites again. It would be quite a big deal if they characterize and choose totally new sites and remotely reconfigure lander for it..
Quote by Nilesh M Desai, Director of Space Applications Centre-ISRO
QUOTE
“On August 23, two hours before Chandrayaan-3 lands on the Moon, we will take a decision on whether or not it will be appropriate to land it at that time based on the health of the lander module and the conditions on the Moon. In case, if any factor appears to be not favourable, then we will land the module on the Moon on August 27. No problem should occur and we will be able to land the module on August 23,"
Edit:
Just to add. Attempt in September is also possible if 27 August is also no go.
QUOTE
Mr. Somanath said that if the landing does not take place as planned on August 23, then ISRO will wait for another month to make a landing attempt in September.
https://www.thehindu.com/sci-tech/science/c...cle67214558.ece
But keeping in mind landing site feature details are already stored on Lander, perhaps they'll try same sites again. It would be quite a big deal if they characterize and choose totally new sites and remotely reconfigure lander for it..
https://twitter.com/isro/status/1693879632481935555
Comments by Nilesh M Desai, Director, SAC here at 3 minute mark onwards suggests Rough Braking Phase will be with four engines ON as expected but during Fine Braking Phase and onwards only two engines will be kept ON.
https://www.youtube.com/watch?v=3HLB4GrE2do&t=182s
QUOTE
Chandrayaan-3 Mission: The mission is on schedule. Systems are undergoing regular checks. Smooth sailing is continuing.
The Mission Operations Complex (MOX) is buzzed with energy & excitement!
The live telecast of the landing operations at MOX/ISTRAC begins at 17:20 Hrs. IST on August 23, 2023.
Here are the images of the moon captured by the Lander Position Detection Camera (LPDC) from an altitude of about 70 km, on August 19, 2023.
LPDC images assist the Lander Module in determining its position (latitude and longitude) by matching them against an onboard moon reference map.
The Mission Operations Complex (MOX) is buzzed with energy & excitement!
The live telecast of the landing operations at MOX/ISTRAC begins at 17:20 Hrs. IST on August 23, 2023.
Here are the images of the moon captured by the Lander Position Detection Camera (LPDC) from an altitude of about 70 km, on August 19, 2023.
LPDC images assist the Lander Module in determining its position (latitude and longitude) by matching them against an onboard moon reference map.
Comments by Nilesh M Desai, Director, SAC here at 3 minute mark onwards suggests Rough Braking Phase will be with four engines ON as expected but during Fine Braking Phase and onwards only two engines will be kept ON.
https://www.youtube.com/watch?v=3HLB4GrE2do&t=182s
A Google Moon rendition of Chandrayaan-3 landing area
In order to follow the Chandrayaan-3 lunar surface mission I created a small KMZ suitable for the Google Earth (GE) desktop version. Google Earth also has "Google Moon" and, upon opening the file, you will be prompted to switch to the moon, if it is not already open.
The ground overlay images are based on the LROC image M1421908349LE, with all credits fully given.This is a large image (~70M) so it cannot be attached here, but it can be downloaded from the following link:
https
://drive.google.com/file/d/1CDiBZ5BDHh...usp=drive_link
The attached KMZ file contains a small cutout of just the landing area.
To install the attached file, download it to your hard drive. I suggest the creation of a dedicated directory to contain the file. Optionally, download and place in the same directory the image linked to above.
Double click on the KMZ to open it. Click on the features (GE's left panel) to see the comments, and double click them to "fly" to that location.
Click to view attachment
I ask you to kindly let me know of any problems you may encounter. Thank you.
Fernando
In order to follow the Chandrayaan-3 lunar surface mission I created a small KMZ suitable for the Google Earth (GE) desktop version. Google Earth also has "Google Moon" and, upon opening the file, you will be prompted to switch to the moon, if it is not already open.
The ground overlay images are based on the LROC image M1421908349LE, with all credits fully given.This is a large image (~70M) so it cannot be attached here, but it can be downloaded from the following link:
https
://drive.google.com/file/d/1CDiBZ5BDHh...usp=drive_link
The attached KMZ file contains a small cutout of just the landing area.
To install the attached file, download it to your hard drive. I suggest the creation of a dedicated directory to contain the file. Optionally, download and place in the same directory the image linked to above.
Double click on the KMZ to open it. Click on the features (GE's left panel) to see the comments, and double click them to "fly" to that location.
Click to view attachment
I ask you to kindly let me know of any problems you may encounter. Thank you.
Fernando
Landing is expected around 12.34 GMT.
This seems to be one of the more informative live links (currently, anyway)
Chand-3 landing
ISRO official live link...
ISRO Chandrayaan 3 landing live
This seems to be one of the more informative live links (currently, anyway)
Chand-3 landing
ISRO official live link...
ISRO Chandrayaan 3 landing live
Stream has started. Apparently there's live imagery from the lander.
Powered descent has begun.
Live imagery from the lander.
As I write this, we're about 7 km in altitude.
Fine breaking phase! 0.45 km up.
Looks like a soft landing!
Congratulations to ISRO for what appears to be a successful landing!!! 
My understanding is that the rover is slated to deploy in about four hours.
My understanding is that the rover is slated to deploy in about four hours.
QUOTE (Explorer1 @ Aug 23 2023, 08:34 PM)
Looks like a soft landing!
Congratulations to everyone on the team.
QUOTE (nprev @ Aug 23 2023, 02:39 PM)
Congratulations to ISRO for what appears to be a successful landing!!!
My understanding is that the rover is slated to deploy in about four hours.
My understanding is that the rover is slated to deploy in about four hours.
Do we know of first pictures scheduled ?
Congratulations to India for landing on the moon!
Formidable ! exceptionnel ! félicitations à l'ISRO.
Congrats ISRO!!! Extremely emotional to follow your program, very deserved success....
An image from the surface has been taken. We can see shadows of the lander structures.
At last! Fabulous... many congrats to India on becoming the 4th country to land.
Well done ISRO!
ISRO has provided this image which is marginally better in quality than what we've seen so far.
Why does the lunar surface near the lander look mottled? Is it compression artifacts or something else?
Quickly stitched together the descent camera imagery, but without a clear idea of what the altitude / scale of the images are, it will be some time before I figure out where this is.
Video of rover deploying! (I think)
https://twitter.com/rocketgyan/status/1694383203895972327
Edit: ISRO finally shared an image.
https://twitter.com/rocketgyan/status/1694383203895972327
Edit: ISRO finally shared an image.
Rover deploying, from inside mission control.
I believe they are rushing to take the selfies...
I believe they are rushing to take the selfies...
They've convenienly landed right in one of their OHRC images:
ch2_ohr_ncp_20211023T0027462822_d_img_d18
Here's that area from that image:
Click to view attachment
ch2_ohr_ncp_20211023T0027462822_d_img_d18
Here's that area from that image:
Click to view attachment
This looks like the actual landing site to me. Shan's image above was not the actual last image because there was a lag between the images on the control room screen and the altimeter readings.
These were the last three glimpses we got in the video coverage:
Click to view attachment
and this is the area they suggest to me:
Click to view attachment
Phil
PS - the coordinates from Quickmap (a bit uncertain because of small errors in image registration) are 69.371 S, 32.324 E, and it looks like it is only about 250 to 300 m from the target point).
These were the last three glimpses we got in the video coverage:
Click to view attachment
and this is the area they suggest to me:
Click to view attachment
Phil
PS - the coordinates from Quickmap (a bit uncertain because of small errors in image registration) are 69.371 S, 32.324 E, and it looks like it is only about 250 to 300 m from the target point).
The rover's solar panel has been deployed.
Appears rover will finish it's deployment only tomorrow...
https://twitter.com/DrRichaTomar/status/1694403952413127067
https://twitter.com/DrRichaTomar/status/1694403952413127067
My updated moon sites map.
EDIT: foolish mistake... attachment removed. I will repost corrected version below. Thanks to Hungry4info, and a reminder to all that I always welcome any corrections. Don't worry about hurting my feelings, I am too old to have any left.
Phil
EDIT: foolish mistake... attachment removed. I will repost corrected version below. Thanks to Hungry4info, and a reminder to all that I always welcome any corrections. Don't worry about hurting my feelings, I am too old to have any left.
Phil
Congratulations to ISRO and the whole Chandrayaan 3 team!
My thanks to all members posting information today. Using information from several posts I updated the KMZ file. Please see post #64 for information on how to use it.
Click to view attachment
I adjusted the LROC image to GE's imagery, than adjusted the LROC cutouts to the LROC large image. It is not a perfect job, but it is difficult and time consuming.
You will notice the large distance (greater than 1km) between the announced intended location - as marked by GE - and the actual area as marked by Phil, which he estimates is 250m to 300m away. I had the same problem with Chang'e 4, more than 1km between the actual location and where GE shows a marker with the given coordinates. So please do not trust the coordinates measured on GE.
Fernando
My thanks to all members posting information today. Using information from several posts I updated the KMZ file. Please see post #64 for information on how to use it.
Click to view attachment
I adjusted the LROC image to GE's imagery, than adjusted the LROC cutouts to the LROC large image. It is not a perfect job, but it is difficult and time consuming.
You will notice the large distance (greater than 1km) between the announced intended location - as marked by GE - and the actual area as marked by Phil, which he estimates is 250m to 300m away. I had the same problem with Chang'e 4, more than 1km between the actual location and where GE shows a marker with the given coordinates. So please do not trust the coordinates measured on GE.
Fernando
Click to view attachment
CH3 landing site, best effort. Two landing ellipses are shown, earlier (in orange) and final (white). Grid at 1 km from the landing site.
CH3 landing site, best effort. Two landing ellipses are shown, earlier (in orange) and final (white). Grid at 1 km from the landing site.
Click to view attachment
Close up, grid at 100 m.
Close up, grid at 100 m.
OK, repost of my previous map of all impact and landing sites, with an important correction.
Phil
Click to view attachment
Phil
Click to view attachment
ISRO says we have a deployed rover:
https://twitter.com/isro/status/1694545322251571687
"The Ch-3 Rover ramped down from the Lander and
India took a walk on the moon !
More updates soon."
Phil
https://twitter.com/isro/status/1694545322251571687
"The Ch-3 Rover ramped down from the Lander and
India took a walk on the moon !
More updates soon."
Phil
https://twitter.com/sdhrthmp/status/1694549093455139294
That is about 7.5 hours after landing. For CY2 the timeline had this event scheduled at 3 hr 36 min after touchdown.
QUOTE
Around 1:30am IST today, the rover started leaving #indian imprints on the talcum powder-like #lunar soil
That is about 7.5 hours after landing. For CY2 the timeline had this event scheduled at 3 hr 36 min after touchdown.
Congratulations to ISRO!
But...
If those landing coordinates are correct, that is quite a long
way from the pole. I thought that at 70 south any ice would be
well below the surface. What am I missing here?
P
But...
If those landing coordinates are correct, that is quite a long
way from the pole. I thought that at 70 south any ice would be
well below the surface. What am I missing here?
P
It never was really a polar landing, despite many claims, but there is a possibility that ice (in minute quantities) may be present in the regolith, perhaps below a 'dry' zone.
Phil
Phil
http://www.unmannedspaceflight.com/index.p...st&id=53751
Hello,
thanks to Hungry4info for this mosaic.
Does anyone now have any information on the altitude at which these images were taken?
I had fun making an estimate, saying more than ten km (32 800 feet), without being able to support my claim...
QUOTE (Hungry4info @ Aug 23 2023, 04:42 PM)
Quickly stitched together the descent camera imagery, but without a clear idea of what the altitude / scale of the images are, it will be some time before I figure out where this is.
Hello,
thanks to Hungry4info for this mosaic.
Does anyone now have any information on the altitude at which these images were taken?
I had fun making an estimate, saying more than ten km (32 800 feet), without being able to support my claim...
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