Chandrayaan 3 lander and rover, India's lunar mission to replace Chandrayaan 2's lander/rover Options

[Ohsin]

TLI burn conducted successfully!

Chandrayaan-3 Mission:
Chandrayaan-3 completes its orbits around the Earth and heads towards the Moon.
A successful perigee-firing performed at ISTRAC, ISRO has injected the spacecraft into the translunar orbit.
Next stop: the Moon ��
As it arrives at the moon, the Lunar-Orbit Insertion (LOI) is planned for Aug 5, 2023.

https://twitter.com/isro/status/1686089881875775488

Edit:
https://twitter.com/isro/status/1686327939280035840

Chandrayaan-3 Mission:
The spacecraft’s health is normal.
Today’s perigee burn has successfully raised Chandrayaan-3 orbit to 288 km x 369328 km.
In this orbit, the spacecraft enters the moon’s sphere of influence.
A crucial maneuvre at perilune would achieve the Lunar Orbit Injection (LOI).

[Ohsin]

https://twitter.com/isro/status/1687859829803466753

https://www.isro.gov.in/Ch3_Lunar_Orbit_Ins...ss_Release.html

August 5, 2023

Chandrayaan-3 Mission: Update

Today, the Chandrayaan-3 mission achieved a crucial milestone with the successful completion of the Lunar Orbit Insertion (LOI). The insertion was carried out by retro-burning at the Perilune for 1835 seconds, starting at 19:12 Hrs. IST. The maneuver resulted in an orbit of 164 km x 18074 km, as intended.

This is the third time in succession that ISRO has successfully inserted its spacecraft into the lunar orbit, apart from doing so once into the Martian orbit.

As the mission progresses, a series of maneuvers have been planned to gradually reduce Chandrayaan-3's orbit and position it over the lunar poles. After some manevres, the propulsion module will separate from the lander while in orbit. Following that, a series of complex braking maneuvers will be executed to facilitate a soft landing in the South Polar region of the Moon on August 23, 2023. The health of Chandrayaan-3 is normal. Throughout the mission, the health of the spacecraft is being continuously monitored from the Mission Operations Complex (MOX) at ISRO Telemetry, Tracking, and Command Network (ISTRAC), the Indian Deep Space Network (IDSN) antenna at Byalalu, near Bengaluru, with the support from ESA and JPL Deep space antenna.

The next Lunar bound orbit maneuver is scheduled for August 6, 2023, between 22:30 and 23:30 Hrs. IST.

[Ohsin]

Thanks to reddit user u/isrosene for noticing this presentation, goldmine of details on Chandrayaan-3 that will interest everyone here.

Talk by "Chandrayaan-3: ISRO's Moon Exploration" by S Somanath (Chairman, ISRO) (6 August 2023)

https://www.youtube.com/watch?v=fZ2sNRP1opY

[Hungry4info]

Chandrayaan-3 enters Lunar orbit (video/animation)
https://twitter.com/TitaniumSV5/status/1688212003016577024

Attached are a couple of the frames to give you an idea of how the animation goes.

Attached thumbnail(s)

 

[Ohsin]

Chandrayaan-3 enters Lunar orbit (video/animation)
https://twitter.com/TitaniumSV5/status/1688212003016577024

Attached are a couple of the frames to give you an idea of how the animation goes.

Direct links are better:
https://www.isro.gov.in/Ch3_Video_Lunar_Orbit_Insertion.html [MP4]


https://twitter.com/isro/status/1688248504458846208

Chandrayaan-3 Mission:
The spacecraft successfully underwent a planned orbit reduction maneuver. The retrofiring of engines brought it closer to the Moon's surface, now to 170 km x 4313 km.

The next operation to further reduce the orbit is scheduled for August 9, 2023, between 13:00 and 14:00 Hrs. IST.

[Ohsin]

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.

Attached thumbnail(s)

 

[Hungry4info]

Update from ISRO on Chandrayaan 3.

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

[Ohsin]

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

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

[nogal]

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

[nogal]

New update from ISRO's twitter


Edit: Ah I see I'm late to this. Please delete. Sorry, Nogal, USFM staff.

Better twice than never!

[Hungry4info]

Update from ISRO on their twitter. Propulsion module has separated.

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.

[Ohsin]

https://twitter.com/isro/status/1692484515963588645

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:

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

Chandrayaan-3 Mission: Moon as captured by the Lander Position Detection Camera (LPDC) on August 15, 2023

https://twitter.com/isro/status/1692474762369626329

[Quetzalcoatl]

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

[kenny]

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

Attached thumbnail(s)

 

[nogal]

From X (formerly Twitter)

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

Link: https://twitter.com/isro/status/1692995757413192015
Note: 17:45 IST is 12:15 UTC

Fernando