Chethan Kumar
Chethan Kumar

@Chethan_Dash

12 تغريدة 1 قراءة Aug 21, 2023
#Update #Space #Chandrayaan3 #thread
A day after #Vikram set the stage for a controlled landing for around 6.04pm on Aug 23 by entering a pre-landing orbit of 25km x 134km, Isro released pics of the far side of #Moon.
Read thread for more... 1/n
Pics: Isro
All 4 pics taken on Aug 19, a day before #Vikram entered pre-landing orbit. @isro would now be carrying out internal checks on landing module. Powered descent is expected to commence on August 23 at around 5.45pm and Vikram is set to land on the lunar surface around 6.04pm. 2/n
@isro Explaining why landing is planned at dawn, Isro chief S Somanath had said in Jul: “...We want landing when Sun rises on Moon so we get 14-15 [Earth] days to work… ” 3/n
@isro #Vikram and #Pragyan are designed to have a life of one lunar day (14 Earth days) powered by the sun, but a life extension is not ruled out completely. 4/n
@isro Once Sun sets, there’ll be no power for lander & rover to function & all equipment will stop working. However, Isro tests have shown possibilities of battery getting recharged upon the next Sun rise. If that happens, we could get another 14 days or maybe even more. 5/n
@isro With all phases of the mission having gone nominally, Isro will attempt the landing on Aug 23, a success at which would see #Vikram descend on a pre-decided site near the lunar south pole, four years after success remained elusive to its predecessor bearing the same name. 6/n
@isro Upon landing, #Pragyan will slide down from Vikram — which will be captured by cameras on the lander — and begin to move on the lunar surface using its wheels. Pragyan is also equipped with cameras for obstacle avoidance. 7/n
@isro #Pragyan’s movement will be restricted to be within #Vikram’s observational area. As of now the movement is for 14 days and Isro will map the distance it covers. In case the life of the lander and rover gets extended, then Pragyan will travel more. 8/n
@isro In Queue To Reach #Moon: While #Vikram is just days away from landing, Russia’s #Luna25, which was scheduled to pip #Chandrayaan3 in reaching the polar region of Moon failed. 9/n
@isro But #Chandrayaan3 & #Luna25 aren’t the only lunar missions planned this decade. They are only the first among at least 10 other lunar missions planned between now and 2025, with the US, Israel, China and Japan — including a joint mission with India — all going to Moon. 10/n
@isro The US will launch CLPS, Trailblazer, VIPER & Artemis-II, China has multiple missions under CLEP, Israel is planning Beresheet-2 and Japan will launch Hakuto-II & III and SLIM independently, and Lupex (Lunar Polar Exploration) jointly with India. 11/n
@isro These missions are part of a renewed interest globally to return to Moon and efforts for a more sustained presence. Aside from these, the lunar orbit is already crowded albeit low compared to Earth orbits, posing a challenge of collisions for all lunar missions. n/n

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