Search for Vikram

It has been about 5 days since my last post here. When we last left Vikram, we had left it incommunicado close to the surface of the Moon.

Since then, there has been a lot of speculation with little or no information. There is no information from ISRO including what it seems to be doing now. Information is coming in at a tangent, from astronomers studying Doppler readings of the Lander and the Orbiter.

ISRO’s last official update (at the time of writing) states that it had located the lander and that it was trying to establish communication with it. There was a lot of speculation initially about the status of the lander. Many foreign observers (like Jonathan McDowell, Cees Bassa, Chris B etc.)said that the lander had very little chance of survival knowing the speed at which it was travelling at the time ISRO received the last telemetry from the lander. ISRO released information to some sections of the media (PTI report ) that the lander was intact but toppled. This was not found as an update on the ISRO website.

Science reporters then began to question ISRO’s claim that the mission was 90-95% success. Vasudevan Mukunth for The Wire considered the method by which they arrived at the success rate. Jacob Koshy writes in The Hindu with much more depth and history for the reasons why this quote now looks like a way to airbrush the failure. There has been no official response yet. S M Ahmed who had an instrument on board the Moon Impact Probe of Chandrayaan 1 discusses possibilities as to the fate of the lander on his blog.

The lack of information now has people studying the few statements that ISRO has already made. A story in India Today seems to re-interpret ISRO’s message to say that they were in touch with Vikram till about 400 m above the surface of the Moon and not 2.1 km like many media reports have since claimed.

Meanwhile, Ryan Watkins, a planetary scientist tweeted that NASA’s Lunar Reconnaissance Orbiter (LRO) will look for Vikram on September 17. LRO’s camera has a resolution of 0.5 m at an orbit of 100 km. It is believed that at this altitude, the images would not discern enough detail to let us know whether the lander is intact. There were reports that ISRO will lower the orbit of the Chandrayaan 2 orbiter to take a closer look. The orbiter has a camera with a better resolution than LRO. We got word from Edgar Kaiser, an amateur radio astronomer today that Chandrayaan 2 orbiter has now lowered its orbit above the South Pole.

Chandrayaan 2 orbiter orbit change detected on Doppler. Image: Edgar Kaiser

This seems contrary to rumours that K Sivan, ISRO Chairman has asked scientists to move on and focus on future missions. There were also some fairly stupid remarks from DRDO Chairman saying that PM Modi’s hug enabled ISRO to find Vikram.

While I’ve mostly given up on chances of locating Vikram intact we can await efforts from Deep Space Network (DSN) to hail the lander in hopes that it will be able to contact it.

Doppler seems to be bursting various balloons of hope that ISRO has created. It seems to be breaking news about the orbiter and lander. In space, you can’t lie. Covering up mistakes makes the situation much worse than needs to be.

Published by Pradeep

I work in a public sector bank in Mumbai, India

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