Chandrayaan-2 : Updates

It is on the near side.. But would still be difficult to take any meaningful pic from Earth.. the orbiter might try to get nearer like a 30 km perigee orbit.. but this might compromise its other missions..

I was banned from PDF because I referred to some people as clowns for not understanding the concept of line of sight. The reason is because Pakistanis are exempted from the laws of physics. The Pakistani Hooble telescoop can see everything.
 
Sure, it is the mass - 1.4 ton Lander under moon's Gravity which is 1/6th of Earth's

Mass is constant. The weight can change. Also the lander would have used up most of its fuel load during the process of landing. So it's in fact much more lighter than just 200Kg, probably half that weight.
 
  • Agree
Reactions: Guynextdoor
You think so? All control algorithms are based on PID foundation and their advanced derivatives. Why do you think there were several rockets losing their balance during lift off - due to less or more power, and incorrect vector control. We should have sent those scientists to redo class 11


Rocket launch failure may attribute to many parameters, fuel leak, bad navi, engine failure, tress deformation, temp induced fracture, etc. To my understanding it's the software glitch and mapping error.


Only a miracle can make it happen. And if it to happen it will happen on 13th onwards.

ISRO said hard landing and not crash landing , much difference. Why would they try to contact if it was a crash???
I would consider any landing beyond a certain threshold limit where there is point of no revival as crash landing.
 
Mass is constant. The weight can change. Also the lander would have used up most of its fuel load during the process of landing. So it's in fact much more lighter than just 200Kg, probably half that weight.

1471 kg cannot be the mass. else it would be weighing 14710 kg on earth. Obviously 1471 kg is the weight on earth. On moon it will weigh 243 kilos minus the weight of whatever fuel used up.
 
Kal Mangalwar hai. My Lord Hanuman will do the needful. The orbiter is supposed to come to same spot on Moon after three days due to its orbit. Tomorrow will be that day and I expect a connect with Vikram.
 
  • Like
Reactions: Guynextdoor

I already said this few posts back that it landed on some hill not thousand meters but yes, it landed on some high terrain.

this means it landed hard because some surface suddenly appeared close ' terrain terrain' due to automated change in trajectory to find suitable place to land.

There is no reason other than false mapping to suddenly change the trajectory land 500m before and few thousand meters above the landing zone .
 
On hindsight i think ISRO could have opted for a safer landing area, instead of the uncharted south Pole, for the first landing mission. We could have gone for riskier regions for the next mission...
If we went for a safer landing we would still be re-inventing the wheel, if all went well. That's not what ISRO wanted. They wanted to land on the south pole to study a previously unexplored part of the Moon.

It was always going to be difficult and as we now see the lander is not likely to do much science. But it was still as decision they made consciously, being well aware of the dangers. It was risky no doubt, but still commendable.
 
If we went for a safer landing we would still be re-inventing the wheel, if all went well. That's not what ISRO wanted. They wanted to land on the south pole to study a previously unexplored part of the Moon.

It was always going to be difficult and as we now see the lander is not likely to do much science. But it was still as decision they made consciously, being well aware of the dangers. It was risky no doubt, but still commendable.

Well no point in brooding over spilled milk. With two missions failing in south pole, wonder if the Americans have any misgivings on landing at the south pole for their Artemis mission. Are they planning on sending an unmanned probe to the region prior to the manned landing.
 
Don't know. Don't follow American space projects. Let's ask the Americans here. Let me tag @Milspec @Paro @Ginvincible

@S. A. T. A

I don't think NASA is working on a lunar rover at the moment, just orbiting probes and systems to support a manned mission. Right now NASA has its hands tied up with the Mars 2020 rover planned for launch next year. The lunar focused Artemis missions starting next year are really just a test of the Space Launch System (SLS) that NASA has poured a lot of resources (over $14B!!) into making operational. They are just trying to validate the new launch vehicle and test technologies for future manned and deep space missions. So I don't think there will be much immediate movement from NASA on a thorough investigation of the lunar south pole :(


There are a few university level programs to study the area though. On the Artemis-1 mission there is a cubesat dubbed the Lunar Polar Hydrogen Mapper (aka LunaH-Map) from Arizona State University that plans on mapping the hydrogen within craters near the lunar south pole. But honestly, the merit from this project is demonstrating the newer technologies of cubesats that will allow them to operate on deep space missions.

The NASA website does a good job giving an overview of the projects they are prioritizing.

There is also the upcoming Chinese mission to the moon, the Chang'e 5, which should launch later this year. It won't land near the poles but, after the Israeli and Indian mission failures a Chinese success would be welcome from the space enthusiast community haha.
 

Attachments

  • 1568229524991.png
    1568229524991.png
    235.1 KB · Views: 243
Rocket launch failure may attribute to many parameters, fuel leak, bad navi, engine failure, tress deformation, temp induced fracture, etc. To my understanding it's the software glitch and mapping error.



Only a miracle can make it happen. And if it to happen it will happen on 13th onwards.

Just wondering. Whats so special about 13th?
 
On hindsight i think ISRO could have opted for a safer landing area, instead of the uncharted south Pole, for the first landing mission. We could have gone for riskier regions for the next mission...

In its next mission, ISRO should send two landers, one near the equator and another to the south pole. This way, ISRO can identify some anomalies in moon's gravity and magnetic fields around the south pole.