Chandrayaan-II, All Chandrayaan-II related articles |
Chandrayaan-II, All Chandrayaan-II related articles |
Aug 13 2019, 11:26 PM
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#31
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Member Group: Members Posts: 122 Joined: 26-June 04 From: Austria Member No.: 89 |
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Aug 14 2019, 12:07 AM
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#32
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Member Group: Members Posts: 968 Joined: 15-June 09 From: Lisbon, Portugal Member No.: 4824 |
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Aug 20 2019, 05:23 AM
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#33
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Solar System Cartographer Group: Members Posts: 10229 Joined: 5-April 05 From: Canada Member No.: 227 |
-------------------- ... because the Solar System ain't gonna map itself.
Also to be found posting similar content on https://mastodon.social/@PhilStooke Maps for download (free PDF: https://upload.wikimedia.org/wikipedia/comm...Cartography.pdf NOTE: everything created by me which I post on UMSF is considered to be in the public domain (NOT CC, public domain) |
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Aug 22 2019, 10:30 PM
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#34
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Solar System Cartographer Group: Members Posts: 10229 Joined: 5-April 05 From: Canada Member No.: 227 |
https://www.isro.gov.in/sites/default/files...moon_photo1.png
First image of the Moon, with the Orientale basin at the top and north at upper left. Phil -------------------- ... because the Solar System ain't gonna map itself.
Also to be found posting similar content on https://mastodon.social/@PhilStooke Maps for download (free PDF: https://upload.wikimedia.org/wikipedia/comm...Cartography.pdf NOTE: everything created by me which I post on UMSF is considered to be in the public domain (NOT CC, public domain) |
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Aug 23 2019, 09:16 PM
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#35
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Member Group: Members Posts: 291 Joined: 29-December 05 From: Ottawa, ON Member No.: 624 |
https://www.isro.gov.in/sites/default/files...moon_photo1.png First image of the Moon, with the Orientale basin at the top and north at upper left. Phil That's an amazing picture. Our moon is so wonderfully diverse and interesting. I can never get bored gazing at its majesty. |
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Sep 1 2019, 04:05 PM
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#36
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Member Group: Members Posts: 157 Joined: 22-May 09 From: Ireland Member No.: 4792 |
Well, looks like all went well on the fifth manoeuvre, 1 Sept, 2019, and also an update, 2 Sept, 2019, on the successful separation of the Vikram Lander (with the Pragyan rover onboard) from the orbiter.
Below image (Credit: ISRO): a tentative plan over the next few days up to the 7 Sept, 2019...when India's engineers' nerves will undoubtedly be fraying towards a successful landing. John |
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Sep 4 2019, 01:41 AM
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#37
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Senior Member Group: Members Posts: 1075 Joined: 21-September 07 From: Québec, Canada Member No.: 3908 |
The Vikram lander has reached its final orbit (35 x 101 km) before its descent to the Lunar surface (scheduled for Sept. 7).
https://www.isro.gov.in/chandrayaan2-latest-updates |
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Sep 4 2019, 08:49 PM
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#38
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Solar System Cartographer Group: Members Posts: 10229 Joined: 5-April 05 From: Canada Member No.: 227 |
The sun is about to rise on the landing site, and the high resolution camera on the orbiter is supposed to image the site for final site planning. The resolution will be about 30 cm/pixel, better than a standard 50 cm/pixel LROC NAC image and almost as good as the low altitude images (25 cm/pixel) NAC obtained over several of the Apollo sites. It will be great to see the site before and after landing with this camera, and really nice to see images of other sites with the same camera if they are taken. For instance, LRO images of the Chang'e 4 site are about 1 m/pixel, so this camera might give us 3x better resolution. I hope the camera team plan images of other sites at that resolution.
Phil -------------------- ... because the Solar System ain't gonna map itself.
Also to be found posting similar content on https://mastodon.social/@PhilStooke Maps for download (free PDF: https://upload.wikimedia.org/wikipedia/comm...Cartography.pdf NOTE: everything created by me which I post on UMSF is considered to be in the public domain (NOT CC, public domain) |
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Sep 5 2019, 07:00 PM
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#39
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Member Group: Members Posts: 157 Joined: 22-May 09 From: Ireland Member No.: 4792 |
Below, an approximate render of the lighting conditions of the 6 Sept, 2019 (round 6.00 pm UTC )…for successful landing of Vikram. Simpelius N and Manzinus C, lie roughly at the centre of the ellipse.
John |
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Sep 6 2019, 08:11 PM
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#40
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Member Group: Members Posts: 279 Joined: 19-August 07 Member No.: 3299 |
At this moment, Vikram will start the descending trajectory shortly.
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Sep 6 2019, 08:25 PM
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#41
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Junior Member Group: Members Posts: 62 Joined: 11-July 11 Member No.: 6058 |
Live feeds not looking good; it seems the lander deviated from its trajectory in the final moments of the descent a few minutes ago. No downlink
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Sep 6 2019, 08:28 PM
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#42
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Member Group: Members Posts: 279 Joined: 19-August 07 Member No.: 3299 |
A steeper inclination than the planned trajectory indicates some failure propulsion along without a downlink signal. I am afraid that Vikram has not landed as planned, softly. The last info from the panel was that its altitude was 1 km above the surface at 59 m/s (an acceptable landing speed must not be greater than 15 m/s). The people from the operation center are uneasy trying to figure out this incident.
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Sep 6 2019, 08:39 PM
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#43
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Junior Member Group: Members Posts: 62 Joined: 11-July 11 Member No.: 6058 |
Rough luck, that. Space is hard! Hope ISRO can swiftly recover from this failure.
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Sep 6 2019, 08:48 PM
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#44
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Junior Member Group: Members Posts: 62 Joined: 11-July 11 Member No.: 6058 |
India Today's live feed reporting that all was well up to an altitude of 2.1 kilometres. Communication was lost after that. Sounds like the issue was to do with the 'fine braking' phase - a misfiring or failed engine, perhaps?
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Sep 6 2019, 09:02 PM
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#45
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Merciless Robot Group: Admin Posts: 8785 Joined: 8-December 05 From: Los Angeles Member No.: 602 |
Aaaaaaah....damn.
My most sincere sympathies to the Chandrayaan II team. There is absolutely nothing easy nor routine about landing on another world. This was a truly brilliant & ambitious effort, and though lessons learned are always painful they are always invaluable as the only real way forward to new futures. -------------------- A few will take this knowledge and use this power of a dream realized as a force for change, an impetus for further discovery to make less ancient dreams real.
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