IPB

Welcome Guest ( Log In | Register )

6 Pages V  < 1 2 3 4 > »   
Reply to this topicStart new topic
MASCOT landing on Ryugu, 3 October 2018
Guest_mcmcmc_*
post Oct 3 2018, 08:48 AM
Post #16





Guests






image!

https://twitter.com/MASCOT2018/status/1047406828617965568
Go to the top of the page
 
+Quote Post
neo56
post Oct 3 2018, 08:48 AM
Post #17


Member
***

Group: Members
Posts: 523
Joined: 3-June 04
From: Brittany, France
Member No.: 79



JAXA just released the picture on its MASCOT lander feed: we even see the shadow of MASCOT ohmy.gif


Attached Image


--------------------
Go to the top of the page
 
+Quote Post
Guest_mcmcmc_*
post Oct 3 2018, 09:02 AM
Post #18





Guests






QUOTE (neo56 @ Oct 3 2018, 08:48 AM) *
JAXA just released the picture on its MASCOT lander feed: we even see the shadow of MASCOT ohmy.gif


Attached Image

Released where? I found this image, but 180° rotated, on MASCOT2018 Twitter feed.
Go to the top of the page
 
+Quote Post
Gerald
post Oct 3 2018, 11:33 AM
Post #19


Senior Member
****

Group: Members
Posts: 2279
Joined: 7-December 12
Member No.: 6780



Press conference is continuing on YouTube.
There will be two more updates in 2 resp. 4 hours from now.
Go to the top of the page
 
+Quote Post
Gerald
post Oct 3 2018, 11:36 AM
Post #20


Senior Member
****

Group: Members
Posts: 2279
Joined: 7-December 12
Member No.: 6780



Mascot is fine after initial issues.
Performing night sequences, all instruments are working.
Go to the top of the page
 
+Quote Post
Gerald
post Oct 3 2018, 01:46 PM
Post #21


Senior Member
****

Group: Members
Posts: 2279
Joined: 7-December 12
Member No.: 6780



"short delay - stay tuned"
Go to the top of the page
 
+Quote Post
Weywot
post Oct 3 2018, 01:47 PM
Post #22


Junior Member
**

Group: Members
Posts: 22
Joined: 15-November 14
Member No.: 7320



https://twitter.com/MASCOT2018/status/1047456139024261121

The team seems very confident in the hopping and uprighting mechanism. The found the first landung spot too dark and unstable, so commanded a first hop at the beginning of the first sol, to begin the science sequence at another location.

Next press conference has a delay but should beginn soon.
Go to the top of the page
 
+Quote Post
Gerald
post Oct 3 2018, 01:57 PM
Post #23


Senior Member
****

Group: Members
Posts: 2279
Joined: 7-December 12
Member No.: 6780



live again...
Go to the top of the page
 
+Quote Post
Gerald
post Oct 3 2018, 02:01 PM
Post #24


Senior Member
****

Group: Members
Posts: 2279
Joined: 7-December 12
Member No.: 6780



They had to make an important decision. Therefore the delay.

Spectrometer needs to be in contact with the surface.

Radiometer will tell about thermal conductivity.
Important for deflection of asteroids: What's the arrangement of grains?

Magnetometer: Extremely sensitive, seeing separation, and operation of instruments. Magnetic field data to be cleaned from those instrument operation fields.
They're going to be tired and will drink a beer this evening. Tomorrow, and until Friday, they'll take a look at the data. A first draft of evaluation will take a few more days of computation. But complete evaluaton will take years.
Go to the top of the page
 
+Quote Post
Weywot
post Oct 3 2018, 02:19 PM
Post #25


Junior Member
**

Group: Members
Posts: 22
Joined: 15-November 14
Member No.: 7320



Also interesting: Magentometer team decided to switch off the instrument to safe power, as the have enough data. Let's hope the second sol goes well. The estimate of 16 h battery time probably does not allow for surviving a third night.
Go to the top of the page
 
+Quote Post
Guest_mcmcmc_*
post Oct 3 2018, 03:04 PM
Post #26





Guests







I read that expected battery life is just 16 hours and it's not rechargeable (no solar panels), and delivery occurred at around 02:17 GMT.
So MASCOT mission should come to its end at around 18:17 GMT, 3 hours from now.
Go to the top of the page
 
+Quote Post
Weywot
post Oct 3 2018, 03:10 PM
Post #27


Junior Member
**

Group: Members
Posts: 22
Joined: 15-November 14
Member No.: 7320



Indeed. There will be another press conference in 25 min, maybe they tell us more about the expected life time of the battery. I think it is targeted to last at least two sols in the worst case. Also in the grphic from JAXA, end of mission (EOM) is during the third night. Let's hope for the best, and that the DLR team as uploaded a energy saving program for the third night, so MASCOT may have the chance to upload the data in the next morning, if it survives.
Otherwise the last hours in the night without contact are wasted.

The technical reason is the mass constraint. With just 10 kg, solar panels and rechargables are just too heavy. Rechargables and do not have the energy density compared to non-rechargable batteries. Also, the location MASCOT finally settles was unknown, so no sun light guaranteed. And as we have seen with Philae, if the additional power from solar is required for the science goal, this just adds to the risk.
Go to the top of the page
 
+Quote Post
neo56
post Oct 3 2018, 07:18 PM
Post #28


Member
***

Group: Members
Posts: 523
Joined: 3-June 04
From: Brittany, France
Member No.: 79



I added a scale to the first picture we have from MASCOT, and Buzz Aldrin to better figure out the scale (like Mystery Man of fredk wink.gif )
The altitude at which this picture was taken in 25 m and not 40 m as it was previously stated.

Attached Image


--------------------
Go to the top of the page
 
+Quote Post
Weywot
post Oct 3 2018, 08:49 PM
Post #29


Junior Member
**

Group: Members
Posts: 22
Joined: 15-November 14
Member No.: 7320



Very nice, those are some big bolders. And again, shadows in the "right" direction makes it so much easier to grasp for my brain.

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

JAXA press conference for MASCOT with english translation.
Go to the top of the page
 
+Quote Post
nprev
post Oct 3 2018, 10:52 PM
Post #30


Senior Member
****

Group: Admin
Posts: 8420
Joined: 8-December 05
From: Los Angeles
Member No.: 602



QUOTE (neo56 @ Oct 3 2018, 11:18 AM) *
I added a scale to the first picture we have from MASCOT, and Buzz Aldrin to better figure out the scale (like Mystery Man of fredk wink.gif )


The official unit of all future photographic scale references on Ryugu is now the "Aldrin". laugh.gif


--------------------
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.
Go to the top of the page
 
+Quote Post

6 Pages V  < 1 2 3 4 > » 
Reply to this topicStart new topic

 



RSS Lo-Fi Version Time is now: 3rd April 2020 - 08:32 PM
RULES AND GUIDELINES
Please read the Forum Rules and Guidelines before posting.

IMAGE COPYRIGHT
Images posted on UnmannedSpaceflight.com may be copyrighted. Do not reproduce without permission. Read here for further information on space images and copyright.

OPINIONS AND MODERATION
Opinions expressed on UnmannedSpaceflight.com are those of the individual posters and do not necessarily reflect the opinions of UnmannedSpaceflight.com or The Planetary Society. The all-volunteer UnmannedSpaceflight.com moderation team is wholly independent of The Planetary Society. The Planetary Society has no influence over decisions made by the UnmannedSpaceflight.com moderators.
SUPPORT THE FORUM
Unmannedspaceflight.com is a project of the Planetary Society and is funded by donations from visitors and members. Help keep this forum up and running by contributing here.