Author Topic: JAXA Hayabusa2 Mission : General Thread  (Read 45064 times)

Offline mcgyver

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Re: JAXA Hayabusa2 Mission : General Thread
« Reply #40 on: 06/19/2018 06:32 AM »
Next dates:
20/6: TCM06
22/6: TCM07
24/6: TCM08
26/6: TCM09
27/6: Arrival maneuvre

Next press releases:
27/6 (arrival at 20 km)
19/7 (5 km)
2/8 (1 km)
23/8
Source: latest press conference
« Last Edit: 06/19/2018 06:32 AM by mcgyver »

Offline yoichi

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Re: JAXA Hayabusa2 Mission : General Thread
« Reply #41 on: 06/19/2018 06:47 AM »
« Last Edit: 06/19/2018 10:19 AM by yoichi »

Offline Alpha_Centauri

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Re: JAXA Hayabusa2 Mission : General Thread
« Reply #42 on: 06/19/2018 10:45 AM »
That's no moon asteroid.






(Yes, i went there)
« Last Edit: 06/19/2018 10:45 AM by Alpha_Centauri »

Offline mcgyver

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Re: JAXA Hayabusa2 Mission : General Thread
« Reply #43 on: 06/19/2018 02:16 PM »

Offline vaporcobra

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Re: JAXA Hayabusa2 Mission : General Thread
« Reply #44 on: 06/20/2018 03:30 AM »
Less than 100km out!

Offline mcgyver

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Re: JAXA Hayabusa2 Mission : General Thread
« Reply #45 on: 06/20/2018 06:49 AM »
Planned correction maneuvres, taken from simulator data:



22/6: from 0.29 to 0.09 m/s at 00:30 GMT
58291.000000 2018/06/22T00:00:00.0    0.3463    0.2734   46.4971   0.010890  -0.003859  -0.299322
58291.006944 2018/06/22T00:10:00.0    0.3529    0.2711   46.3175   0.010939  -0.003867  -0.299424
58291.013888 2018/06/22T00:20:00.0    0.3594    0.2688   46.1378   0.010988  -0.003875  -0.299525
58291.020833 2018/06/22T00:30:00.0    0.3660    0.2664   45.9581  -0.002735  -0.000503  -0.091445
58291.027777 2018/06/22T00:40:00.0    0.3644    0.2661   45.9032  -0.002738  -0.000505  -0.091550
58291.034722 2018/06/22T00:50:00.0    0.3628    0.2658   45.8482  -0.002741  -0.000508  -0.091656

24/6: from 0.126 to 0.012 at 00:30 GMT:
58293.006944 2018/06/24T00:10:00.0   -0.1110    0.1121   27.4438  -0.002419  -0.001353  -0.126452
58293.013888 2018/06/24T00:20:00.0   -0.1125    0.1112   27.3679  -0.002413  -0.001356  -0.126605
58293.020833 2018/06/24T00:30:00.0   -0.1139    0.1104   27.2919   0.003327  -0.000321  -0.012317
58293.027777 2018/06/24T00:40:00.0   -0.1119    0.1102   27.2844   0.003304  -0.000322  -0.012470

26/6: from 0.061 to 0.002 at 01:10 GMT
58295.034722 2018/06/26T00:50:00.0   -0.0201    0.0277   21.0608  -0.001681  -0.000683  -0.061627
58295.041666 2018/06/26T01:00:00.0   -0.0211    0.0273   21.0237  -0.001692  -0.000685  -0.061832
58295.048611 2018/06/26T01:10:00.0   -0.0221    0.0269   20.9866   0.001988  -0.000297   0.002685
58295.055555 2018/06/26T01:20:00.0   -0.0209    0.0267   20.9881   0.001961  -0.000298   0.002481

27/6: from 0.026 to stop.
58296.006944 2018/06/27T00:10:00.0    0.0015    0.0004   20.0315  -0.001256  -0.000355  -0.026044
58296.013888 2018/06/27T00:20:00.0    0.0008    0.0002   20.0158  -0.001276  -0.000356  -0.026261
58296.020833 2018/06/27T00:30:00.0    0.0000   -0.0000   20.0000   0.000038   0.000000   0.000323
58296.027777 2018/06/27T00:40:00.0    0.0000   -0.0000   20.0001   0.000012   0.000000   0.000105

Offline mcgyver

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Re: JAXA Hayabusa2 Mission : General Thread
« Reply #46 on: 06/20/2018 12:24 PM »
Simulator data updated.
(last column is vertical speed)


TCM06
Previously:
20/6, 03:30 GMT

58289,145833 2018/06/20T03:30:00,0    -0,4074     0,7378    92,8289   0,048946  -0,019311  -0,841271
58289,152777 2018/06/20T03:40:00,0    -0,3780     0,7262    92,3241  -0,001617  -0,001874  -0,275698



Actually:
20/6 03:30 GMT

58289,145833 2018/06/20T03:30:00,0    -2,1929     1,8624   109,3749   0,036942  -0,015448  -0,734701
58289,152777 2018/06/20T03:40:00,0    -2,1707     1,8531   108,9340   0,004073  -0,007881  -0,381010



Next TCMs:

TCM07:
Previously:
22/6 00:20 GMT

58291,013888 2018/06/22T00:20:00,0     0,3594     0,2688    46,1378   0,010988  -0,003875  -0,299525
58291,020833 2018/06/22T00:30:00,0     0,3660     0,2664    45,9581  -0,002735  -0,000503  -0,091445


Now planned:
22/6 00:20 GMT

58291,013888 2018/06/22T00:20:00,0     0,0525     0,3668    45,9209   0,023751  -0,010678  -0,403516
58291,020833 2018/06/22T00:30:00,0     0,0668     0,3604    45,6787   0,000331  -0,001437  -0,090479



TCM08:
Previously:
24/6 00:30 GMT

58293,020833 2018/06/24T00:30:00,0    -0,1139     0,1104    27,2919   0,003327  -0,000321  -0,012317
58293,027777 2018/06/24T00:40:00,0    -0,1119     0,1102    27,2844   0,003304  -0,000322  -0,012470


Now planned for:
24/6 00:20 GMT

58293,013888 2018/06/24T00:20:00,0     0,1110     0,0421    27,2645   0,000560  -0,002306  -0,125539
58293,020833 2018/06/24T00:30:00,0     0,1114     0,0407    27,1891   0,002246  -0,000111  -0,011788



TCM09:
Previously:
26/6 01:00 GMT

58295,041666 2018/06/26T01:00:00,0    -0,0211     0,0273    21,0237  -0,001692  -0,000685  -0,061832
58295,048611 2018/06/26T01:10:00,0    -0,0221     0,0269    20,9866   0,001988  -0,000297   0,002685



Now planned for:
01:10 GMT[/size]

58295,041666 2018/06/26T01:00:00,0     0,0003    -0,0002    20,9940  -0,002923  -0,000412  -0,061517
58295,048611 2018/06/26T01:10:00,0    -0,0015    -0,0004    20,9570   0,001754   0,000019   0,003058


Arrival:


Previously:
27/7 00:20 GMT

58296,013888 2018/06/27T00:20:00,0     0,0008     0,0002    20,0158  -0,001276  -0,000356  -0,026261
58296,020833 2018/06/27T00:30:00,0     0,0000    -0,0000    20,0000   0,000038   0,000000   0,000323


Now planned for:
27/7 00:20 GMT

58296,013888 2018/06/27T00:20:00,0     0,0009     0,0000    20,0156  -0,001530  -0,000025  -0,025922
58296,020833 2018/06/27T00:30:00,0     0,0000    -0,0000    20,0000   0,000038   0,000000   0,000323

Offline yoichi

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Re: JAXA Hayabusa2 Mission : General Thread
« Reply #47 on: 06/21/2018 04:53 AM »


Online theinternetftw

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Re: JAXA Hayabusa2 Mission : General Thread
« Reply #48 on: 06/21/2018 05:56 AM »
Quick loop of the approach.
« Last Edit: 06/21/2018 08:29 PM by theinternetftw »

Offline mcgyver

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Re: JAXA Hayabusa2 Mission : General Thread
« Reply #49 on: 06/21/2018 06:25 AM »
Now Ryugu is officially "down there" rather than "up there":



Quote
From now on, the asteroid's gravity will dominate the area (Hill area: within about 90 km from the asteroid) will enter!
[/size]
https://twitter.com/haya2_jaxa/status/1009368813429592064

Offline mcgyver

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Re: JAXA Hayabusa2 Mission : General Thread
« Reply #50 on: 06/21/2018 07:08 AM »
Press conference outcome (in japanese, just wait 1 day for English translation):
http://fanfun.jaxa.jp/jaxatv/files/20180621_hayabusa2.pdf


Offline mcgyver

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Re: JAXA Hayabusa2 Mission : General Thread
« Reply #52 on: 06/21/2018 01:23 PM »
Hot spot on Ryugu:



I am beginning to think that asteroids and comets are not different types of bodies, but same bodies with different types of orbits.


In other words: water and ice are everywhere in the Solar System.


Online Stan-1967

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Re: JAXA Hayabusa2 Mission : General Thread
« Reply #53 on: 06/21/2018 01:27 PM »
It's a bit early to make any comparison to the white spots on Ceres.  Certainly looks like an interesting body, but the albedo variations could very well have a simple explanation like being from a more recent impact event vs. the salt deposits found as the source of Ceres bright spots.

Great job JAXA getting this mission to it's destination!

Offline Svetoslav

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Re: JAXA Hayabusa2 Mission : General Thread
« Reply #54 on: 06/21/2018 01:30 PM »
Deleted my post from the update thread, reposting here:

Quote
Oh my, we see a Ceres moment on Ryugu - white spots!

And knowing this asteroid is less than 1km in diameter, that's quite surprising.
« Last Edit: 06/21/2018 01:30 PM by Svetoslav »

Offline mcgyver

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Re: JAXA Hayabusa2 Mission : General Thread
« Reply #55 on: 06/22/2018 06:43 AM »
Could anybody please add a link to update thread in first post?
Anybody?

Offline mcgyver

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Re: JAXA Hayabusa2 Mission : General Thread
« Reply #56 on: 06/22/2018 07:16 AM »
TCM07 confirmed:
Quote
Our 7th Trajectory Control Manoeuvre (TCM07) for optical navigation was made on June 22, 2018 from around 09:30~10:40 JST. Thrusters game a velocity change of 2 cm/s (-x), 1 cm/s (+y) and 31 cm/s (+z). The distance from the spacecraft to Ryugu at the TCM was 45 km.


https://twitter.com/haya2e_jaxa/status/1010032948697956352
200 pixel in ONC-T, 20 pixel in ONC-W, 4.5 m/pixel and 45 m/pixel resolutions.

Offline yoichi

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Re: JAXA Hayabusa2 Mission : General Thread
« Reply #57 on: 06/24/2018 05:44 AM »
https://twitter.com/haya2e_jaxa/status/1010759732515098625

[email protected]‏ @haya2e_jaxa

Our 8th Trajectory Control Manoeuvre (TMC08) for optical navigation was made on June 24, 2018 from ~09:30-09:40 JST. Trusters gave a velocity change of ~0.2cm/3 (+y), 2cm/s (+z). The distance to Ryugu from Hayabusa2 was 38km & the relative speed after TCM08 was ~0.08 m/s (8 cm/s)

Offline mcgyver

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Re: JAXA Hayabusa2 Mission : General Thread
« Reply #58 on: 06/24/2018 10:27 AM »

TCM08 confirmed but different from planned:
Quote
Our 8th Trajectory Control Manoeuvre (TMC08) for optical navigation was made on June 24, 2018 from ~09:30-09:40 JST. Trusters gave a velocity change of ~0.2cm/3 (+y), 2cm/s (+z). The distance to Ryugu from Hayabusa2 was 38km & the relative speed after TCM08 was ~0.08 m/s (8 cm/s)
https://twitter.com/haya2e_jaxa/status/1010759732515098625
Planned:
58293,013888 2018/06/24T00:20:00,0 -0,0541 0,1376 27,1238 0,001939 -0,002281 -0,123958
58293,020833 2018/06/24T00:30:00,0 -0,0529 0,1363 27,0494 0,002306 -0,000590 -0,010717
Actual:
58293.018055 2018/06/24T00:26:00.0    -0.1998     0.2395    38.3500   0.002254  -0.002601  -0.106281
58293.025000 2018/06/24T00:36:00.0    -0.1991     0.2386    38.2940   0.000540  -0.000687  -0.084732
Hence, new TCM added on 26/6:
58295.045833 2018/06/26T01:06:00.0    -0.1652     0.0514    21.0219   0.000191  -0.001503  -0.114487
58295.052777 2018/06/26T01:16:00.0    -0.1638     0.0508    20.9933   0.003624  -0.000580  -0.003281

Final TCM on 27/7 as planned:
58296.018055 2018/06/27T00:26:00.0    -0.0001     0.0002    20.0049   0.000394  -0.000642  -0.020535
58296.025000 2018/06/27T00:36:00.0     0.0000    -0.0000    20.0001   0.000022   0.000000   0.000111

(but actually after TCM08bis the speed will bealready just 3 mm/s)

No new images yet.
No English translation of latest press release yet:
http://www.hayabusa2.jaxa.jp/topics/press/




Next steps after final maneuvre:


Offline yoichi

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Re: JAXA Hayabusa2 Mission : General Thread
« Reply #59 on: 06/25/2018 06:58 AM »
http://www.hayabusa2.jaxa.jp/topics/20180625je/index_e.html

Asteroid Ryugu seen from a distance of around 40km

Figure 2 shows Ryugu photographed with the ONC-T (Optical Navigation Camera - Telescopic) on June 24, at around 00:01 JST. The appearance of the surface has now become much clearer. The distance between the spacecraft and the asteroid when this photo was taken was about 40 km.

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