Mission: Hayabusa 2 Options

[Phil Stooke]

No new details, but this version of the map has an improved base image. The positional control is slightly better as well, so the sites are shifted slightly to match the modified base.

Phil

[Guest_mcmcmc_*]

http://www.hayabusa2.jaxa.jp/en/enjoy/mate...023_ver6_en.pdf

[Guest_mcmcmc_*]

Descent started:

https://programmi.000webhostapp.com/hayabus...simulator3.html

Detailed schedule of the mission is now online: http://www.hayabusa2.jaxa.jp/en/topics/201...D1-R3_Schedule/
This time it won't be just a "almost-touch & go", but the spacecraft will stay at 20m altitude for around 20 minutes, from 02:30 to 02:50 UTC.

[Hungry4info]

The Hayabusa 2 twitter feed reports that the target marker was released.

[TD1-R3] October 25 at 12:40 JST: Communication with the high-gain antenna (HGA) has resumed & telemetry on the status of the spacecraft is confirmed. The spacecraft is normal. The target marker is confirmed to be separated. The spacecraft is now at an altitude of more than 1200m

As is typically the case whenever anything interesting happens, the live image page has stopped updating.

[Guest_mcmcmc_*]

The Hayabusa 2 twitter feed reports that the target marker was released.

As is typically the case whenever anything interesting happens, the live image page has stopped updating.

Twitter feed reveals that at lowest altitude even the live telemetries were not available due to usage of low-gain antenna, not to mention the high-speed-transmission-demanding images:

[TD1-R3] October 25, 12:06 JST: Confirmation that the spacecraft has begun to rise. Near the lowest point, the low-gain antenna (LGA) were in use & telemetry wasn’t possible. The spacecraft velocity was monitored with Doppler Data. Low altitude circumstances to be confirmed later

https://twitter.com/haya2e_jaxa/status/1055301107495227392

Indeed this resulted in a mess in the live telemetries used by JAXA simulator, resulting in this messed up chart (I cleaned up the calculated speeds, but I can't do anything about wrong readings from LIDAR):

[Explorer1]

An image of the marker on the surface is here: https://twitter.com/haya2e_jaxa/status/1055421132784824320

To think... my name (and hopefully a lot of UMSFers' names are on board that little speck..

AAS Press conference here in a few hours (12:00 EST): https://aas.org/media-press/aas-press-conference-webcasts

[alan]

Big boulder on Ryuga's pole is named Otohime.

https://twitter.com/sharponlooker/status/1055499790463746048

[Phil Stooke]

Map update! Several changes including the boulder name.

Phil

[Paolo]

some amazing selfies of the sampler horn taken by the crowdfunded small monitor camera
http://www.hayabusa2.jaxa.jp/en/topics/20181026e_CAM-H/

[yoichi]

http://www.hayabusa2.jaxa.jp/en/topics/201...6e_TD1R1A_ONCT/
The highest resolution image of Ryugu

[charborob]

Animated sequence of 41 images taken during the second touchdown rehearsal.

[fredk]

The highest resolution image of Ryugu

...not including MINERVA and MASCOT of course.

[Jackbauer]

Asteroid Ryugu imaged at High resolution

https://aas.org/files/resources/dps50_lucille_le_corre.pdf

[Paolo]

very long paper on Hayabusa's cameras:
Updated Inflight Calibration of Hayabusa2's Optical Navigation Camera (ONC) for Scientific Observations during the Cruise Phase

The Optical Navigation Camera (ONC-T, ONC-W1, ONC-W2) onboard Hayabusa2 are also being used for scientific observations of the mission target, C-complex asteroid 162173 Ryugu. Science observations and analyses require rigorous instrument calibration. In order to meet this requirement, we have conducted extensive inflight observations during the 3.5 years of cruise after the launch of Hayabusa2 on 3 December 2014. In addition to the first inflight calibrations by Suzuki et al. (2018), we conducted an additional series of calibrations, including read-out smear, electronic-interference noise, bias, dark current, hot pixels, sensitivity, linearity, flat-field, and stray light measurements for the ONC. Moreover, the calibrations, especially flat-fields and sensitivities, of ONC-W1 and -W2 are updated for the analysis of the low-altitude (i.e., high-resolution) observations, such as the gravity measurement, touchdowns, and the descents for MASCOT and MINERVA-II payload releases. The radiometric calibration for ONC-T is also updated in this study based on star and Moon observations. Our updated inflight sensitivity measurements suggest the accuracy of the absolute radiometric calibration contains less than 1.8% error for the ul-, b-, v-, Na-, w-, and x-bands based on star calibration observations and ~5% for the p-band based on lunar calibration observations. The radiance spectra of the Moon, Jupiter, and Saturn from the ONC-T show good agreement with the spacecraft-based observations of the Moon from SP/SELENE and WAC/LROC and with ground-based telescopic observations for Jupiter and Saturn.

[Guest_mcmcmc_*]

Missions profiles analyses:


Annotated:


Details for TD1-R3:





Recorded telemetries up to now (with additional cleaned up data from noise and errors):
https://programmi.000webhostapp.com/hayabus...1-20181027).txt
https://programmi.000webhostapp.com/hayabus...181027)-ita.txt (decimal commas)





3d model of terrain from TD1-R1A imageset:
https://sketchfab.com/models/a8e3cee4ea9444...4fe1a4f2eef58ed