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Hayabusa 2 (Хаябуса-2), Procyon – H-IIA F26 – Танэгасима – 03.12.2014 04:22:04 UTC, (успешно)
HAYABUSA2@JAXA‏ @haya2e_jaxa 26 мин. назад

[MASCOT] October 3 at 03:05 JST: Hayabusa2 has descended to an altitude of about 2900m: we’ve passed 3km to the asteroid surface!
The small asteroid lander, MASCOT

MASCOT (Mobile Asteroid Surface Scout) is the asteroid lander jointly developed by DLR (German Aerospace Center) and CNES (French National Center for Space Studies). MASCOT is stored on the -Y-plane side of Hayabusa2 (this is the left-hand side surface when the high gain antenna is at the head and the ion engine is at the spacecraft back) and deployed fr om this position (see Figure 1).

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Figure 1: Illustration of the Hayabusa2 spacecraft. MASCOT is stored on the -Y-plane (left side) panel.(Image credit:JAXA)

MASCOT has the shape of a cuboid with dimensions 0.3 x 0.3 x 0.2m. The lander weighs about 10kg, and is a bit larger and heavier than the MINERVA-II1 rovers (diameter: 18cm, height: 7cm, weight: 1.1kg). (Figure 2).

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Figure 2: Flight model of MASCOT (Image credit: DLR)

On the top side of MASCOT is an antenna to communicate with the repeater (OME-E) of Hayabusa2, as with MINERVA-II1. A wide-angle camera (MASCAM) is mounted on the side to capture images of the lander’s surrounding. An infrared spectroscopic microscope (MircOmega) sits on the bottom surface of MASCOT to investigate the composition and characteristics of the minerals on the surface of Ryugu. There is also a thermal radiometer (MARA) to measure the surface temperature and a magnetometer (MasMag) to measure any magnetic field.

MASCOT also has a hopping mechanism similar to that of MINERVA-II1. Using a motor to rotate a swing-arm within the lander, MASCOT can change its attitude or jump. Since MASCOT is designed to operate in the position wh ere the top antenna is directed upwards and the spectroscopic microscope faces downwards, this hopping mechanism can correct the attitude if the lander is in a different orientation once on the surface of Ryugu. MASCOT can also use the hop to move locations once; the lander does not hop multiple times like the MINERVA-II1 rovers.

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Figure 3: Left: Illustration of MASCOT separating from Hayabusa2. Right: Illustration of MASCOT landing on the surface of Ryugu. (Image credit: JAXA)

For the landing site for MASCOT, a region in the southern hemisphere of Ryugu was selected (Figure 4). This location was selected based on criteria that ensured no overlap between the landing sites for the touchdown of Hayabusa2, MINERVA-II1 and MASCOT, the time to be able to communicate with Hayabusa2, the duration of sunlight exposure and expectation of scientifically meaningful exploration.

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Figure 4: MASCOT landing site candidate region (light blue area). Since MASCOT is expected to bounce several times after first touching down, a reasonably wide region is selected.
(Image credit: JAXA, University of Tokyo, Kochi University, Rikkyo University, Nagoya University, Chiba Institute of Technology, Meiji University, University of Aizu, AIST, CNES, DLR).

MASCOT does not use solar cells but is equipped with a lithium primary battery built into the lander. The duration of the battery is about 16 hours (about two rotations of Ryugu), allowing MASCOT to operate continuously for two Ryugu days after a successful separation. Operation of the lander will end when the battery runs out.

Hayabusa2 project
MASCOT Lander‏Подлинная учетная запись @MASCOT2018 9:05 - 2 окт. 2018 г.

I’ll do many things! I’ll be there for two asteroid days & take lots of pictures. I've a very neat camera equipped with leds so I can take pics even if it's very dark! And maybe I'll even be able to see a boulder from the side!

小惑星探査機「はやぶさ2」‏Подлинная учетная запись @haya2_jaxa 13:37 - 2 окт. 2018 г.

【MASCOT】10月3日05:35 JST、高度は約2000mです。 写真は日本時間で5時頃にONC-W1で撮影されたものです。

【MASCOT】 3 октября 05:35 JST, высота около 2000 м.
Фотография была сделана камерой ONC-W1 около 5 часов по японскому времени.
HAYABUSA2@JAXA‏ @haya2e_jaxa 15:34 - 2 окт. 2018 г.

[MASCOT] October 3 at 07:00 JST: Hayabusa2 has descended to an altitude of 1500 m.
Live coverage: MASCOT lander set to explore asteroid Ryugu
October 2, 2018 | Stephen Clark

10/03/2018 01:57 Stephen Clark

Here's the latest view from Hayabusa 2's wide-angle navigation camera, showing asteroid Ryugu from a range of about 1.5 kilometers (1 mile). This image was captured at 2217 GMT (6:17 p.m. EDT).

Hayabusa 2 is using its control thrusters and a laser navigation system to guide it toward Ryugu. Here's a timeline of the expected events to come tonight:
  • 2320 GMT (7:20 p.m. EDT): Hayabusa 2 begins communicating through JAXA's Usuda ground station in Japan.
  • 0030 GMT (8:30 p.m. EDT): Hayabusa 2 is 500 meters (1,640 feet) from Ryugu.
  • 0120 GMT (9:20 p.m. EDT): Hayabusa 2 is 250 meters (820 feet) from Ryugu.
  • 0151 GMT (9:51 p.m. EDT): This is the approximate time Hayabusa 2 reaches a target altitude for deployment of MASCOT around 60 meters (196 feet) from Ryugu. Hayabusa 2 will slow its approach from 10 centimeters per second to 3 centimeters per second (0.22 mph to 0.07 mph).
  • 0155:35 GMT (9:55:55 p.m. EDT): Hayabusa 2 shuts off its control thrusters and enters a free fall toward Ryugu, tugged by the asteroid's tenuous gravity.
  • 0158:15 GMT (9:58:15 p.m. EDT): MASCOT is released from Hayabusa 2.
It will take anywhere from 5 to 10 minutes for MASCOT to reach the asteroid's surface, and the robot is predicted to touch down at a velocity of around 20 centimeters per second, or less than 0.5 mph, seven times slower than a human's average walking pace.

The battery-powered robot will likely bounce across the asteroid a few times after landing, then settle into place to begin its 16-hour science campaign. MASCOT carries an uprighting mechanism to ensure its instruments and antennas are pointed in the right direction, and an internal swing arm is available to allow the rover to hop to different locations on the asteroid during its mission, which is limited by the craft's battery power supply.
3 октября в 7:30 JST зонд опустился до высоты 1000 м и начал переход к фазе сближения.
小惑星探査機「はやぶさ2」‏Подлинная учетная запись @haya2_jaxa 16:32 - 2 окт. 2018 г.

【MASCOT】10月3日 7:30 JST:昼シフトへの引き継ぎブリーフィングが行われました。現在の高度は1000m。前回に引き続き、探査機は最接近のフェー­ズに入ります。
ちょっと長いですが、ドイツに向かって大きな声でエールを送りましょう! (IES兄)
3 октября 8:50 JST - зонд продолжает спуск до высоты около 800 м. Камера снова может фиксировать собственную тень зонда. Фотографии реального времени - ※ по ссылке.
小惑星探査機「はやぶさ2」‏Подлинная учетная запись @haya2_jaxa 16:51 - 2 окт. 2018 г.

【MASCOT】10月3日 8:50 JST:探査機の高度は間もなく800mになります。 はやぶさ2のカメラにも、再び探査機自身の影が映り始めました。 ※今回の航法画像のリアルタイム配信はこちらから http://www.hayabusa2.jaxa.jp/galleries/onc/nav20181002/ …

10/03/2018 03:12 Stephen Clark

The region marked in blue in this image is the target landing zone for MASCOT.

There is some uncertainty over where MASCOT will end up after bouncing across the asteroid's surface, but the targeted touchdown location is situated in the southern hemisphere of Ryugu, at around 30 degrees south latitude.

The robot could end up anywhere within around 200 meters (656 feet) of the targeted landing site, according to the German space agency, DLR.
MASCOT Lander ‏Подлинная учетная запись @MASCOT2018 17:37 - 2 окт. 2018 г.

Getting ready! MARA is switched on, ready to start measuring temperature during descent, and so is MASMAG
10/03/2018 03:40 Stephen Clark

Officials at DLR's lander control center report MASCOT is powered up to start collecting data during its final descent.
10/03/2018 04:21 Stephen Clark

JAXA says Hayabusa 2 was at a distance from Ryugu of around 400 meters, or 1,300 feet, as of 0110 GMT (9:10 p.m. EDT).
DLR - English‏Подлинная учетная запись @DLR_en 18:23 - 2 окт. 2018 г.

The @MASCOT2018 asteroid lander is scheduled to land on site MA-9. But where exactly is that? In Ryugu’s southern hemisphere, at approximately 315 degrees east and 30 degrees south
#asteroidlanding #hayabusa2

More about the landing site! https://www.dlr.de/dlr/en/desktopdefault.aspx/tabid-10081/151_read-29511/#/gallery/31820 …

10/03/2018 04:38 Stephen Clark

Hayabusa 2's shadow is growing in size as the spacecraft nears the asteroid.

Высота над местом высадки около 220 м. Изображение получено станциями ДКС в 10:12 JST 2018-10-03.
小惑星探査機「はやぶさ2」‏Подлинная учетная запись @haya2_jaxa 3 мин.3 минуты назад

【MASCOT】探査機の直下点高度は約220m。 画像は 地上受信時刻 JST 2018-10-03 10:12 のものです。

10/03/2018 04:51 Stephen Clark

Makoto Yoshikawa, JAXA's Hayabusa 2 mission manager, just briefed reporters in Sagamihara, Japan, on the progress of the spacecraft's descent.

"We are moving according to the schedule as planned," Yoshikawa said.
HAYABUSA2@JAXA‏ @haya2e_jaxa 19:00 - 2 окт. 2018 г.

[MASCOT] Spacecraft altitude is now about 150m.
Высота над Рюгю - 130 м. Изображение получено на Земле в 10:46 JST 2018-10-03
小惑星探査機「はやぶさ2」‏Подлинная учетная запись @haya2_jaxa 19:02 - 2 окт. 2018 г.

【MASCOT】探査機の直下点高度、約130m。 画像は 地上受信時刻 JST 2018-10-03 10:46 のもの

HAYABUSA2@JAXA‏ @haya2e_jaxa 19:26 - 2 окт. 2018 г.

[MASCOT] MASCOT has a lithium primary battery that will last approximately 16 hours. This is about two asteroid days on Ryugu! Once the battery runs out, the lander operation will end.
Jonathan McDowell‏Подлинная учетная запись @planet4589 20:03 - 2 окт. 2018 г.

Still no word from JAXA or DLR on the status of MASCOT as far as can tell.
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