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Jonathan's Space Report 
No. 751 draft                                                 2018 Jun 19  Somerville, MA
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JSR 750 is now permalinked at http://planet4589.org/space/jsr/back/news.750.txt

International Space Station
---------------------------

Expedition 56 continues with astronauts Feustel, Artemev, Arnold, Prokop'ev,
Aunon-Chancellor and Gerst.

On Jun 20 the Canadarm-2/Dextre robot arm combo plucked Surrey's RemoveDebris
technology satellite from the Kibo airlock and released it into orbit.

On Jun 23 at 0815 UTC the ISS orbit was boosted with a 0.4m/s burn from
Progress MS-08 which increased apogee by 2 km.

Tiangong 2
-----------

China's Tiangong-2 spacelab was used for a single human expedition in
2016; China has announced that no further visits are planned. Since
Shenzhou 11 left in Nov 2016, TG-2 has made small reboost manuevers on
2017 Mar 5, Apr 5-6, May 13, Jun 17-20, Sep 17, and Nov 4. The Tianzhou-1
freighter docked with it several times between Apr and Sep 2017 and
transferred an unknown amount of propellant. The freighter carried about
2000 kg of propellant in eight 250 kg tanks, half of which were for
its own maneuevers. I am guessing each of the three propellant transfer
exercises that were carried out involved one tank's worth.

On 2018 Jun 13 at around 0645 and 0735 UTC the lab made a two-impulse
manuever to lower its orbit from 388 x 391 km to 293 x 299 km. It seemed
as if this might be a precursor to a deorbit burn, but on Jun 22 at
about 0117 and 0202 UTC a second two-impulse manuever restored the orbit
to 390 x 399 km. The full sequence used about 330 kg of propellant.
If we assumed Tianzhou left the 1000-kg-capacity tanks full, that leaves
about 670 kg. Total mass of Tiangong-2 including propellant
is probably now around 8500 kg. At least 250 kg of propellant is
required to safely deorbit the vehicle at end of mission.

Chinese technology satellites
-----------------------------

On Jun 27 China launched two satellites carrying intersatellite communications and imaging sensor
technology experiments. The satellites are referred to as
`xin jishu shiyan' A and B xing (New Technology Test sat A and B). 

Hayabusa-2
----------

On Jun 27 at 0030 UTC Hayabusa-2 began stationkeeping 20 km from the 0.9 km-diameter asteroid (162173) Ryugu.
The probe will later approach the asteroid and obtain samples for return to Earth.


Table of Recent Orbital Launches 
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Date UT       Name            Launch Vehicle        Site            Mission       INTL.   Catalog  Perigee Apogee  Incl   Notes
Jun  2 0413   Gao Fen 6       )       Chang Zheng 2D    Jiuquan          Imaging      48A   S43484   635 x   646 x 98.0
              Luojia-1 KSW 01 )                                          Imaging      48B   S43485   635 x   647 x 98.0
Jun  4 0445   SES-12                  Falcon 9 FT       Canaveral SLC40  Comms        49A   S43488   210 x 58276 x 25.9
Jun  5 1307   Fengyun 2 09            Chang Zheng 3A    Xichang LC2      Weather      50A   S43491   219 x 35906 x 24.6
Jun  6 1112   Soyuz MS-09             Soyuz-FG          Baykonur LC1     Spaceship    51A   S43493   190 x   247 x 51.6
Jun 12 0420   IGS R-6                 H-IIA             Tanegashima      Radar        52A   S43495   500 x   502 x 97.4
Jun 16 2146   Kosmos-2527             Soyuz-2-1B/Fregat Plesetsk         Navigation   53A   S43508 19116 x 19155 x 64.8
Jun 20 1135   RemoveDebris                              ISS, LEO         Tech        9867NT S43510   401 x   407 x 51.6
Jun 27 0330   XJS A )                 Chang Zheng 2C    Xichang          Tech         54A   S43518   465 x   483 x 35.0
              XJS B )                                                    Tech         54B   S43519   476 x   486 x 35.0

Table of Recent Suborbital Launches
-----------------------------------

The suborbital launches table includes known flights above 80 km.

Date UT       Payload/Flt Name Launch Vehicle      Site                  Mission    Apogee/km    Target

Jun  3 0418   Agni RV           Agni V             Kalam Island          Test          800       Indian O.
Jun 18 1900   EVE 7             Black Brant 9      White Sands           Solar EUV     250?      White Sands
Jun 21 0930   NASA 41.120UO     Terrier Imp.Orion  Wallops Island        Education     120       Atlantic

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|  Jonathan McDowell                 |                                    |
|  Somerville MA 02143               |  inter : planet4589 at gmail       |
|  USA                               |  twitter: @planet4589              |
|                                                                         |
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