Progress M-27M

 2015-024A

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Spacecraft 426, mission 59P. Mass 7289 kg including 879 kg prop, refuelling prop 494 kg, 50 kg O2, Rodnik water, 420 kg; cargo in GO 1393 kg. Total cargo 2357 kg.

After launch the vehicle was found spinning rapidly in yaw, with no vehicle telemetry and unresponsive to ground command, although onboard video was downlinked. Early element sets showing a lower than planned orbit were incorrect. The failure was linked to structural resonance issues in the third stage separation sequence, a design error in the Progress/Soyuz-2-1a combination.

Progress M-27M
Date	Time	Event	Orbit
2015 Apr 28	0709	Launch by Soyuz-2-1a	KB LC31?
		T+1:57 Strapons sep
		T+4:36 Blok-A MECO
		T+4:47 Blok-A sep
		T+4:56 KhO sep
		T+4:58 GO sep
	0715	T+8:44 MECO
	0715	T+8:48 Blok-I sep	187 x 259 x 51.7
2015 May 8	0204	Reentry over Pacific

Yaogan 8

 2009-072A

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YG-8 was built by the Aerospace Shanghai Technical Institute of the China Aerospace Science and Technology Corp. The optical imaging payload was from the Changchun Light Tech Institute.

The XW-1 satellite was carried as a piggyback payload.

Mass 1040 kg, box + 2 panels

Zhongguo yaogan weixing ba hao Launch by changzheng sihao bing.

In May 2015 the perigee was raised by 4 km. This may have been a retirement manuever.

YW8
Date	Time	Event	Orbit
2009 Dec 15	0231:05	Launch by CZ-4C	TY
	0233	T+2:32? St 1 sep
	0233	St 2 burn
	0234	T+2:47? Fairing sep
	0237	T+6:48? Stage 2 MECO
	0237	T+6:49? St 2 sep
		Stage 3 burn 1
	0242?	Stage 3 MECO
	0252?	Stage 3 sep
		109.39 1192 x 1204 x 100.5
2010 Jan 1			109.39 1193 x 1203 x 100.5
2014 Jun 12			109.38 1193 x 1203 x 100.3
2015 May 16			109.37 1191 x 1204 x 100.2
2015 May 21		Orbit raise	109.43 1195 x 1205 x 100.2