|Mission type||ISS resupply|
|Mission duration||113 days|
|Spacecraft type||Progress-M s/n 423|
|Launch mass||7280 kg|
|Start of mission|
|Launch date||9 April 2014, 15:26:27 UTC|
|Launch site||Baikonur, Site 1/5|
|End of mission|
|Decay date||31 July 2014, 22:42 UTC|
|Perigee altitude||193 km|
|Apogee altitude||245 km|
|Epoch||9 April 2014|
|Docking with ISS|
|Docking date||9 April 2014, 21:14 UTC|
|Undocking date||21 July 2014, 21:44 UTC|
|Time docked||103 days|
|Pressurised||1215 kg (dry cargo)|
Progress M-23M (Russian: Прогресс М-23М), identified by NASA as Progress 55P, is a Progress spacecraft used by Roskosmos to resupply the International Space Station (ISS) during 2014. Progress M-23M was launched on a six-hours rendezvous profile towards the ISS. The 23rd Progress-M 11F615A60 spacecraft to be launched, it had the serial number 427 and was built by RKK Energia.
Progress M-23M docked with the Pirs docking compartment on 9 April 2014 at 21:14 UTC, less than six hours after launch.
The Progress spacecraft carries 2383 kg of cargo and supplies to the International Space Station.
Progress M-23M undocked from the ISS on 21 July 2014, and was deorbited on 31 July after participating in the Radar-Progress experiment.