NG-23 CARGO MISSION ARRIVES AT ISS, Sept 18, 2025, Earth orbit, 5:45/7:18/8:25 am ET

Update, September 17, 9:50 pm ET:  NASA has now issued a press release confirming NG-23’s arrival tomorrow and explaining the problem yesterday was “an early warning system initiated a shutdown command and ended the main engine burn because of a conservative safeguard in the software settings.”

Update, September 17, 8:10 pm ET:  NASA’s list of events shows NG-23 arriving at the ISS tomorrow, Thursday, but we haven’t seen a press release or anything else confirming that or explaining how they resolved the propulsion system problem.

Update, September 16:  The NG-23 Cygnus has experienced a propulsion system problem and arrival at the ISS will be delayed as NASA and NG determine how to compensate for it.  A new arrival date is TBD as of 6:30 pm ET today.

Original Entry: If launch of Northrop Grumman’s NG-23 Cygnus spacecraft with cargo for the International Space Station crew is on time on September 14, it will arrive at the ISS on September 17 at 6:35 am ET.

Cygnus berths to the ISS rather than docks, so it is captured by Canadarm2 and then installed onto a docking port.

NASA coverage begins at 5:00 am ET for the 6:35 am ET arrival. Coverage of the installation of Cygnus onto the docking port begins at 8:00 am ET. Watch on NASA+ and Amazon Prime.