NG-11

Canadarm2 grapples the S.S.Roger Chaffee, whileDragon C108 is docked toHarmony.
Names	CRS NG-11 CRS OA-11 (2016–2018)
Mission type	ISS resupply
Operator	Northrop Grumman
COSPAR ID	2019-022A
SATCATno.	44188
Mission duration	232 days, 18 hours, 42 minutes
Spacecraft properties
Spacecraft	S.S.Roger Chaffee
Spacecraft type	Enhanced Cygnus
Manufacturer	Northrop Grumman Thales Alenia Space
Start of mission
Launch date	17 April 2019, 20:46:07 (2019-04-17UTC20:46:07Z) UTC (4:46:07 pm EDT)[1]
Rocket	Antares 230
Launch site	MARS,Pad 0A
End of mission
Disposal	Deorbited
Decay date	6 December 2019, 15:28 (2019-12-06UTC15:28Z) UTC
Orbital parameters
Reference system	Geocentric orbit
Regime	Low Earth orbit
Inclination	51.66°
Berthing atISS
Berthing port	Unitynadir
RMS capture	19 April 2019, 09:28 UTC[1]
Berthing date	19 April 2019, 11:31 UTC
Unberthing date	6 August 2019, 13:30 UTC[2]
RMS release	6 August 2019, 16:15 UTC[3]
Time berthed	109 days, 1 hour, 59 minutes
Cargo
Mass	3,436 kg (7,575 lb)[4]
Pressurised	3,162 kg (6,971 lb)
Unpressurised	239 kg (527 lb)
NASA insignia Commercial Resupply Services ← SpaceX CRS-16 SpaceX CRS-17 → Cygnus flights ← NG-10 NG-12 →

NG-11, previously known asOA-11, is the twelfth flight of theNorthrop Grummanrobotic resupply spacecraftCygnus and its eleventh flight to theInternational Space Station under theCommercial Resupply Services (CRS-1) contract withNASA.^[5][6] The mission launched on 17 April 2019 at 20:46:07UTC.^[1] This is the last mission from the extended CRS-1 (phase 1) contract; follow-up missions are part of the CRS-2 contract.^[7] Cygnus NG-11 was also the first mission to load critical hardware onto Cygnus within the last 24 hours prior to launch, a new Antares feature.^[8]

Orbital ATK andNASA jointly developed a new space transportation system to provide commercial cargo resupply services to the International Space Station (ISS). Under theCommercial Orbital Transportation System (COTS) program, thenOrbital Sciences designed and builtAntares, a medium-class launch vehicle;Cygnus, an advanced maneuvering spacecraft, and a Pressurized Cargo Module which is provided by Orbital's industrial partnerThales Alenia Space.^[9] Northrop Grumman purchased Orbital in June 2018; its ATK division was renamedNorthrop Grumman Innovation Systems.^[10]

Concurrently, Nepalese satelliteNepaliSat-1 and Sri Lankan satelliteRaavana 1 were launched as part of Cygnus NG-11 as deployable payloads.^[11]

Cygnus NG-11 is part of an extension program that enables NASA to cover the ISS resupply needs until theCommercial Resupply Services 2 contract enters in effect.^[12] The mission launched on 17 April 2019, at 20:46:07 UTC fromWallops Island,Virginia.

Production and integration of Cygnus spacecraft is performed in Dulles, Virginia. The Cygnus service module is mated with the pressurized cargo module at the launch site, and mission operations are conducted from control centers inDulles, Virginia andHouston,Texas.^[9] This will be the eighth flight of the Enhanced-sized Cygnus PCM.^[13]

The spacecraft for the NG-11 is named the S.S.Roger Chaffee afterRoger Chaffee who lost his life during training for theApollo 1 mission.^[14] On 17 April 2019 at 20:46:07 UTC, Antares launched the NG-11 mission to the International Space Station fromWallops Island,Virginia.^[1][15]

Total weight of cargo: 3,436 kg (7,575 lb), consisting of 3,162 kg (6,971 lb) in pressurized cargo and 229 kg (505 lb) in unpressurized cargo.^[4]

• Crew supplies: 987 kg (2,176 lb)
• Science investigations: 1,569 kg (3,459 lb)
• Spacewalk equipment: 24 kg (53 lb)
• Vehicle hardware: 628 kg (1,385 lb)
• Computer resources: 4.5 kg (9.9 lb)
• Northrop Grumman-related equipment: 35 kg (77 lb)

Smallsats deployed during NG-11:

• AeroCube 10A (JimSat) and10B (DougSat) byThe Aerospace Corporation^[16]
• Aeternitas,Ceres, andLibertas, three CubeSats in the Virginia CubeSat Constellation, launched as part of NASA'sELaNa-26 mission, developed byOld Dominion University,Virginia Tech, and theUniversity of Virginia, respectively.^[17][18]
• EntrySat^[17]
• IOD-1 GEMS (In-Orbit Demonstration - Global Environmental Monitoring Satellite)^[17]
• KRAKsat, a CubeSat created by Polish students fromAGH University of Science and Technology andJagiellonian University^[17][19]
• SASSI² (Student Aerothermal Spectrometer Satellite of Illinois and Indiana)^[20]
• Seeker, a free-flying NASA CubeSat for vehicle inspection^[17]
• SpooQy 1^[17]
• Światowid, a CubeSat bySatRevolution^[17]
• 60 × ThinSats in 12 strings, experimental miniature satellites built by school children and university students^[20][21]
• Uguisu,Raavana 1, andNepaliSat-1, 1U CubeSats developed by students inJapan,Sri Lanka, andNepal, respectively, as part of the BIRDS-3 project^[17]

New hardware, known as the Thermal Amine Scrubber, the first Exploration ECLSS Tech Demonstration aboard ISS, which will be activated in April 2019 and scrub additional CO₂ from the ISS atmosphere.

• Uncrewed spaceflights to the International Space Station

• Cygnus (spacecraft)
• Supply vehicles for the International Space Station
• Spacecraft launched in 2019
• Spacecraft launched by Antares rockets
• Spacecraft which reentered in 2019

• Source attribution
• Articles with short description
• Short description is different from Wikidata
• Use American English from September 2020
• All Wikipedia articles written in American English
• Use dmy dates from November 2019