OA-4, previously known as Orbital-4, was the fourth successful flight of the Orbital ATKuncrewed resupply spacecraftCygnus and its third flight to the International Space Station (ISS) under the Commercial Resupply Services (CRS-1) contract with NASA.[8][9] With the Antares launch vehicle undergoing a redesign following its failure during the Orb-3 launch, OA-4 was launched by an Atlas V launch vehicle. Following three launch delays due to inclement weather beginning on 3 December 2015, OA-4 was launched at 21:44:57 UTC on 6 December 2015. With a liftoff weight of 7,492 kg (16,517 lb), OA-4 became the heaviest payload ever launched on an Atlas V.[10] The spacecraft rendezvoused with and was berthed to the ISS on 9 December 2015.[6] It was released on 19 February 2016 after 72 days at the International Space Station. Deorbit occurred on 20 February 2016 at approximately 16:00 UTC.[4]
OA-4 was the fourth of eight flights by Orbital ATK under the Commercial Resupply Services (CRS-1) contract with NASA and the inaugural flight of the larger Enhanced Cygnus PCM. The mission was originally scheduled for 1 April 2015.[11] The Atlas Vlaunch vehicle launched in the 401 vehicle configuration with a four-meter fairing, no solid rocket boosters and a single-engine Centaur upper stage.[8]
In an Orbital ATK tradition, this Cygnus spacecraft was named Deke Slayton II after Deke Slayton, one of NASA's original Mercury Sevenastronauts and Director of Flight Operations, who died in 1993. This spacecraft reuses the name Deke Slayton, originally applied to the Orb-3 spacecraft which was lost in an Antares rocket explosion in October 2014.[12]
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The mission was the first flight of the enhanced variant of Orbital ATK's Cygnus spacecraft, capable of delivering more than 3,500 kg (7,700 lb) of essential crew supplies, equipment and scientific experiments to the International Space Station (ISS).
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^"Space industry giants Orbital upbeat ahead of Antares debut". NASASpaceFlight.com. 22 February 2012. Retrieved 31 May 2021.
^"International Space Station and crew awaiting Atlas 5 launch of Cygnus". Spaceflight Now. 29 November 2015. Retrieved 2 December 2015.
^ ab"At ~11 am ET today..." twitter.com. Orbital ATK. 20 February 2016. Retrieved 20 February 2016.
^"Cygnus ORB-4". N2YO.com. Retrieved 9 December 2015.
^ abcRay, Justin (9 December 2015). "U.S. resupply of space station successfully resumes". Spaceflight Now. Retrieved 9 December 2015.
^Evans, Ben (19 February 2016). "As OA-4 Cygnus Departs, Commercial Cargo Providers Prepare for Busy Visiting Vehicle Manifest". AmericaSpace. Retrieved 20 February 2016.
^ ab"Launch Schedule". Spaceflight Now. Retrieved 26 January 2015.
^"International Space Station Flight Schedule". SEDS. 15 May 2013.
^Ray, Justin (6 December 2015). "Atlas 5 rocket sends Cygnus in hot pursuit of space station". Spaceflight Now. Retrieved 7 December 2015.
^Graham, William; Bergin, Chris (28 October 2014). "Orbital's Antares fails seconds after launch". NASASpaceFight.com.
^. Orbital ATK. 1 December 2015. Archived from the original on 8 December 2015. Retrieved 2 December 2015.
^"Orbital ATK CRS-4 Mission Overview" (PDF). NASA. Retrieved 9 December 2015. This article incorporates text from this source, which is in the public domain.
^"Low Earth Orbiting Navigation Experiment for Spacecraft Testing Autonomous Rendezvous and Docking (LONESTAR)". NASA. Retrieved 12 December 2015. This article incorporates text from this source, which is in the public domain.
cygnus, previously, known, orbital, fourth, successful, flight, orbital, uncrewed, resupply, spacecraft, cygnus, third, flight, international, space, station, under, commercial, resupply, services, contract, with, nasa, with, antares, launch, vehicle, undergoi. OA 4 previously known as Orbital 4 was the fourth successful flight of the Orbital ATK uncrewed resupply spacecraft Cygnus and its third flight to the International Space Station ISS under the Commercial Resupply Services CRS 1 contract with NASA 8 9 With the Antares launch vehicle undergoing a redesign following its failure during the Orb 3 launch OA 4 was launched by an Atlas V launch vehicle Following three launch delays due to inclement weather beginning on 3 December 2015 OA 4 was launched at 21 44 57 UTC on 6 December 2015 With a liftoff weight of 7 492 kg 16 517 lb OA 4 became the heaviest payload ever launched on an Atlas V 10 The spacecraft rendezvoused with and was berthed to the ISS on 9 December 2015 6 It was released on 19 February 2016 after 72 days at the International Space Station Deorbit occurred on 20 February 2016 at approximately 16 00 UTC 4 OA 4An Atlas V 401 launches the S S Deke Slayton II NamesOrbital 4 2008 2015 Mission typeISS Resupply 1 OperatorOrbital ATKCOSPAR ID2015 072ASATCAT no 41101Mission duration75 days 18 hours 15 minutesSpacecraft propertiesSpacecraftS S Deke Slayton IISpacecraft typeEnhanced Cygnus 2 ManufacturerOrbital ATKThales AleniaLaunch mass7 492 kg 16 517 lb 3 Payload mass3 513 kg 7 745 lb Start of missionLaunch date6 December 2015 21 44 57 UTCRocketAtlas V 401 AV 061 Launch siteCape Canaveral SLC 41ContractorUnited Launch AllianceEnd of missionDisposalDeorbitedDecay date20 February 2016 16 00 UTC 4 Orbital parametersReference systemGeocentric orbit 5 RegimeLow Earth orbitInclination51 64 Berthing at the International Space StationBerthing portUnity nadirRMS capture9 December 2015 11 19 UTC 6 Berthing date9 December 2015 14 26 UTCUnberthing date19 February 2016 10 38 UTC 7 RMS release19 February 2016 12 26 UTCTime berthed71 days 20 hours 12 minutesNASA insignia Commercial Resupply Services SpaceX CRS 7OA 6 Cygnus flights Orb 3OA 6 Contents 1 Spacecraft 2 Manifest 3 See also 4 References 5 External linksSpacecraft editMain article Cygnus spacecraft OA 4 was the fourth of eight flights by Orbital ATK under the Commercial Resupply Services CRS 1 contract with NASA and the inaugural flight of the larger Enhanced Cygnus PCM The mission was originally scheduled for 1 April 2015 11 The Atlas V launch vehicle launched in the 401 vehicle configuration with a four meter fairing no solid rocket boosters and a single engine Centaur upper stage 8 In an Orbital ATK tradition this Cygnus spacecraft was named Deke Slayton II after Deke Slayton one of NASA s original Mercury Seven astronauts and Director of Flight Operations who died in 1993 This spacecraft reuses the name Deke Slayton originally applied to the Orb 3 spacecraft which was lost in an Antares rocket explosion in October 2014 12 Manifest editThe mission was the first flight of the enhanced variant of Orbital ATK s Cygnus spacecraft capable of delivering more than 3 500 kg 7 700 lb of essential crew supplies equipment and scientific experiments to the International Space Station ISS Total cargo 3 349 kilograms 7 383 lb 6 13 Crew supplies 1 181 kg 2 604 lb Crew care packages Crew provisions FoodVehicle Hardware 1 010 kg 2 230 lb Crew health care system hardware Environment control and life support equipment Electrical power system hardware Extravehicular robotics equipment Flight crew equipment PL facility Structural and mechanical equipment Internal thermal control system hardwareScience Investigations 847 kg 1 867 lb A new life science facility called the Space Automated Bio Lab SABL that will support studies on cell cultures bacteria and other micro organisms A microsatellite deployer and the second microsatellite to be deployed from the space station The NASA LONESTAR experimental payload consisting of the AggieSat4 and Bevo 2 satellites 14 The AggieSat4 satellite built by engineering students at Texas A amp M University deploys the smaller Bevo 2 CubeSat stored inside of it The Bevo 2 CubeSat designed and built by engineering and computer science students at the University of Texas at Austin Experiments that will study the behavior of gases and liquids and clarify the thermo physical properties of molten steel and Evaluations of flame resistant textiles Computer Resources 87 kilograms 192 lb Command and data handling Photo and TV equipmentSpacewalk Equipment 230 kg 510 lb A new SAFER jetpack Extravehicular Mobility Unit EMU parts including legs gloves tethers and batteries Airlock cooling loop partsTotal cargo with packing material 3 513 kg 7 745 lb See also editUncrewed spaceflights to the International Space StationReferences edit NASA Science Cargo Heads to Space Station on Northrop Grumman Resupply Mission NASA 2 October 2020 Retrieved 31 May 2021 nbsp This article incorporates text from this source which is in the public domain Space industry giants Orbital upbeat ahead of Antares debut NASASpaceFlight com 22 February 2012 Retrieved 31 May 2021 International Space Station and crew awaiting Atlas 5 launch of Cygnus Spaceflight Now 29 November 2015 Retrieved 2 December 2015 a b At 11 am ET today twitter com Orbital ATK 20 February 2016 Retrieved 20 February 2016 Cygnus ORB 4 N2YO com Retrieved 9 December 2015 a b c Ray Justin 9 December 2015 U S resupply of space station successfully resumes Spaceflight Now Retrieved 9 December 2015 Evans Ben 19 February 2016 As OA 4 Cygnus Departs Commercial Cargo Providers Prepare for Busy Visiting Vehicle Manifest AmericaSpace Retrieved 20 February 2016 a b Launch Schedule Spaceflight Now Retrieved 26 January 2015 International Space Station Flight Schedule SEDS 15 May 2013 Ray Justin 6 December 2015 Atlas 5 rocket sends Cygnus in hot pursuit of space station Spaceflight Now Retrieved 7 December 2015 Graham William Bergin Chris 28 October 2014 Orbital s Antares fails seconds after launch NASASpaceFight com Orbital ATK s Cargo Delivery Mission to International Space Station Set to Launch Orbital ATK 1 December 2015 Archived from the original on 8 December 2015 Retrieved 2 December 2015 Orbital ATK CRS 4 Mission Overview PDF NASA Retrieved 9 December 2015 nbsp This article incorporates text from this source which is in the public domain Low Earth Orbiting Navigation Experiment for Spacecraft Testing Autonomous Rendezvous and Docking LONESTAR NASA Retrieved 12 December 2015 nbsp This article incorporates text from this source which is in the public domain External links edit nbsp Media related to Cygnus 5 at Wikimedia Commons Portal nbsp Spaceflight Retrieved from https en wikipedia org w index php title Cygnus OA 4 amp oldid 1098274158, wikipedia, wiki, book, books, library,
