7,621 satellites and probes · 443 rockets
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Satellites and probes: O

209 satellites and probes
SpacecraftLaunchOperatorLaunch vehicle
O/OREOSO/OREOSNovember 20, 2010National Aeronautics and Space AdministrationMinotaur IV
O3B FM10December 18, 2014—Soyuz-2.1b
O3B FM11December 18, 2014—Soyuz-2.1b
O3B FM12December 18, 2014—Soyuz-2.1b
O3B FM13March 9, 2018—Soyuz-2.1b
O3B FM14March 9, 2018—Soyuz-2.1b
O3B FM15March 9, 2018—Soyuz-2.1b
O3B FM16March 9, 2018—Soyuz-2.1b
O3B FM17April 4, 2019—Soyuz-2.1b
O3b FM18April 4, 2019—Soyuz-2.1b
O3B FM19April 4, 2019—Soyuz-2.1b
O3b FM2June 25, 2013—Soyuz-2.1b
O3B FM20April 4, 2019—Soyuz-2.1b
O3b FM21December 16, 2022—Falcon 9
O3b FM22December 16, 2022—Falcon 9
O3b FM23April 28, 2023SES S.A.Falcon 9 Block 5
O3b FM24April 28, 2023SES S.A.Falcon 9 Block 5
O3b FM25November 12, 2023—Falcon 9
O3b FM26November 12, 2023——
O3b FM27December 17, 2024—Falcon 9 Block 5
O3b FM28December 17, 2024—Falcon 9 Block 5
O3B FM3July 10, 2014—Soyuz-2.1b
O3B FM4June 25, 2013—Soyuz-2.1b
O3B FM5June 25, 2013—Soyuz-2.1b
O3B FM6July 10, 2014—Soyuz-2.1b
O3B FM7July 10, 2014—Soyuz-2.1b
O3B FM8July 10, 2014—Soyuz-2.1b
O3B FM9December 18, 2014—Soyuz-2.1b
O3b mPOWER 10July 22, 2025—Falcon 9 Block 5
O3b mPOWER 9July 22, 2025—Falcon 9 Block 5
O3B PFMJune 25, 2013—Soyuz-2.1b
OAST FlyerOAST FlyerJanuary 11, 1996Goddard Space Flight CenterSpace Shuttle
Obzor-R 1December 25, 2025Roscosmos State CorporationSoyuz-2.1a
Oceansat-1Oceansat-1May 26, 1999Indian Space Research OrganisationPolar Satellite Launch Vehicle
Oceansat-2September 23, 2009Indian Space Research OrganisationPolar Satellite Launch Vehicle-CA
Oceansat-3Oceansat-3November 26, 2022—Polar Satellite Launch Vehicle-XL
OCSJanuary 27, 2000—Minotaur I
ODERACS 2AFebruary 3, 1995——
ODERACS 2BFebruary 3, 1995——
ODERACS 2CFebruary 3, 1995——
ODERACS 2DFebruary 3, 1995——
ODERACS 2EFebruary 3, 1995——
OdinFebruary 20, 2001—Start-1
Odin spacecraftOdin spacecraftFebruary 26, 2025AstroForgeFalcon 9
Ofeq-1September 19, 1988Israel Space AgencyShavit
Ofeq-10April 9, 2014Israel Defense ForcesShavit-2
Ofeq-11September 13, 2016Israel Defense ForcesShavit-2
Ofeq-13March 28, 2023Israel Defense ForcesShavit-2
Ofeq-16July 6, 2020Israel Defense ForcesShavit-2
Ofeq-19September 2, 2025Israel Defense ForcesShavit-2
Ofeq-2April 3, 1990Israel Space AgencyShavit
Ofeq-3April 5, 1995Israel Defense ForcesShavit-1
Ofeq-4January 22, 1998Israel Defense ForcesShavit-1
Ofeq-5May 28, 2002Israel Defense ForcesShavit-1
Ofeq-6September 6, 2004Israel Defense ForcesShavit-1
Ofeq-7Ofeq-7June 10, 2007Israel Defense ForcesShavit-2
Ofeq-9June 22, 2010Israel Defense ForcesShavit-2
OGCh-6———
OGO 1September 5, 1964—Atlas LV-3 Agena-B
OGO 2October 14, 1965—Thor-Agena D
OGO 3June 7, 1966—Atlas SLV-3 Agena-B
OGO 4July 28, 1967—Thor-Agena D
OGO 5March 4, 1968—Atlas SLV-3A Agena-D
OGO 6June 5, 1969—Thorad-Agena D
OhsumiOhsumiFebruary 11, 1970—Lambda 4S
OhzoraFebruary 14, 1984Institute of Space and Astronautical ScienceM-3S
OICETSAugust 23, 2005Japan Aerospace Exploration AgencyDnepr
Okean OJuly 17, 1999—Zenit-2
OkinaSeptember 14, 2007—H-IIA
Olymp-K 1September 27, 2014Federal Security ServiceProton-M
Olymp-K 2March 12, 2023Federal Security ServiceProton-M
Olympus-1July 12, 1989European Space AgencyAriane 3
OmidOmidFebruary 2, 2009Iranian Space AgencySapphire-2
Omnispace F2June 19, 2001—Atlas II
OMOTENASHIOMOTENASHINovember 16, 2022—Space Launch System Block 1
OneWeb-0721May 20, 2023—Falcon 9 Block 5
OOV-CubeJuly 9, 2024—Ariane 62
OpportunityOpportunityJuly 8, 2003Jet Propulsion LaboratoryDelta II
OPS 0855OPS 0855November 3, 1966—Titan IIIC
OPS 3762December 21, 1964—Thor-Agena D
OPS 6874September 16, 1966—Atlas SLV-3 Agena-D
OPS-SATOPS-SATDecember 18, 2019European Space AgencySoyuz
OPTOSOPTOSNovember 21, 2013Instituto Nacional de Técnica Aeroespacial Esteban TerradasDnepr
OPTSAT-3000August 2, 2017Ministry of Defence of ItalyVega
Optus 10September 11, 2014—Ariane 5 ECA
Optus 1CJune 11, 2003—Ariane 5G
OPTUS B3August 27, 1994—Long March 2E
Optus B3 perigee kick motorAugust 27, 1994—Long March 2E
OPTUS D1October 13, 2006—Ariane 5 ECA
Optus D2October 5, 2007OptusAriane 5GS
Optus D3August 21, 2009OptusAriane 5 ECA
Optus-XNovember 17, 2024OptusFalcon 9 Block 5
OPUSatFebruary 27, 2014Osaka Prefecture UniversityH-IIA
OPUSAT-IIFebruary 20, 2021—Antares
Orbcomm CDS-1February 9, 1993OrbcommPegasus
Orbcomm CDS-2April 25, 1993OrbcommPegasus
Orbcomm FM-01April 3, 1995OrbcommPegasus-H
Orbcomm FM-02April 3, 1995OrbcommPegasus-H
Orbcomm FM-03February 10, 1998OrbcommMinotaur-C
Orbcomm FM-04February 10, 1998OrbcommMinotaur-C
Orbcomm FM-05December 23, 1997OrbcommPegasus-XL
Orbcomm FM-06December 23, 1997OrbcommPegasus-XL
Orbcomm FM-07December 23, 1997OrbcommPegasus-XL
Orbcomm FM-08December 23, 1997OrbcommPegasus-XL
Orbcomm FM-09December 23, 1997OrbcommPegasus-XL
Orbcomm FM-10December 23, 1997OrbcommPegasus-XL
Orbcomm FM-11December 23, 1997OrbcommPegasus-XL
Orbcomm FM-12December 23, 1997OrbcommPegasus-XL
Orbcomm-OG2 1October 8, 2012OrbcommFalcon 9 v1.0
Orbcomm-XJuly 17, 1991OrbcommAriane 40
ORBICRAFT-ZORKIYMarch 22, 2021—Soyuz-2.1a
ORBIS 1April 21, 1964—Thor-Able
ORBIS CAL IAugust 16, 1968—Atlas E/F
ORBIS LOWNovember 18, 1964—Thor-Agena D
Orbital ReflectorDecember 3, 2018—Falcon 9 Block 5
Orbiting Astronomical ObservatoryOrbiting Astronomical ObservatoryApril 8, 1966National Aeronautics and Space AdministrationAtlas SLV-3B Agena-D
Orbiting Astronomical Observatory 2Orbiting Astronomical Observatory 2December 7, 1968National Aeronautics and Space AdministrationAtlas SLV-3C Centaur-D
Orbiting Astronomical Observatory 3Orbiting Astronomical Observatory 3August 21, 1972Goddard Space Flight CenterAtlas SLV-3C Centaur-D
Orbiting Astronomical Observatory BOrbiting Astronomical Observatory BNovember 30, 1970National Aeronautics and Space AdministrationAtlas SLV-3C Centaur-D
Orbiting Carbon ObservatoryOrbiting Carbon ObservatoryFebruary 24, 2009National Aeronautics and Space AdministrationMinotaur-C 3110
Orbiting Carbon Observatory 2Orbiting Carbon Observatory 2July 2, 2014National Aeronautics and Space AdministrationDelta II
Orbiting Frog OtolithOrbiting Frog OtolithNovember 9, 1970—Scout B
Orbiting Picosat Automatic LauncherJanuary 27, 2000—Minotaur I
Orbiting Solar Observatory 7Orbiting Solar Observatory 7September 29, 1971National Aeronautics and Space AdministrationDelta N
Orbiting Solar Observatory 8Orbiting Solar Observatory 8June 21, 1975National Aeronautics and Space AdministrationDelta 1000
OrbView 1April 3, 1995GeoEyePegasus-H
OrbView 2OrbView 2August 1, 1997GeoEyePegasus-XL
OrbView 3June 26, 2003GeoEyePegasus-XL
OrbView 4September 21, 2001GeoEyeMinotaur-C
Oreol 1Oreol 1December 27, 1971—Kosmos-3M
Oreol 2December 26, 1973—Kosmos-3M
Oreol 3Oreol 3September 21, 1981—Tsyklon-3
OREXOREXFebruary 3, 1994National Space Development AgencyH-II
ORFEUS-SPAS IORFEUS-SPAS ISeptember 12, 1993National Aeronautics and Space Administration, German Space AgencySpace Shuttle
ORFEUS-SPAS IIORFEUS-SPAS IINovember 19, 1996National Aeronautics and Space Administration, German Space AgencySpace Shuttle
OrigamiSat-1January 18, 2019—Epsilon
OrigamiSat-2April 23, 2026Tokyo Institute of TechnologyElectron
OrionOrionApril 16, 1972National Aeronautics and Space AdministrationSaturn V
Orion 001Orion 001December 5, 2014National Aeronautics and Space AdministrationDelta IV Heavy
Orion 002Orion 002November 16, 2022National Aeronautics and Space AdministrationSpace Launch System Block 1
Orion 3May 5, 1999Loral Space & CommunicationsDelta III
Orion 6January 18, 2009National Reconnaissance OfficeDelta IV Heavy
Orion 7November 21, 2010National Reconnaissance OfficeDelta IV Heavy
Orion 9June 11, 2016National Reconnaissance OfficeDelta IV Heavy
ORS 1ORS 1August 19, 1966—Atlas SLV-3 Agena-D
ORS-5ORS-5August 26, 2017Operationally Responsive Space OfficeMinotaur IV
OSCAR 1OSCAR 1December 12, 1961—Thor-Agena B
OSCAR 13June 15, 1988—Ariane 44LP
OSCAR 18January 22, 1990—Ariane 40
OSCAR 19January 22, 1990—Ariane 40
OSCAR 2OSCAR 2June 2, 1962—Thor-Agena B
OSCAR 23April 26, 1988—Scout G-1
OSCAR 3OSCAR 3March 9, 1965—Thor-Agena D
OSCAR 4OSCAR 4December 21, 1965—Titan IIIC
OSCAR 8March 5, 1978—Delta 2000
OSIRIS-3UAugust 14, 2017—Falcon 9 Full Thrust
OSIRIS-RExOSIRIS-RExSeptember 8, 2016University of ArizonaAtlas V 411
OSIRIS-REx Sample Return CapsuleOSIRIS-REx Sample Return CapsuleSeptember 8, 2016University of ArizonaAtlas V 411
OSLJanuary 1, 1996—Delta II
OSO 1OSO 1March 7, 1962National Aeronautics and Space AdministrationThor-Delta
OSO 2OSO 2February 3, 1965National Aeronautics and Space AdministrationDelta C
OSO 3OSO 3March 8, 1967National Aeronautics and Space AdministrationDelta C
OSO 4OSO 4October 18, 1967National Aeronautics and Space AdministrationThor-Delta
OSO 5OSO 5January 22, 1969National Aeronautics and Space AdministrationThor-Delta
OSO 6August 9, 1969National Aeronautics and Space AdministrationDelta N
OSO-CAugust 25, 1965——
OSSI-1OSSI-1April 19, 2013—Soyuz-2.1a
OSTM/Jason-2OSTM/Jason-2June 20, 2008National Oceanic and Atmospheric Administration, National Aeronautics and Space Administration, CNES, EUMETSATDelta II
OTS 1September 13, 1977European Space AgencyDelta 3000
OTS 2May 11, 1978European Space AgencyDelta 3000
OUFTI-1April 25, 2016—Soyuz-2.1a
OunaSeptember 14, 2007—H-IIA
OV1- 2October 5, 1965—SM-65D Atlas
OV1- 4March 30, 1966—SM-65D Atlas
OV1- 5March 30, 1966—SM-65D Atlas
OV1-1January 21, 1965—SM-65D Atlas
OV1-10December 11, 1966—SM-65D Atlas
OV1-11July 27, 1967—SM-65D Atlas
OV1-12July 27, 1967—SM-65D Atlas
OV1-13April 6, 1968—Atlas E/F
OV1-14April 6, 1968—Atlas E/F
OV1-15July 11, 1968—Atlas E/F
OV1-17March 18, 1969—Atlas E/F
OV1-17AMarch 18, 1969—Atlas E/F
OV1-18March 18, 1969—Atlas E/F
OV1-19March 18, 1969—Atlas E/F
OV1-20August 7, 1971—Atlas E/F
OV1-3May 28, 1965—SM-65D Atlas
OV1-6November 3, 1966—Titan IIIC
OV1-7July 14, 1966—SM-65D Atlas
OV1-86July 27, 1967—SM-65D Atlas
OV1-9December 11, 1966—SM-65D Atlas
OV2-1OV2-1October 15, 1965—Titan IIIC
OV2-3OV2-3December 21, 1965—Titan IIIC
OV2-5September 26, 1968—Titan IIIC
OV3-1OV3-1April 22, 1966—Scout B
OV3-2October 28, 1966—Scout B
OV3-3August 4, 1966—Scout B
OV3-4OV3-4June 10, 1966—Scout B
OV3-5January 31, 1967—Scout B
OV3-6December 5, 1967—Scout B
OV4-1RNovember 3, 1966—Titan IIIC
OV4-1TNovember 3, 1966—Titan IIIC
OV5-5May 23, 1969—Titan IIIC
OV5-6May 23, 1969—Titan IIIC
OV5-8August 16, 1968—Atlas E/F
OV5-9May 23, 1969—Titan IIIC
Ovzon-3January 3, 2024OvzonFalcon 9 Block 5
ØrstedØrstedFebruary 23, 1999Terma A/SDelta II