// A–Z index
Spacecraft: M
245 spacecraft whose names begin with M. Click a column to sort; type to filter this page.
245 shown
| Spacecraft | Launched | Owner | Country | Mission type | Status |
|---|---|---|---|---|---|
| M-Cubed-22013-072H | Dec 6, 2013 | UM | United States | Technology | In orbit |
| M6P2019-018AF | Apr 1, 2019 | NanoAvionics | Lithuania | Communications | Reentered (orbital decay) |
| MABES1986-061C | Aug 12, 1986 | NASDA | Japan | Technology | In orbit, attached to another object |
| Magellan1989-033B | May 4, 1989 | JPL | United States | Deep space | Left Earth orbit for deep space |
| Magion 11978-099C | Oct 24, 1978 | Ceskoslovensko | Czechoslovakia | Space science | Reentered (orbital decay) |
| Magion 21989-080B | Sep 28, 1989 | Ceskoslovensko | Czechoslovakia | Space science | In orbit |
| Magion 31991-086E | Dec 18, 1991 | CSFR | Czechoslovakia | Space science | In orbit |
| Magion 41995-039F | Aug 2, 1995 | Ceska Rep. | Czechia | Space science | Left Earth orbit for deep space |
| Magion 51996-050B | Aug 29, 1996 | Ceska Rep. | Czechia | Space science | In orbit |
| MAGNARO-II Tigris2026-088G | Apr 23, 2026 | Nagoya | Japan | Technology | In orbit |
| Magnetospheric Multiscale 12015-011A | Mar 13, 2015 | GSFC | United States | Space science | Left Earth orbit for deep space |
| Magnetospheric Multiscale 22015-011B | Mar 13, 2015 | GSFC | United States | Space science | Left Earth orbit for deep space |
| Magnetospheric Multiscale 32015-011C | Mar 13, 2015 | GSFC | United States | Space science | Left Earth orbit for deep space |
| Magnetospheric Multiscale 42015-011D | Mar 13, 2015 | GSFC | United States | Space science | Left Earth orbit for deep space |
| Magnum1965-062B | Aug 3, 1965 | NRO | United States | Signals intelligence | Reentered (orbital decay) |
| MagSat1979-094A | Oct 30, 1979 | GSFC | United States | Space science | Reentered (orbital decay) |
| Mahda2024-018A | Jan 28, 2024 | IRSA | Iran | Technology | In orbit |
| Malligyong-1 #32023-179A | Nov 21, 2023 | Choson | North Korea | Optical imaging | In orbit |
| Mandrake 2 Able2021-059AE | Jun 30, 2021 | SDA | United States | Communications | In orbit |
| Mandrake 2 Baker2021-059AF | Jun 30, 2021 | SDA | United States | Communications | In orbit |
| MANTIS2023-174B | Nov 11, 2023 | Open Cosmos | United Kingdom | Optical imaging | Reentered (orbital decay) |
| MAPP2025-038 | Feb 27, 2025 | Lunar Outpost | United States | — | Landed attached to another object |
| MaqSat-B1997-066B | Oct 30, 1997 | ESA | European Space Agency | Technology | In orbit, attached to another object |
| MaqSat-H1997-066A | Oct 30, 1997 | ESA | European Space Agency | Technology | In orbit, attached to another object |
| MarCO-A2018-042B | May 5, 2018 | JPL | United States | Deep space | Left Earth orbit for deep space |
| MarCO-B2018-042C | May 5, 2018 | JPL | United States | Deep space | Left Earth orbit for deep space |
| Marecs 11981-122A | Dec 20, 1981 | ESA | European Space Agency | Communications | In orbit |
| Marecs 21984-114B | Nov 10, 1984 | ESA | European Space Agency | Communications | In orbit |
| Mariner 101973-085A | Nov 3, 1973 | JPL | United States | Deep space | Left Earth orbit for deep space |
| Mariner 21962 A RHO 1 | Aug 27, 1962 | JPL | United States | Deep space | Left Earth orbit for deep space |
| Mariner 31964-073A | Nov 5, 1964 | JPL | United States | Deep space | Left Earth orbit for deep space |
| Mariner 41964-077A | Nov 28, 1964 | JPL | United States | Deep space | Left Earth orbit for deep space |
| Mariner 51967-060A | Jun 14, 1967 | JPL | United States | Deep space | Left Earth orbit for deep space |
| Mariner 61969-014A | Feb 25, 1969 | JPL | United States | Deep space | Left Earth orbit for deep space |
| Mariner 71969-030A | Mar 27, 1969 | JPL | United States | Deep space | Left Earth orbit for deep space |
| Mariner 91971-051A | May 30, 1971 | JPL | United States | Deep space | Left Earth orbit for deep space |
| Marisat 11976-017A | Feb 19, 1976 | Comsat | United States | Communications | In orbit |
| Marisat 21976-053A | Jun 10, 1976 | Comsat | United States | Communications | In orbit |
| Marisat 31976-101A | Oct 14, 1976 | Comsat | United States | Communications | In orbit |
| Maritime Monitoring and Messaging Micro-Satellite2016-040G | Jun 22, 2016 | DND DSD | Canada | Communications | Reentered (orbital decay) |
| Maroc-TUBSAT2001-056D | Dec 10, 2001 | CRTS | Morocco | Optical imaging | In orbit |
| Mars 11962 B NU 3 | Nov 1, 1962 | OKB-1 | Soviet Union | Deep space | Left Earth orbit for deep space |
| Mars 21971-045A | May 19, 1971 | IKI | Soviet Union | Deep space | Left Earth orbit for deep space |
| Mars 2 Lander1971-045D | May 19, 1971 | IKI | Soviet Union | Deep space | Left for deep space attached to another object |
| Mars 20202020-052A | Jul 30, 2020 | JPL | United States | Deep space | Left for deep space attached to another object |
| Mars 2MV-3 No.11962 B XI 1 | Nov 4, 1962 | OKB-1 | Soviet Union | Deep space | Reentered attached to another object |
| Mars 2MV-4 No.11962 B IOT 1 | Oct 24, 1962 | OKB-1 | Soviet Union | Deep space | Reentered (orbital decay) |
| Mars 31971-049A | May 28, 1971 | IKI | Soviet Union | Deep space | Left Earth orbit for deep space |
| Mars 41973-047A | Jul 21, 1973 | IKI | Soviet Union | Deep space | Left Earth orbit for deep space |
| Mars 51973-049A | Jul 25, 1973 | IKI | Soviet Union | Deep space | Left Earth orbit for deep space |
| Mars 61973-052A | Aug 5, 1973 | IKI | Soviet Union | Deep space | Left Earth orbit for deep space |
| Mars 71973-053A | Aug 9, 1973 | IKI | Soviet Union | Deep space | Left Earth orbit for deep space |
| Mars Climate Orbiter1998-073A | Dec 11, 1998 | JPL | United States | Deep space | Left Earth orbit for deep space |
| Mars Express2003-022A | Jun 2, 2003 | ESA | European Space Agency | Deep space | Left Earth orbit for deep space |
| Mars Global Surveyor1996-062A | Nov 7, 1996 | JPL | United States | Deep space | Left Earth orbit for deep space |
| Mars Hope2020-047A | Jul 19, 2020 | Rashid Space Ctr | United Arab Emirates | Deep space | Left Earth orbit for deep space |
| Mars InSight Cruise Stage2018-042A | May 5, 2018 | NASA | United States | — | Released |
| Mars Observer1992-063A | Sep 25, 1992 | JPL | United States | Deep space | Left Earth orbit for deep space |
| Mars Orbiter Mission2013-060A | Nov 5, 2013 | ISRO | India | Deep space | Left Earth orbit for deep space |
| Mars Pathfinder1996-068A | Dec 4, 1996 | JPL | United States | Deep space | Left for deep space attached to another object |
| Mars Polar Lander1999-001A | Jan 3, 1999 | JPL | United States | Deep space | Left for deep space attached to another object |
| Mars Reconnaissance Orbiter2005-029A | Aug 12, 2005 | JPL | United States | Deep space | Left Earth orbit for deep space |
| Mars Science Laboratory2011-070A | Nov 26, 2011 | JPL | United States | Deep space | Left Earth orbit for deep space |
| Mars-21971-045A | May 19, 1971 | IKI | Soviet Union | — | Entered orbit around the target |
| Mars-31971-049A | May 28, 1971 | IKI | Soviet Union | — | Entered orbit around the target |
| MARScom2006-055D | Dec 10, 2006 | USNA | United States | Communications | Reentered (orbital decay) |
| Martian Moons eXploration2026-236A | Oct 19, 2026 | JAXA | Japan | — | — |
| MaSat-12012-006E | Feb 13, 2012 | BME | Hungary | Technology | Reentered (orbital decay) |
| MASCOT2014-076 | Dec 3, 2014 | DLR | Germany | — | Escaped to another body, attached |
| MATS2022-147A | Nov 4, 2022 | SNSB | Sweden | Earth science | In orbit |
| MAVEN2013-063A | Nov 18, 2013 | GSFC | United States | Deep space | Left Earth orbit for deep space |
| Max Valier Sat2017-036P | Jun 23, 2017 | GO Max Valier | Italy | Astronomy | Reentered (orbital decay) |
| Maya-11998-067PE | Jun 29, 2018 | DOST | Philippines | Technology | Reentered (orbital decay) |
| Maya-21998-067SF | Feb 20, 2021 | DOST | Philippines | Technology | Reentered (orbital decay) |
| Maya-31998-067SS | Aug 29, 2021 | DOST | Philippines | Technology | Reentered (orbital decay) |
| Maya-41998-067ST | Aug 29, 2021 | DOST | Philippines | Technology | Reentered (orbital decay) |
| Mayak2017-042F | Jul 14, 2017 | Moscow Polytech | Russia | Technology | Reentered (orbital decay) |
| Mazaalai (satellite)1998-067MW | Jun 3, 2017 | NU Mongolia | Mongolia | Technology | Reentered (orbital decay) |
| MDS-12002-003A | Feb 4, 2002 | NASDA | Japan | Technology | In orbit |
| MEASAT-11996-002B | Jan 12, 1996 | Binariang | Malaysia | Communications | Renamed |
| MEASAT-21996-063B | Nov 13, 1996 | Binariang | Malaysia | Communications | Renamed |
| MEASAT-32006-056A | Dec 11, 2006 | Measat | Malaysia | Communications | In orbit |
| MEASAT-3a2009-032A | Jun 21, 2009 | Measat | Malaysia | Communications | In orbit |
| MEASAT-3b2014-054B | Sep 11, 2014 | Measat | Malaysia | Communications | In orbit |
| MEASAT-3d2022-067B | Jun 22, 2022 | Measat | Malaysia | Communications | In orbit |
| Megha-Tropiques2011-058A | Oct 12, 2011 | ISRO | India | Optical imaging | Deorbited |
| MegSat1999-022B | Apr 28, 1999 | MegSat | Italy | Communications | Reentered (orbital decay) |
| Megsat2000-057B | Sep 26, 2000 | MegSat | Italy | Space science | In orbit |
| Mengtian experiment module2022-143A | Oct 31, 2022 | ZZHGB | China | Human spaceflight | Docked with another object |
| Menut2023-001B | Jan 3, 2023 | Open Cosmos | Spain | Optical imaging | In orbit |
| Merah Putih 22024-035A | Feb 20, 2024 | Telkom | Indonesia | Communications | In orbit |
| Mercury Planetary Orbiter2018-080A | Oct 20, 2018 | ESA | European Space Agency | Deep space | Left for deep space attached to another object |
| Mercury-Atlas 41961 A ALP 1 | Sep 13, 1961 | NASA LaRC/STG | United States | Human spaceflight | Landed |
| Mercury-Atlas 51961 A IOT 1 | Nov 29, 1961 | NASA | United States | Human spaceflight | Landed |
| Mercury-Atlas 61962 GAM 1 | Feb 20, 1962 | NASA | United States | Human spaceflight | Landed |
| Mercury-Atlas 71962 TAU 1 | May 24, 1962 | MSC | United States | Human spaceflight | Landed |
| Mercury-Atlas 81962 B DEL 1 | Oct 3, 1962 | MSC | United States | Human spaceflight | Landed |
| Mercury-Atlas 91963-015A | May 15, 1963 | MSC | United States | Human spaceflight | Landed |
| Meridian 12006-061A | Dec 24, 2006 | KVR | Russia | Communications | Reentered (orbital decay) |
| Meridian 22009-029A | May 21, 2009 | Resehetnev ISS | Russia | Communications | Reentered (orbital decay) |
| Meridian 32010-058A | Nov 2, 2010 | KVR | Russia | Communications | In orbit |
| Meridian 42011-018A | May 4, 2011 | KVR | Russia | Communications | Reentered (orbital decay) |
| Meridian 62012-063A | Nov 14, 2012 | VVKO | Russia | Communications | In orbit |
| Meridian 72014-069A | Oct 30, 2014 | VVKO | Russia | Communications | In orbit |
| Meridian-M 102022-030A | Mar 22, 2022 | VVKO VKS | Russia | Communications | In orbit |
| Meridian-M 112026-071A | Apr 3, 2026 | VVKO VKS | Russia | Communications | In orbit |
| Meridian-M 82019-046A | Jul 30, 2019 | VVKO VKS | Russia | Communications | In orbit |
| Meridian-M 92020-015A | Feb 20, 2020 | VVKO VKS | Russia | Communications | In orbit |
| MESAT12024-125G | Jul 4, 2024 | U Maine | United States | Space science | In orbit |
| MESSENGER2004-030A | Aug 3, 2004 | APL | United States | Deep space | Left Earth orbit for deep space |
| Meteor 1-101971-120A | Dec 29, 1971 | GUKOS RVSN | Soviet Union | Meteorology | In orbit |
| Meteor 1-21969-084A | Oct 6, 1969 | TsUKOS | Soviet Union | Meteorology | Reentered (orbital decay) |
| Meteor 1-31970-019A | Mar 17, 1970 | GUKOS RVSN | Soviet Union | Meteorology | Reentered (orbital decay) |
| Meteor-1 11969-029A | Mar 26, 1969 | TsUKOS | Soviet Union | Meteorology | Reentered (orbital decay) |
| Meteor-3M No.12001-056A | Dec 10, 2001 | Rosgidromet | Russia | Meteorology | In orbit |
| Meteor-M No.12009-049A | Sep 17, 2009 | Rosgidromet | Russia | Meteorology | In orbit |
| Meteor-M No.2-12014-037A | Jul 8, 2014 | Rosgidromet | Russia | Meteorology | In orbit |
| Meteor-M No.2-22019-038A | Jul 5, 2019 | Rosgidromet | Russia | Meteorology | In orbit |
| Meteoroid Technology Satellite1972-061A | Aug 13, 1972 | NASA LaRC | United States | Space science | Reentered attached to another object |
| Meteosat 11977-108A | Nov 23, 1977 | ESA | European Space Agency | Meteorology | In orbit |
| Meteosat 102012-035B | Jul 5, 2012 | EUMETSAT | EUMETSAT | Meteorology | In orbit |
| Meteosat 112015-034A | Jul 15, 2015 | EUMETSAT | EUMETSAT | Meteorology | In orbit |
| Meteosat 122022-170C | Dec 13, 2022 | EUMETSAT | EUMETSAT | Meteorology | In orbit |
| Meteosat 132025-143A | Jul 1, 2025 | EUMETSAT | EUMETSAT | Meteorology | In orbit |
| Meteosat 21981-057A | Jun 19, 1981 | ESA | European Space Agency | Meteorology | In orbit |
| Meteosat 31988-051A | Jun 15, 1988 | EUMETSAT | EUMETSAT | Meteorology | In orbit |
| Meteosat 41989-020B | Mar 6, 1989 | EUMETSAT | EUMETSAT | Meteorology | In orbit |
| Meteosat 51991-015B | Mar 2, 1991 | EUMETSAT | EUMETSAT | Meteorology | In orbit |
| Meteosat 61993-073B | Nov 20, 1993 | EUMETSAT | EUMETSAT | Meteorology | In orbit |
| Meteosat 71997-049B | Sep 2, 1997 | EUMETSAT | EUMETSAT | Meteorology | In orbit |
| Meteosat 82002-040B | Aug 28, 2002 | EUMETSAT | EUMETSAT | Meteorology | In orbit |
| Meteosat 92005-049B | Dec 21, 2005 | EUMETSAT | EUMETSAT | Meteorology | In orbit |
| MethaneSAT2024-043D | Mar 4, 2024 | MethaneSAT | United States | Earth science | In orbit |
| MetOp-A2006-044A | Oct 19, 2006 | EUMETSAT | EUMETSAT | Meteorology | In orbit |
| MetOp-B2012-049A | Sep 17, 2012 | EUMETSAT | EUMETSAT | Meteorology | In orbit |
| MetOp-C2018-087A | Nov 7, 2018 | EUMETSAT | EUMETSAT | Meteorology | In orbit |
| MetOp-SG-A12025-172A | Aug 13, 2025 | EUMETSAT | EUMETSAT | Meteorology | In orbit |
| MEV-12019-067B | Oct 9, 2019 | Space Logistics | United States | Technology | Docked with another object |
| MEV-22020-056B | Aug 15, 2020 | Space Logistics | United States | Technology | Docked with another object |
| MEXSAT-32012-075B | Dec 19, 2012 | AEMX | Mexico | Communications | In orbit |
| MICE-12025-276DP | Nov 28, 2025 | Rashid Space Ctr | United Arab Emirates | Technology | In orbit |
| Michibiki 12010-045A | Sep 11, 2010 | JAXA | Japan | Navigation | Renamed |
| Michibiki 1R2021-096A | Oct 26, 2021 | NUSS | Japan | Navigation | In orbit |
| Michibiki 22017-028A | Jun 1, 2017 | NUSS | Japan | Navigation | In orbit |
| Michibiki 32017-048A | Aug 19, 2017 | NUSS | Japan | Navigation | In orbit |
| Michibiki 42017-062A | Oct 9, 2017 | NUSS | Japan | Navigation | In orbit |
| Michibiki 62025-023A | Feb 2, 2025 | NUSS | Japan | Navigation | In orbit |
| Michibiki 72026-182A | Aug 10, 2026 | NUSS | Japan | — | — |
| MicroCarb2025-156A | Jul 26, 2025 | CNES | France | Space science | In orbit |
| MicroDragon2019-003D | Jan 18, 2019 | VNSC | Vietnam | Technology | Reentered (orbital decay) |
| MicroHETsat2023-185E | Dec 1, 2023 | SITAEL SpA | Italy | Technology | In orbit |
| Microsat 11991-051A | Jul 17, 1991 | DARPA | United States | Communications | Reentered (orbital decay) |
| Microsat 21991-051B | Jul 17, 1991 | DARPA | United States | Communications | Reentered (orbital decay) |
| Microsat 31991-051C | Jul 17, 1991 | DARPA | United States | Communications | Reentered (orbital decay) |
| Microsat 41991-051D | Jul 17, 1991 | DARPA | United States | Communications | Reentered (orbital decay) |
| Microsat 51991-051E | Jul 17, 1991 | DARPA | United States | Communications | Reentered (orbital decay) |
| Microsat 61991-051F | Jul 17, 1991 | DARPA | United States | Communications | Reentered (orbital decay) |
| Microsat 71991-051G | Jul 17, 1991 | DARPA | United States | Communications | Reentered (orbital decay) |
| Microsat-11996-050A | Aug 29, 1996 | IUA Cordoba | Argentina | Optical imaging | Reentered (orbital decay) |
| Microsat-R2019-006A | Jan 24, 2019 | DRDO | India | Optical imaging | Collided |
| Microsat-TD2018-004T | Jan 12, 2018 | DRDO | India | Technology | Reentered (orbital decay) |
| MicroSCOPE2016-025B | Apr 25, 2016 | CNES | France | Space science | In orbit |
| Microvariability and Oscillations of Stars2003-031D | Jun 30, 2003 | CSA | Canada | Astronomy | Renamed |
| MIDAS 101966-051A | Jun 9, 1966 | USAF SSD | United States | Missile early warning | Reentered attached to another object |
| MIDAS 111966-077A | Aug 19, 1966 | USAF SSD | United States | Missile early warning | In orbit, attached to another object |
| MIDAS 121966-089A | Oct 5, 1966 | USAF SSD | United States | Missile early warning | In orbit |
| MIDAS 21960 ZET 1 | May 24, 1960 | USAF BMD | United States | Missile early warning | Reentered attached to another object |
| MIDAS 31961 SIG 1 | Jul 12, 1961 | USAF SSD | United States | Missile early warning | In orbit, attached to another object |
| MIDAS 41961 A DEL 1 | Oct 21, 1961 | USAF SSD | United States | Missile early warning | In orbit, attached to another object |
| MIDAS 51962 KAP 1 | Apr 9, 1962 | USAF SSD | United States | Missile early warning | In orbit, attached to another object |
| MIDAS 71963-014A | May 9, 1963 | USAF SSD | United States | Missile early warning | In orbit, attached to another object |
| MIDAS 91963-030A | Jul 19, 1963 | USAF SSD | United States | Missile early warning | In orbit, attached to another object |
| Midcourse Space Experiment1996-024A | Apr 24, 1996 | BMDO | United States | Technology | In orbit |
| MidSTAR-12007-006B | Mar 9, 2007 | USNA | United States | Technology | Reentered (orbital decay) |
| MightySat-11998-069C | Dec 4, 1998 | AFRL/RV | United States | Technology | Reentered (orbital decay) |
| MightySat-2.12000-042A | Jul 19, 2000 | AFRL/RV | United States | Technology | Reentered (orbital decay) |
| Mikhailo Lomonosov2016-026A | Apr 28, 2016 | MGU | Russia | Space science | Reentered (orbital decay) |
| Milani2024-180 | Oct 7, 2024 | ESA | European Space Agency | — | Escaped to another body, attached |
| Miles2022-156L | Nov 16, 2022 | Team Miles | United States | — | Flyby |
| MILStar 11994-009A | Feb 7, 1994 | USAF SMC | United States | Communications | In orbit |
| MILStar 21995-060A | Nov 6, 1995 | USAF SMC | United States | Communications | In orbit |
| MILStar 31999-023A | Apr 30, 1999 | USAF SMC | United States | Communications | In orbit |
| MILStar 52002-001A | Jan 16, 2002 | USAF SMC | United States | Communications | In orbit |
| MILStar 62003-012A | Apr 8, 2003 | USAF SMC | United States | Communications | In orbit |
| MIMOSA2003-031B | Jun 30, 2003 | Astron. Ustav. | Czechia | Space science | Reentered (orbital decay) |
| Minairó2023-054F | Apr 15, 2023 | Sateliot | Spain | Technology | Reentered (orbital decay) |
| Minerva2003-019 | May 9, 2003 | ISAS/JAXA | Japan | — | Escaped to another body, attached |
| Minerva II-1 Rover 1A2014-076 | Dec 3, 2014 | ISAS/JAXA | Japan | — | Escaped to another body, attached |
| Minerva II-1 Rover 1B2014-076 | Dec 3, 2014 | ISAS/JAXA | Japan | — | Escaped to another body, attached |
| Minerva II-2 Rover 22014-076 | Dec 3, 2014 | ISAS/JAXA | Japan | — | Escaped to another body, attached |
| Miniature X-ray Solar Spectrometer CubeSat (MinXSS)1998-067HU | Dec 6, 2015 | CU-LASP | United States | Astronomy | Reentered (orbital decay) |
| Minisat-011997-018A | Apr 21, 1997 | INTA | Spain | Space science | Reentered (orbital decay) |
| Minisatellite Italiano di Technologia Avanzata2000-039A | Jul 15, 2000 | ASI | Italy | Space science | Reentered (orbital decay) |
| Mio2018-080C | Oct 20, 2018 | JAXA | Japan | — | Escaped to another body, attached |
| MIP2008-052 | Oct 22, 2008 | ISRO | India | — | Released |
| Mir1986-017A | Feb 19, 1986 | NPO Energiya | Soviet Union | Human spaceflight | Deorbited |
| MIR-Sat 11998-067SP | Jun 3, 2021 | MRIC | Mauritius | Technology | Reentered (orbital decay) |
| Miranda1974-013A | Mar 9, 1974 | RAE | United Kingdom | Technology | In orbit |
| Mission Extension Pod-12026-167B | Jul 21, 2026 | Space Logistics | United States | — | — |
| Mission Extension Pod-22026-167C | Jul 21, 2026 | Space Logistics | United States | — | — |
| Mission Extension Pod-32026-167D | Jul 21, 2026 | Space Logistics | United States | — | — |
| Misty 11990-019B | Feb 28, 1990 | NRO | United States | Optical imaging | In orbit |
| Misty 21999-028A | May 22, 1999 | NRO | United States | Optical imaging | In orbit |
| MK-1TS2004-052C | Dec 24, 2004 | NKAU | Ukraine | Optical imaging | Reentered (orbital decay) |
| MKA PN22014-037B | Jul 8, 2014 | Lavochkin | Russia | Space science | In orbit |
| MKA-FKI 12012-039E | Jul 22, 2012 | Lavochkin | Russia | Space science | In orbit |
| Mobile Broadcasting Satellite2004-007A | Mar 13, 2004 | MBCO | Japan | Communications | Renamed |
| Mohammed VI - A2017-070A | Nov 8, 2017 | RMAF | Morocco | Optical imaging | In orbit |
| Mohammed VI - B2018-095A | Nov 21, 2018 | RMAF | Morocco | Optical imaging | In orbit |
| Molniya 1- 11965-030A | Apr 23, 1965 | OKB-10 | Soviet Union | Communications | Reentered (orbital decay) |
| Molniya 1- 21965-080A | Oct 14, 1965 | OKB-10 | Soviet Union | Communications | Reentered (orbital decay) |
| Molniya 1-111969-035A | Apr 11, 1969 | TsUKOS | Soviet Union | Communications | Reentered (orbital decay) |
| Molniya 1-31966-035A | Apr 25, 1966 | OKB-10 | Soviet Union | Communications | Reentered (orbital decay) |
| Monitor-E2005-032A | Aug 26, 2005 | Khrunichev | Russia | Optical imaging | Reentered (orbital decay) |
| Mono-Nikko2026-088H | Apr 23, 2026 | Di-Nikko | Japan | Technology | In orbit |
| Morelos 11985-048B | Jun 17, 1985 | SCT | Mexico | Communications | In orbit |
| Morelos 21985-109B | Nov 27, 1985 | SCT | Mexico | Communications | Renamed |
| Morelos 32015-056A | Oct 2, 2015 | AEMX | Mexico | Communications | In orbit |
| MOS-11987-018A | Feb 19, 1987 | NASDA | Japan | Optical imaging | In orbit |
| MOS-1b1990-013A | Feb 7, 1990 | NASDA | Japan | Optical imaging | In orbit |
| MOVE-II2018-099T | Dec 3, 2018 | Exseed Space | India | Technology | In orbit |
| MOVE-II2018-099Y | Dec 3, 2018 | TU Munchen | Germany | Technology | Reentered (orbital decay) |
| Mołnia 1-41966-092A | Oct 20, 1966 | OKB-10 | Soviet Union | Communications | Reentered (orbital decay) |
| MPF Cruise Stage1996-068 | Dec 4, 1996 | NASA | United States | — | Reentered (orbital decay) |
| MRC-1002023-084BV | Jun 12, 2023 | BME | Hungary | Signals intelligence | Reentered (orbital decay) |
| MRV-12026-167A | Jul 21, 2026 | Space Logistics | United States | — | — |
| MSAT 11996-022A | Apr 20, 1996 | TMI | Canada | Communications | Renamed |
| MSTI-11992-078A | Nov 21, 1992 | AF Phillips/GD | United States | Technology | Reentered (orbital decay) |
| MSTI-21994-028A | May 9, 1994 | AF Phillips/GD | United States | Technology | Reentered (orbital decay) |
| MSTI-31996-031A | May 17, 1996 | AF Phillips/GD | United States | Technology | Deorbited |
| MTCUBE2019-038K | Jul 5, 2019 | UTE | Ecuador | Technology | Reentered (orbital decay) |
| MTSat-1R2005-006A | Feb 26, 2005 | JAXA | Japan | Meteorology | In orbit |
| MTSat-22006-004A | Feb 18, 2006 | JCAB | Japan | Meteorology | In orbit |
| MUBLCOM1999-026B | May 18, 1999 | USA CECOM | United States | Communications | Collided |
| Muduo 1B2026-195F | Aug 25, 2026 | BNU | China | — | — |
| Multi-Application Survivable Tether2007-012K | Apr 17, 2007 | TUI | United States | Technology | In orbit |
| Multispectral Thermal Imager2000-014A | Mar 12, 2000 | Sandia Natl Labs | United States | Space science | Reentered (orbital decay) |
| Munin2000-075C | Nov 21, 2000 | IRF Kiruna | Sweden | Space science | In orbit |
| MUOS 12012-009A | Feb 24, 2012 | SPAWAR Pacific | United States | Communications | In orbit |
| MUOS 22013-036A | Jul 19, 2013 | SPAWAR Pacific | United States | Communications | In orbit |
| MUOS 32015-002A | Jan 21, 2015 | SPAWAR Pacific | United States | Communications | In orbit |
| MUOS 42015-044A | Sep 2, 2015 | SPAWAR Pacific | United States | Communications | In orbit |
| MUOS 52016-041A | Jun 24, 2016 | SPAWAR Pacific | United States | Communications | In orbit |
| Musket Ball1971-067D | Aug 7, 1971 | USAF STP | United States | Space science | Reentered (orbital decay) |
| Myojo1994-007B | Feb 3, 1994 | NASDA | Japan | Technology | In orbit, attached to another object |
Source: GCAT payload catalog (CC BY 4.0) and Wikidata (CC0).