Mars Orbiter Mission (MOM), unofficially known as Mangalyaan (Sanskrit: Maṅgala 'Mars', Yāna 'Craft, Vehicle'), is a space probe orbiting Mars since 24 September 2014. It was launched on 5 November 2013 by the Indian Space Research Organisation (ISRO). It was India's first interplanetary mission and it made ISRO the fourth space agency to achieve Mars orbit, after Soviet space program, NASA, and the European Space Agency. It made India the first Asian nation to reach Martian orbit. It also made ISRO the first national space agency in the world to do so with an indigenously developed propulsion system and the second national space agency to succeed on its maiden attempt, after the European Space Agency accomplished this in 2003 using a Roscosmos Soyuz/Fregat rocket.
The Mars Orbiter Mission probe lifted off from the First Launch Pad at Satish Dhawan Space Centre (Sriharikota Range SHAR), Andhra Pradesh, using a Polar Satellite Launch Vehicle (PSLV) rocket C25 at 09:08 (UTC) on 5 November 2013. The launch window was approximately 20 days long and started on 28 October 2013. The MOM probe spent about a month in Earth orbit, where it made a series of seven apogee-raising orbital maneuver before trans-Mars injection on 30 November 2013 (UTC). After a 298-day transit to Mars, it was put into Mars orbit on 24 September 2014.
The mission was a technology demonstrator project to develop the technologies for designing, planning, management, and operations of an interplanetary mission. It carried five scientific instruments. The spacecraft was monitored from the Spacecraft Control Centre at ISRO Telemetry, Tracking and Command Network (ISTRAC) in Bengaluru with support from the Indian Deep Space Network (IDSN) antennae at Bengaluru, Karnataka.
On 2 October 2022, it was reported that the orbiter had irrecoverably lost communications with Earth after entering a seven-hour eclipse period in April 2022 that it was not designed to survive. The following day, ISRO released a statement that all attempts to revive MOM had failed and officially declared it dead. The loss of fuel preventing the attitude adjustment of the spacecraft required to sustain battery power to the probe's instruments had been discussed at an ISRO conference on September 27 commemorating the spacecraft's eight-year anniversary of insertion into Mars orbit.
In November 2008, the first public acknowledgement of an uncrewed mission to Mars was announced by then-ISRO chairman G. Madhavan Nair. The MOM mission concept began with a feasibility study in 2010 by the Indian Institute of Space Science and Technology after the launch of lunar satellite Chandrayaan-1 in 2008. Prime Minister Manmohan Singh approved the project on 3 August 2012, after ISRO completed ₹125 crore (US$13 million) of required studies for the orbiter. The total project cost may be up to ₹454 crore (US$47 million). The satellite costs ₹153 crore (US$16 million) and the rest of the budget has been attributed to ground stations and relay upgrades that will be used for other ISRO projects.
Assembly of the PSLV-XL launch vehicle, designated C25, started on 5 August 2013. The mounting of the five scientific instruments was completed at U. R. Rao Satellite Centre, Bengaluru, and the finished spacecraft was shipped to Sriharikota on 2 October 2013 for integration to the PSLV-XL launch vehicle. The satellite's development was fast-tracked and completed in a record 15 months, partly due to using reconfigured Chandrayaan-2 orbiter bus.
Despite the US federal government shutdown, NASA reaffirmed on 5 October 2013 it would provide communications and navigation support to the mission "with their Deep Space Network facilities.".The space agency had planned the launch on 28 October 2013 but was postponed to 5 November following the delay in ISRO's spacecraft tracking ships to take up pre-determined positions due to poor weather in the Pacific Ocean. Launch opportunities for a fuel-saving Hohmann transfer orbit occur every 26 months, in this case the next two would be in 2016 and 2018.
During a meeting on 30 September 2014, NASA and ISRO officials signed an agreement to establish a pathway for future joint missions to explore Mars. One of the working group's objectives will be to explore potential coordinated observations and science analysis between the MAVEN orbiter and MOM, as well as other current and future Mars missions.
On 2 October 2022, it was reported that the orbiter had irrecoverably lost communications with Earth after entering long eclipse period in April 2022 that it was not designed to survive. At the time of communications loss it was unknown whether the probe had lost power or inadvertently realigned its Earth-facing antenna during automatic maneuvers.
Some of the scientists of ISRO and engineers involved in the mission include:
K. Radhakrishnan led as Chairman ISRO.
Mylswamy Annadurai was the Programme Director and was in charge of the overall project, budget management as well as direction for spacecraft configuration, schedule and resources.
V Kesava Raju was the Mars Orbiter Mission Director.
Subbiah Arunan was the Project Director at the Mars Orbiter Mission.
BS Kiran was the Associate Project Director of Flight Dynamics.
V Koteswara Rao was the ISRO scientific secretary.
Chandradathan was the Director of the Liquid Propulsion System.
R.Satish was the Deputy Project Director of Spacecraft Mechanical Systems.