SES-10

SES-10 is a commercial geostationary communications satellite owned and operated by Luxembourg-based satellite fleet operator SES S.A. Launched on 29 March 2017, the spacecraft occupies a fixed orbital slot above the equator and delivers telecommunications services across Latin America. It carries NORAD catalog identifier 42432 and the international designator 2017-017A, confirming it as the primary payload of its launch campaign. As of the time of writing, SES-10 remains operational in geostationary orbit.

Mission and Purpose

The contract to build SES-10 was awarded in February 2014, giving Airbus Defence and Space the mandate to design and construct a high-capacity communications platform intended primarily to serve Latin American markets. The satellite was positioned at 67° West longitude, a slot made available through a formal arrangement with the Andean Community, which granted SES access to the Simón Bolívar-2 satellite network filing. This agreement allowed SES to occupy a strategically valuable orbital position that provides broad coverage across South America, the Caribbean, and surrounding regions.

In functional terms, SES-10 was designed to replace two earlier satellites — AMC-3 and AMC-4 — that had served the region under a prior generation of infrastructure. Rather than simply maintaining an equivalent level of service, SES-10 was conceived as a significant upgrade, offering expanded capacity and enhanced coverage compared to the spacecraft it succeeded. The transition allowed customers dependent on those older platforms to migrate to a more capable, modern system without a disruptive gap in service.

The specific payload configuration and the number of transponders aboard are not recorded in publicly available catalog data, and accordingly those figures are not stated here. What is well established, however, is that the satellite operates in the C-band and Ku-band frequency ranges typical of commercial broadcast and broadband communication satellites of its generation, supporting television distribution, broadband connectivity, and enterprise networking services across its coverage footprint.

Orbit and Tracking

SES-10 occupies a near-perfect geostationary orbit, one of the most precisely maintained and operationally significant orbital regimes in use today. Geostationary orbit places a satellite at an altitude of approximately 35,786 kilometers above the equator, where the orbital period matches Earth's rotation period and the satellite appears to hover at a fixed point in the sky as seen from the ground. This characteristic makes geostationary satellites ideal for communications and broadcast applications, as ground-based antennas can be aimed at a fixed point without needing to track a moving target.

The tracked orbital parameters for SES-10 confirm its residence in this regime. Its apogee stands at 35,807 kilometers and its perigee at 35,782 kilometers, giving an orbit that is nearly circular, with a difference of only 25 kilometers between the highest and lowest points — a figure that is negligible at these altitudes and reflects the precision of modern station-keeping. The orbital inclination is recorded as 0.0°, confirming the satellite's equatorial alignment. The orbital period is 1,436.1 minutes, or approximately 23 hours and 56 minutes, which corresponds closely to one sidereal day — the true rotation period of Earth relative to the stars — and is the defining characteristic of a geostationary orbit.

Tracked under NORAD catalog ID 42432 and COSPAR designator 2017-017A, SES-10 is regularly updated in the space surveillance catalog maintained by the United States Space Force. Its orbital elements are published and accessible through standard two-line element (TLE) sets, which allow satellite-tracking software to compute its precise position at any given moment. Because the satellite is essentially stationary relative to the Earth's surface, its ground track remains fixed at 67° West longitude, directly above the equator.

The satellite has a launch mass of 5,300 kilograms, placing it firmly in the category of large geostationary communications platforms. Such spacecraft typically carry substantial fuel reserves to sustain station-keeping maneuvers throughout a design lifetime of fifteen years or more, gradually expending propellant to counteract the gravitational perturbations from the Moon, Sun, and Earth's non-uniform mass distribution that would otherwise cause the satellite to drift.

Design and Operator

SES-10 was designed and built by Airbus Defence and Space, one of the world's leading commercial satellite manufacturers, on the Eurostar-3000 satellite bus. The Eurostar-3000 is a well-established platform that has been used for numerous large geostationary communications satellites since its introduction. It is characterized by its modular architecture, high power output, and capacity to accommodate a wide variety of communication payloads. The platform has a strong heritage record in commercial satellite operations, and its selection for SES-10 reflects both the maturity of the design and the confidence SES placed in Airbus as a prime contractor.

SES S.A., headquartered in Betzdorf, Luxembourg, is among the largest commercial satellite operators in the world by fleet size and orbital capacity. The company manages satellites across both geostationary and medium Earth orbits, serving customers including broadcasters, telecommunications providers, governments, and internet service companies. SES has historically operated a large number of assets over the Americas under various brand names and orbital slot agreements, and SES-10 fits into a long-term strategy of maintaining competitive, high-capacity coverage across Latin America in particular.

The ownership of SES-10 is attributed to SES as a corporate entity, with Luxembourg as the national registration context, though operational and commercial relationships span multiple countries and jurisdictions. The satellite's registration under the Simón Bolívar-2 network filing reflects the regulatory framework that governs how orbital slots and frequency assignments are coordinated through the International Telecommunication Union, where national administrations file on behalf of operators.

Launch and Historical Significance

The launch of SES-10 on 29 March 2017 was notable beyond the satellite itself. It was carried to orbit by a SpaceX Falcon 9 rocket, and the mission marked the first time that SpaceX flew a commercial payload on a previously flown orbital-class rocket booster. The first stage used for this mission had previously launched the CRS-8 cargo resupply mission to the International Space Station in April 2016. The successful reuse and recovery of that booster was widely regarded as a significant milestone in the development of reusable launch vehicles, and SES-10 occupies a unique position in spaceflight history as the commercial satellite that anchored that demonstration. The rocket's first stage was successfully recovered on a drone ship in the Atlantic Ocean following the launch, reinforcing the viability of booster reuse for operational missions.

This context does not change what SES-10 is functionally — a large commercial communications satellite serving Latin American markets — but it means the spacecraft is frequently referenced in discussions of launch vehicle development as well as in the broader history of commercial space. The satellite and the launch that carried it are intertwined in the historical record in a way that is relatively uncommon for commercial payloads.

Current Status

SES-10 remains in orbit as of the current catalog record, with no decay or reentry date logged. Satellites in geostationary orbit do not naturally decay on observable timescales; without active deorbiting maneuvers, a spacecraft placed there will remain for thousands of years. End-of-life procedures for geostationary satellites typically involve using residual propellant to raise the spacecraft into a slightly higher "graveyard orbit," approximately 300 kilometers above the geostationary belt, removing it from the congested operational zone and reducing the risk of collision or interference with active assets.

Whether SES-10 remains fully operational, has been partially decommissioned, or is approaching end-of-life is not definitively stated in the publicly available catalog data, and accordingly those details are not confirmed here. What the orbital parameters do confirm is that the spacecraft is still present in geostationary orbit, maintaining its position at 67° West with the near-circular, zero-inclination trajectory consistent with an actively station-kept satellite or one recently placed in a graveyard orbit. Observers and researchers tracking the commercial geostationary arc will find SES-10 a consistent fixture in the catalog at its designated location above the equator, continuing to represent a significant investment in Latin American communications infrastructure and a landmark moment in the history of launch vehicle reuse.