ARSAT 2

ARSAT-2 is an Argentine geostationary communications satellite built by the state-owned company INVAP and operated by ARSAT, the national satellite telecommunications company of Argentina. Carrying the NORAD catalog identifier 40941 and the international designator 2015-054B, it was launched in late September 2015 and has remained in geostationary orbit ever since. The satellite represents a significant milestone in Argentine aerospace history as the second domestically manufactured geostationary communications satellite the country has produced, following closely on the heels of its predecessor, ARSAT-1.

Mission and Purpose

ARSAT-2 was developed within Argentina's broader national satellite program, an initiative aimed at reducing the country's dependence on foreign satellite capacity for domestic telecommunications needs. Argentina, like many large South American nations, relies heavily on satellite infrastructure for television broadcasting, internet distribution, and telephone connectivity across vast stretches of territory that are difficult or expensive to serve through terrestrial networks alone. Having its own nationally manufactured and operated satellite assets gives the Argentine government and its designated operator a degree of strategic and commercial independence in managing those links.

The satellite is licensed to operate at the 81° West longitude geostationary orbital slot, a position that places it in a favorable arc for providing coverage across South America, Central America, and portions of North America. From this slot, ARSAT-2's communications payload can serve a wide geographic footprint, extending the reach of Argentine satellite capacity well beyond the country's own borders and into neighboring and regional markets.

The specific details of ARSAT-2's active mission status and exact payload configuration are not fully enumerated in public tracking catalogs, though it is understood from its design lineage that it carries a communications payload distinct from that of ARSAT-1, with an antenna configuration suited to its particular coverage and frequency requirements. The operational mission type and current status are not formally recorded in the public satellite catalog entry for this object.

Orbit and Tracking

ARSAT-2 occupies a near-perfect geostationary orbit, as reflected in its tracked orbital parameters. Its apogee stands at 35,804 km and its perigee at 35,784 km, giving it an extremely circular orbit with a difference of only 20 km between its highest and lowest points. This near-circularity is a hallmark of a well-maintained geostationary satellite. Its orbital inclination is recorded at 0.0°, meaning it travels almost precisely along the equatorial plane, and its orbital period is 1,436.1 minutes — very close to the 24-hour rotational period of the Earth. Together, these parameters mean that from the ground, the satellite appears essentially stationary above a fixed point on the equator, making it ideal for the continuous, uninterrupted communications links that broadcasting and telecommunications services require.

Because ARSAT-2 maintains a fixed apparent position relative to the Earth's surface, it does not pass overhead in the way that low Earth orbit satellites do. Ground stations and dish antennas can be pointed at a fixed azimuth and elevation toward the satellite's location in the sky and left there indefinitely without needing to track a moving target. This characteristic is one of the fundamental advantages of the geostationary orbit for communications applications, despite the significant altitude involved and the associated signal propagation delays.

The satellite has been tracked continuously since its launch and remains in orbit as of the most recent catalog data, with no decay or reentry date recorded. Its NORAD catalog ID of 40941 allows it to be monitored through standard space surveillance networks, and its position and orbital elements are regularly updated in public tracking databases.

Design and Operator

ARSAT-2 was designed and manufactured by INVAP, a company based in Bariloche, Argentina, that operates under the provincial government of Río Negro and has a long history of developing nuclear reactors, radar systems, and space hardware. INVAP's role in producing two successive geostationary satellites for Argentina represents a significant achievement for a company that built up its aerospace engineering capabilities over several decades before tackling the complex discipline of full geostationary satellite development.

Structurally and mechanically, ARSAT-2 is closely derived from ARSAT-1. The two satellites share the same basic platform design, meaning the structural bus, power systems, and propulsion architecture are essentially the same between them. The distinction lies in the communications payload — the transponders, antennas, and associated electronics that perform the actual mission — which differs between the two spacecraft to accommodate different coverage areas, frequency plans, and service requirements. This approach of reusing a validated platform design while varying the payload is a common and cost-effective strategy in commercial satellite development, as it reduces risk and development time by building on a proven heritage.

ARSAT, the operating entity, is a state-owned enterprise established by the Argentine government to manage the country's orbital resources and provide satellite services. It holds the spectrum and orbital slot licenses associated with ARSAT-2 and is responsible for the satellite's day-to-day commercial and operational management.

The launch of ARSAT-2 was carried out from the Guiana Space Centre in French Guiana, the primary commercial launch facility operated by Arianespace in South America. It was lofted by an Ariane 5ECA rocket, the workhorse heavy-lift vehicle of European commercial launch services, which carried it to a geostationary transfer orbit from which the satellite's own propulsion system would have raised it to its final geostationary station. ARSAT-2 shared its ride to orbit with Sky Muster, an Australian communications satellite, in a dual-manifest configuration typical of Ariane 5 missions. The launch took place on September 30, 2015 at 20:30 UTC, which corresponded to the evening of September 29 in the Eastern Daylight Time zone — hence the launch date of September 29 reflected in its catalog record under that time zone offset.

Significance and Legacy

The launch of ARSAT-2 cemented Argentina's position as one of a small number of developing nations to have successfully designed, manufactured, and operated geostationary communications satellites using domestically developed technology. Reaching geostationary orbit requires not only the ability to build a complex spacecraft that can survive the thermal, vacuum, and radiation environment of deep space for a service life measured in years or decades, but also mastery of the orbital mechanics, propulsion, and ground control systems necessary to maneuver a spacecraft from its initial transfer orbit into its precise operational slot. That Argentina accomplished this twice in rapid succession, with two satellites built by the same national company, underscored the maturity of the country's space industrial base.

The launch was also notable in the broader context of commercial spaceflight history. ARSAT-2 was the payload designated as the 400th satellite launched by Arianespace, marking a milestone for the European launch consortium that has been a dominant force in commercial satellite launch services since the early 1980s. Being associated with that particular milestone placed ARSAT-2 in the record books not only for Argentina but for the global space industry as well.

For Argentina specifically, the ARSAT satellite program represents a long-term national investment in sovereign space capability. By controlling its own geostationary assets rather than relying entirely on leased capacity aboard foreign satellites, Argentina retains direct authority over critical national communications infrastructure. This has implications not only for commercial telecommunications but also for broadcasting, government communications, and the country's ability to maintain connectivity across its large and geographically diverse territory, including remote Patagonian regions and the Falkland Islands area.

The satellite's mass is not recorded in current public catalog data, and detailed information about its remaining propellant reserves or projected operational lifespan is not publicly available through the standard tracking record. ARSAT-2 remains catalogued as an active payload in geostationary orbit, continuing to occupy its assigned slot and contribute to Argentina's national satellite communications infrastructure.

How to Observe ARSAT-2

As a geostationary satellite, ARSAT-2 is not observable in the traditional sense of watching a moving point of light cross the night sky. It remains fixed at approximately 81° West longitude along the geostationary arc, appearing stationary relative to the Earth's surface at an altitude of roughly 35,800 km above the equator. From mid-latitudes in South America or North America, it will appear as a faint, unmoving point in the southern sky — indistinguishable to the naked eye from a distant star — at an elevation angle that depends on the observer's latitude and longitude relative to the satellite's sub-satellite point. Optical identification of geostationary satellites generally requires a telescope and knowledge of the precise sky coordinates corresponding to the satellite's fixed position, and even then such objects are typically very faint. For most practical purposes, ARSAT-2 is a tracking target of interest to engineers, operators, and researchers rather than casual observers.