INTELSAT 19 (IS-19)

Intelsat 19 (IS-19) is a commercial geostationary communications satellite operated by Intelsat, one of the world's largest fixed satellite service providers. Catalogued by the United States Space Surveillance Network under NORAD ID 38356 and carrying the international designator 2012-030A, the spacecraft was lofted into orbit on 31 May 2012 (UTC: 1 June 2012 at 05:22:59) aboard a Zenit-3SL rocket launched from the Sea Launch platform. It remains in operation today, parked in geostationary orbit above the Pacific Ocean region at 166° East Longitude, where it serves telecommunications traffic across a wide swath of the Asia-Pacific and Oceania.

Mission and Purpose

Intelsat 19 was positioned to continue and expand the connectivity services previously provided by its predecessor at the 166° East orbital slot. Upon entering service, it took over from Intelsat 8, extending coverage across a region that includes Australia, New Zealand, the Pacific Island nations, East Asia, and parts of Southeast Asia. Geostationary communications satellites at this longitude are especially valuable for linking the dispersed island communities of the Pacific with broader international telecommunications networks, as well as providing backbone capacity for broadcast, broadband, and enterprise services throughout the Asia-Pacific corridor.

The satellite supports a range of commercial services typical of a large geostationary fixed satellite service (FSS) platform. These include direct-to-home television broadcasting, broadband internet delivery, maritime and aeronautical communications, and corporate data networking. The 166° East position places IS-19 in a particularly strategic arc: it has line-of-sight coverage not only over continental Australia and the major island groups of the South and Central Pacific, but also northward into Japan, Korea, and coastal China. This geographic reach makes the orbital slot commercially important for operators seeking to bridge multiple regions with a single spacecraft.

While the catalog entry for IS-19 does not specify the precise payload configuration or the number of transponders publicly, satellites based on the LS-1300 bus — the platform on which IS-19 was constructed by Space Systems/Loral — are widely known to be capable of carrying substantial transponder complements operating across C-band, Ku-band, and in some variants Ka-band frequencies. The flexibility of this bus has made it a common choice for large commercial operators requiring high-power, multi-beam payloads.

Orbit and Tracking

Intelsat 19 occupies a near-perfect geostationary orbit, as reflected in the tracking data maintained in the LowEarth catalog. Its apogee stands at approximately 35,807 km and its perigee at approximately 35,782 km above Earth's surface, yielding an orbital eccentricity so small that the satellite's altitude barely varies over the course of a single orbit. Its inclination is recorded at 0.0°, confirming that it moves in a plane essentially coincident with Earth's equatorial plane — the defining characteristic of a true geostationary orbit.

The orbital period of 1,436.1 minutes is almost exactly equal to one sidereal day, meaning the satellite completes precisely one orbit for every one rotation of the Earth beneath it. The practical consequence is that IS-19 appears effectively stationary when viewed from the ground, hovering perpetually over a fixed point above the equator at 166° East. This fixed apparent position is not accidental — it is the fundamental requirement that makes geostationary satellites so useful for continuous, wide-area communications without the need for tracking antennas at ground stations.

Maintaining a geostationary position requires periodic station-keeping maneuvers using onboard propulsion. Natural perturbations — gravitational influences from the Moon and Sun, solar radiation pressure, and the slight oblateness of the Earth — would otherwise cause the satellite to drift over time. Ground controllers routinely command small thruster firings to correct these tendencies and keep IS-19 within its assigned longitudinal box at 166° East. The spacecraft has been in continuous orbit since its launch in 2012 and, as of the time of publication, has not undergone atmospheric reentry.

Because IS-19 is in geostationary orbit at an altitude of approximately 35,800 km, it is far beyond the reach of low Earth orbit tracking metrics and is not a candidate for naked-eye observation under ordinary circumstances. Its NORAD catalog entry (38356) allows professional and amateur satellite trackers to compute its position precisely using standard two-line element (TLE) data, though for a geostationary satellite this amounts principally to confirming its fixed apparent longitude in the sky rather than tracking a moving target.

Design and Operator

Intelsat 19 was manufactured by Space Systems/Loral (SS/L), a major American satellite manufacturer with a long track record of building large commercial communications platforms. The satellite is based on the LS-1300 bus, SS/L's flagship geostationary spacecraft platform. The LS-1300 is a modular, high-power design capable of accommodating a wide variety of payload configurations, and has been used for dozens of commercial and government satellites over the years. Its heritage provides substantial confidence in on-orbit reliability and longevity. The LowEarth catalog does not record the launch mass of IS-19, so that figure is not stated here.

The launch was conducted by Sea Launch, a commercial launch service that operated from a purpose-built ocean-based platform in the equatorial Pacific. Sea Launch used the Zenit-3SL launch vehicle — a three-stage rocket consisting of a Ukrainian-built Zenit-2 core and an upper stage derived from the Russian Blok DM series — to deliver the satellite directly to geostationary transfer orbit. Launching from a platform positioned near the equator gave the Zenit-3SL a performance advantage over launches from higher latitudes, as it could take fuller advantage of Earth's rotational velocity to reduce the propellant required to achieve the necessary orbital parameters.

Intelsat itself is one of the oldest and most extensive satellite fleet operators in the world, tracing its origins to an intergovernmental organization established in the 1960s before being privatized in the early 2000s. The company operates a global fleet of geostationary satellites spanning multiple orbital slots across all longitude sectors, providing connectivity to broadcasters, telecommunications carriers, governments, maritime operators, and enterprises worldwide. IS-19 represents one node in this global network, specifically anchoring the company's presence in the Pacific arc.

Current Status and Significance

Intelsat 19 entered a particularly notable chapter of its operational life not long after launch when a partial power anomaly was reported — an issue linked to solar array performance that affected the satellite's available power and, by extension, the capacity it could offer to some customers. This kind of on-orbit anomaly, while significant commercially, did not result in total loss of the spacecraft, and Intelsat continued to operate IS-19 on a managed basis. The catalog entry does not specify current mission status, and detailed operational history beyond what is widely documented is not reproduced here.

Regardless of any partial service constraints, IS-19's continued presence in geostationary orbit at 166° East underscores the importance of that slot to Intelsat's Pacific strategy. Orbital slots in geostationary arc are finite and internationally coordinated resources, regulated through the International Telecommunication Union's Radio Regulations. Holding and actively operating a satellite at a given slot preserves that coordination right for the operator, making the continued use of an asset like IS-19 strategically significant beyond its raw capacity contribution.

From a historical perspective, IS-19 is part of a generation of large commercial geostationary platforms launched in the late 2000s and early 2010s that substantially expanded the global communications infrastructure. Satellites built on the LS-1300 and similar buses during this era typically have design lifetimes in the range of fifteen years or more, meaning IS-19 may be expected to remain a going concern well into the 2020s, assuming adequate fuel reserves for continued station-keeping. Whether its operational tenure has been extended, curtailed, or modified since launch is a matter for current operator disclosures rather than catalog inference.

As a geostationary payload at over 35,000 km altitude, Intelsat 19 is not visible to the naked eye and does not produce observable passes in the way that low Earth orbit satellites do. Dedicated observers using moderate-aperture telescopes and precise pointing coordinates derived from TLE data can locate geostationary satellites as faint, stationary points of light against the star field, but this is a specialized pursuit distinct from conventional satellite spotting. The NORAD ID 38356 and COSPAR designator 2012-030A remain the primary identifiers for anyone wishing to retrieve current orbital elements and verify the spacecraft's catalogued position through standard space surveillance databases.