INTELSAT 11 (IS-11)

Intelsat 11 (IS-11) is a geostationary communications satellite operated by Intelsat, one of the world's largest commercial satellite fleet operators. Catalogued under NORAD ID 32253 and international designator 2007-044B, the spacecraft was launched on October 4, 2007, and has remained in orbit ever since, serving as a communications relay platform primarily for markets across the Americas. It occupies the geostationary arc at 43.0° West longitude, a position that provides favorable coverage geometry over North America, South America, and portions of the Atlantic basin.

Mission and Purpose

Intelsat 11 was positioned to carry on commercial telecommunications services that its predecessor at the same orbital slot had been providing as that spacecraft approached the end of its operational design life. The satellite it replaced, Intelsat 3R, had served reliably in the geostationary belt, but like all spacecraft it had finite onboard propellant and component lifespans. Deploying Intelsat 11 to the same longitude ensured continuity of service for customers who had built ground infrastructure and frequency agreements around that particular slot in the geostationary arc.

The 43.0° West longitude position is commercially significant. Geostationary satellites parked over the Atlantic at this location have a clear line of sight to densely populated regions spanning from the eastern seaboard of North America through Central America and down into South America, including Brazil and the broader Southern Cone. This geometry makes the slot well suited for broadband internet distribution, broadcast television, corporate data networks, and government telecommunications — all services that Intelsat has historically carried across its global fleet. The satellite was originally developed under the designation PAS-11, reflecting an earlier era when the PanAmSat brand and network were being integrated into Intelsat following a major corporate consolidation in the mid-2000s. After that merger was completed, the spacecraft was rebranded under the Intelsat naming convention, becoming Intelsat 11 as it entered operational service.

While the specific payload configuration and transponder count for Intelsat 11 are not publicly recorded in the tracking catalog, the satellite's STAR-2 platform heritage — developed by Orbital Sciences Corporation — is associated with mid-sized geostationary communications satellites carrying C-band and Ku-band transponders. Such frequency combinations are typical for satellites serving the mixed commercial broadcasting and data relay demands of the Americas region.

Orbit and Tracking

Intelsat 11 occupies a near-circular geostationary orbit with an apogee of 36,146 km and a perigee of 36,135 km above Earth's surface. The difference of roughly 11 km between these two figures indicates an orbit that is very slightly elliptical but functionally circular for all practical purposes, as is expected for a properly station-kept geostationary asset. The orbital period stands at 1,453.8 minutes — approximately 24.2 hours — which is close to but not precisely matching Earth's sidereal rotation period. This minor discrepancy is typical of real-world geostationary satellites and is continuously corrected through station-keeping maneuvers using onboard propellant, which keeps the spacecraft locked to its designated longitude.

The inclination of 3.5° is a notable figure. A perfectly controlled geostationary satellite would ideally have an inclination of 0°, meaning its orbital plane lies exactly in Earth's equatorial plane and the satellite appears fixed relative to a ground observer. An inclination of 3.5° means Intelsat 11 traces a small figure-eight pattern — known as an analemma — in the sky as seen from the ground, drifting a few degrees north and south of the equatorial plane over the course of each sidereal day. This behavior is often an indicator that north-south station-keeping maneuvers, which consume significant propellant, have been reduced or suspended. Operators sometimes make this trade-off deliberately as a satellite ages, preserving remaining fuel for east-west station-keeping or for a controlled end-of-life disposal maneuver. It does not necessarily indicate that the spacecraft has become non-functional; many satellites continue to provide commercial services under inclined orbit operations, with ground stations using tracking antennas to follow the daily motion.

As a geostationary payload, Intelsat 11 is too dim to observe with the naked eye under typical conditions, appearing as a faint, slow-moving or apparently stationary point of light only in telescopes or sensitive cameras. It resides in the geostationary belt at an altitude far above low Earth orbit, where visual satellite-spotting is most commonly practiced.

Design and Operator

Intelsat 11 was constructed by Orbital Sciences Corporation on the STAR-2 satellite bus. Orbital Sciences, which was later acquired by Northrop Grumman, developed the STAR-2 platform as a mid-class geostationary communications satellite design intended to offer competitive payload capacity while keeping mass and cost within ranges attractive to commercial operators. The specific mass of Intelsat 11 at launch or on orbit is not recorded in the public tracking catalog.

The spacecraft was delivered to orbit by an Ariane 5 GS launch vehicle, operated by Arianespace from the Guiana Space Centre at Kourou, French Guiana. The Ariane 5 GS was a variant of the Ariane 5 family optimized for geostationary transfer orbit missions and was the workhorse of European commercial launch services during that period. From geostationary transfer orbit, Intelsat 11 would have used its onboard apogee kick motor to raise its orbit to the final geostationary altitude and circularize.

Intelsat itself is a long-established commercial satellite operator with roots stretching back to the intergovernmental satellite consortium founded in 1964. By 2007, when Intelsat 11 launched, the organization had long since transitioned to private commercial ownership and operated one of the largest fleets of communications satellites in the world. The integration of the former PanAmSat fleet — which brought the PAS-11 satellite into the Intelsat family — significantly expanded Intelsat's capacity and geographic reach, particularly over the Americas. The 43.0° West slot, inherited from the PanAmSat era, became a continued asset in Intelsat's Atlantic coverage strategy.

The country of registry for Intelsat 11, as listed in satellite tracking catalogs, reflects Intelsat's status as an international commercial operator rather than a national government entity. For cataloguing purposes, the ownership is attributed directly to Intelsat as an organization.

Status and Significance

Intelsat 11 was classified as a payload object — as opposed to a rocket body or debris fragment — and as of the current tracking data, it remains in orbit. This makes it one of many mid-2000s-era geostationary satellites still present in the arc, whether actively operating, placed in storage, or continuing service in inclined orbit mode.

The satellite's position at 43.0° West has remained a commercially contested and active longitude in the geostationary arc. Demand for satellite communications capacity over the Americas did not diminish during the years following Intelsat 11's launch; if anything, growing demand for broadband and broadcast services across Latin America increased the strategic value of well-situated Atlantic slots. Whether Intelsat 11 itself continues to carry live traffic or has been superseded at that slot by newer, higher-capacity spacecraft is not confirmed in the public tracking record.

The satellite's 3.5° orbital inclination, as noted above, is a meaningful data point for those monitoring its operational posture. Satellites that are actively generating commercial revenue for their operators typically justify the propellant cost of maintaining a low inclination, since most commercial fixed satellite service antennas are not designed to track a moving target. An inclined orbit usually, though not universally, suggests a spacecraft is in the later stages of its operational life, operating in a reduced-service configuration, or has been retired from primary commercial use while remaining in orbit pending eventual disposal.

Intelsat 11 launched at a moment when the commercial geostationary satellite industry was undergoing significant structural change — consolidations among operators, growing competition from newer very high throughput satellite (VHTS) designs, and the beginnings of discussions about low Earth orbit broadband constellations. It represents a generation of mid-class communications satellites that formed the backbone of commercial satellite services through the late 2000s and 2010s.

For researchers and satellite trackers, Intelsat 11 is accessible in public catalogs under NORAD ID 32253 and COSPAR designator 2007-044B. Its position in the geostationary belt at approximately 43° West makes it identifiable in orbital element sets and trackable by ground stations and amateur observers with appropriate equipment pointed at the geostationary arc. As with all objects in the geostationary ring, it moves in apparent synchrony with Earth's rotation, appearing essentially stationary above the equator as seen from fixed ground locations within its coverage footprint.