EUTELSAT 7B

EUTELSAT 7B is a geostationary communications satellite operated by the European satellite operator Eutelsat. Launched on May 13, 2013, and built by Thales Alenia Space, it has remained continuously in orbit since that date, serving as a relay platform for television, broadband, and telecommunications traffic across a wide arc of the Eastern Hemisphere. Catalogued by the United States Space Surveillance Network under NORAD ID 39163 and the international designator 2013-022A, the spacecraft weighs approximately 5,470 kg and occupies a near-perfect geostationary slot above the equator at a longitude of 7° East.

Mission and Purpose

EUTELSAT 7B is a commercial communications satellite designed to deliver broadcast and data relay services to customers across Europe, North Africa, the Middle East, and Central Asia — a coverage footprint broadly typical of Eutelsat satellites positioned in the arc between 0° and 16° East. The satellite is a payload-class object, meaning it was placed in orbit specifically to carry telecommunications instruments rather than to serve a scientific, military, or experimental role.

The spacecraft's operational history is notable for an early orbital repositioning. When it was first commissioned, EUTELSAT 7B was stationed at the 3° East orbital slot, a position already occupied by other Eutelsat assets that collectively serve as an anchor point for the operator's European broadcasting business. Placing a newly arrived satellite at that slot was a practical step to expand capacity while it waited for a more permanent assignment. In 2014, following the launch of a successor satellite to take over duties at 3° East, EUTELSAT 7B was relocated westward to its current position at 7° East, where it has operated since.

The 7° East slot is a well-established geostationary position with significant commercial value, providing line-of-sight coverage to a broad swath of territory ranging from Western Europe eastward through Central Asia. From this vantage point, the satellite supports services including direct-to-home television distribution, corporate networking, and broadband connectivity for fixed and mobile users. Because mission-specific details such as the precise transponder configuration, frequency bands in use, and contracted customer base are not recorded in publicly available orbital catalogs, the granular service architecture of EUTELSAT 7B is not detailed here.

Orbit and Tracking

EUTELSAT 7B occupies a geostationary orbit, one of the most strategically important orbital regimes in the entire satellite industry. A geostationary orbit is achieved when a satellite's orbital period matches Earth's rotational period exactly, causing the satellite to appear motionless over a fixed point on the equator when viewed from the ground. This characteristic makes geostationary satellites ideal for broadcasting and telecommunications, since ground-based antennas can point at a fixed spot in the sky without needing to track a moving target.

The orbital parameters catalogued for EUTELSAT 7B reflect the precision required to maintain a stable geostationary position. Its apogee — the farthest point from Earth's center along its orbit — stands at 35,817 km, while its perigee — the closest point — is 35,772 km, giving a near-circular orbital ring with a difference of only 45 km between the two extremes. This very low eccentricity is characteristic of a well-maintained operational geostationary satellite. The inclination of 0.1° indicates that the satellite's orbital plane is nearly perfectly aligned with Earth's equatorial plane, deviating by only a tenth of a degree — a figure consistent with active station-keeping by onboard propulsion systems.

The orbital period of 1,436.1 minutes — just under 24 hours — is what locks the satellite into its apparent fixed position above 7° East longitude. This period is so close to Earth's sidereal rotation rate that any observer on the ground directly beneath the satellite's longitude would see it hang essentially stationary in the southern sky (in the Northern Hemisphere) or the northern sky (in the Southern Hemisphere) at an elevation determined by their latitude.

Station-keeping maneuvers — small thruster firings conducted periodically — are required to correct for perturbations caused by the gravitational pull of the Moon and Sun, solar radiation pressure, and Earth's slightly non-uniform gravitational field. These maneuvers are what keep the inclination near 0° and the satellite parked at its assigned longitude slot, preventing it from drifting into the slots of neighboring operators' satellites.

EUTELSAT 7B is tracked continuously by the U.S. Space Surveillance Network, and its two-line element sets are updated and publicly distributed through space-tracking databases, including those that feed sites like LowEarth. Because the satellite's orbital altitude is more than 35,000 km, tracking it serves primarily administrative, coordination, and collision-avoidance purposes rather than optical observation.

Design and Operator

EUTELSAT 7B was manufactured by Thales Alenia Space, a Franco-Italian aerospace company that is one of the world's leading builders of communications satellites and a frequent supplier to Eutelsat. Thales Alenia Space, jointly owned by the French group Thales and the Italian group Leonardo, has a long industrial heritage in large geostationary telecommunications platforms, and its spacecraft regularly appear in the Eutelsat fleet.

The satellite's launch mass of 5,470 kg places it squarely in the category of large geostationary telecommunications satellites. For context, the mass of a fully fueled communications satellite of this class typically includes a significant proportion of propellant used both for the apogee kick burn that circularizes the orbit after launch and for the years of station-keeping that follow. The dry mass — the spacecraft structure, electronics, and instruments stripped of fuel — would be considerably lower, but that figure is not publicly recorded in the orbital catalog entry.

The satellite was launched on May 13, 2013. The launch vehicle and launch site used for this mission are not specified in the available catalog record. Eutelsat, as the operator, is a Paris-based intergovernmental organization turned commercial company that owns and manages one of the world's largest fleets of geostationary satellites, providing services across Europe, Africa, the Middle East, and Asia. The company has been a major force in European satellite communications since the 1980s, progressively expanding its orbital arc and fleet size through both new builds and acquisitions.

Current Status and Significance

As of the information reflected in available orbital records, EUTELSAT 7B remains in orbit and has not undergone a decay or controlled reentry. Its current orbital parameters — the tightly bounded apogee and perigee, the near-zero inclination, and the 1,436.1-minute period — indicate a satellite that is still in or near an operational geostationary configuration rather than a drifting, end-of-life object. Active station-keeping would be required to maintain these figures over time.

Within the broader context of Eutelsat's fleet, EUTELSAT 7B represents a notable example of orbital flexibility: a satellite that began its life at one longitude slot before being reassigned to serve a different commercial need as the operator's fleet evolved. This kind of repositioning is a routine but logistically significant operation, requiring careful coordination with the International Telecommunication Union, neighboring satellite operators, and ground-station infrastructure teams.

The 7° East position into which EUTELSAT 7B eventually settled is adjacent to the 9° East slot, which carries some of Europe's highest-traffic broadcasting beams, and the surrounding arc is among the most congested in the geostationary belt. Operating successfully in such a neighborhood requires precise orbital control and radio-frequency coordination to avoid interference with adjacent satellites — a challenge that is managed through both engineering and international regulatory frameworks.

The commercial significance of a satellite like EUTELSAT 7B lies not in any unique technological innovation, but in the reliable, continuous service it provides to the broadcasting and telecoms industries across its coverage region. For millions of end users watching satellite television or relying on satellite-delivered data services across Europe, North Africa, the Middle East, and Central Asia, the presence of well-maintained geostationary assets at carefully managed orbital positions is a quietly essential piece of modern communications infrastructure. EUTELSAT 7B, in its station above 7° East, is one node in that global network.

Because EUTELSAT 7B orbits at geostationary altitude — more than 35,000 km above Earth's surface — it is far too faint and distant to be a rewarding target for casual naked-eye or even modest telescopic observation. Casual skywatchers are unlikely to detect it; the satellite is more relevant to the satellite-tracking community as a data point in the geostationary belt than as a visual observing target.