ASIASAT 9

AsiaSat 9, also catalogued under NORAD ID 42942 and international designator 2017-057A, is a geostationary communications satellite operated by the Asia Satellite Telecommunications Company, widely known as AsiaSat. Launched in late September 2017, the spacecraft occupies a fixed position above the equator and forms part of the operator's regional fleet serving broadcasting, broadband, and telecommunications customers across Asia and the Pacific. The satellite is also associated with the Thaicom 7 designation, reflecting shared or coordinated arrangements with Thai telecommunications interests. As of the time of writing, AsiaSat 9 remains operational in geostationary orbit and has not undergone atmospheric reentry.

Mission and Purpose

AsiaSat 9 was developed to serve the growing demand for satellite-based communications across a broad swathe of the Asia-Pacific region, a market characterized by rapidly expanding data consumption, diverse broadcasting requirements, and geographically dispersed populations that are often difficult to reach through terrestrial infrastructure alone. Geostationary satellites like AsiaSat 9 are particularly well suited to these conditions: because they remain stationary relative to a point on Earth's surface, ground-based antennas can be fixed in a single direction without the need for tracking mechanisms, greatly simplifying deployment of receiving equipment in remote or rural areas.

The specific payload configuration and transponder complement of AsiaSat 9 are not publicly detailed in the official orbital catalog entry, and mission type and operational status are listed as unknown in the tracking record. However, AsiaSat has historically operated satellites offering both Ku-band and C-band transponder capacity, enabling a mix of direct-to-home television distribution, VSAT (Very Small Aperture Terminal) broadband networks, and carrier-grade telecommunications services. The satellite's substantial mass of 6,140 kilograms is consistent with a large, multi-mission communications platform capable of housing extensive onboard power generation and a wide array of transponders.

The Thaicom 7 association with this spacecraft points to a capacity-sharing or co-ownership arrangement, a common commercial structure in the satellite industry where orbital slot rights, frequency allocations, or transponder capacity are divided between multiple operators or national entities. Thailand's Thaicom designation suggests a portion of the satellite's capacity is dedicated to serving Thai domestic and regional communications needs, though the precise contractual details of this arrangement remain outside the scope of the publicly available orbital record.

Orbit and Tracking

AsiaSat 9 occupies a position in the geostationary belt, the ring of orbital slots approximately 35,786 kilometers above Earth's equator where a satellite's orbital velocity matches the planet's rotational rate. At this altitude, the spacecraft appears to hover motionless over a fixed geographic longitude when viewed from the ground, a property that makes geostationary orbit the preferred location for broadcast and broadband relay satellites.

The tracking data recorded for AsiaSat 9 reflects this regime precisely. The satellite's apogee stands at 35,805 kilometers and its perigee at 35,785 kilometers, a difference of only 20 kilometers that indicates an exceptionally circular orbit — essentially the near-perfect circular profile expected of an operational geostationary satellite that has completed its transfer phase and is settled into its station-kept slot. The orbital inclination is recorded at 0.0 degrees, meaning the satellite's orbital plane is aligned virtually perfectly with Earth's equatorial plane, producing no measurable north-south drift across the course of a day. The orbital period is 1,436.2 minutes, which corresponds closely to one sidereal day and confirms the synchronous relationship between the satellite's revolution and Earth's rotation that defines geostationary behavior.

Objects in geostationary orbit are tracked by a global network of ground-based radar and optical sensors and assigned catalog entries in the United States Space Force's Space Surveillance Network. AsiaSat 9's NORAD catalog ID of 42942 is the permanent numerical identifier by which the object is indexed in this system, while its COSPAR designator, 2017-057A, encodes the launch year (2017), the sequential launch number within that year (57th catalogued launch event), and the suffix A indicating it was the primary payload of that launch. Together, these identifiers allow operators, researchers, and tracking platforms to unambiguously distinguish AsiaSat 9 from the thousands of other objects catalogued in Earth orbit.

Design and Operator

AsiaSat 9 was manufactured by Lanteris Space Systems and has an on-orbit mass of 6,140 kilograms. This mass figure places the spacecraft firmly in the category of large commercial communications satellites, which typically range from a few thousand to over six thousand kilograms. A satellite of this size generally carries substantial solar array panels to power a high-capacity transponder suite, along with onboard propulsion systems — typically bipropellant chemical thrusters — for both the initial transfer from launch orbit to geostationary orbit and the ongoing north-south and east-west station-keeping maneuvers required to maintain its assigned orbital slot over the satellite's operational lifetime.

The operator, Asia Satellite Telecommunications Company, is a Hong Kong-based satellite operator with a history spanning several decades. The company's fleet is designed to provide coverage across a geographic footprint stretching from the Middle East through South and Southeast Asia to the Pacific Ocean, serving some of the world's most populous nations as well as more isolated island territories where satellite connectivity has historically been the primary or sole means of broadband access. AsiaSat operates the satellite on behalf of its owner country, recorded in the catalog as AC — the designator associated with its operational jurisdiction — reflecting the commercial and regulatory framework under which the satellite was licensed and coordinated with the International Telecommunication Union.

The spacecraft was launched on Wednesday, September 27, 2017 at 20:00 Eastern Daylight Time, which corresponds to September 28 in Coordinated Universal Time — accounting for the dual date references found in various sources. Launches of geostationary satellites typically employ heavy-lift launch vehicles capable of delivering multi-tonne payloads to geostationary transfer orbit, from which the satellite's own apogee engine performs the final circularization burn over a period of days or weeks. The precise launch vehicle used for AsiaSat 9 is not specified within the verified catalog data available to this article.

Current Status

AsiaSat 9 remains in orbit as of the current catalog record, with no decay or reentry date assigned. This is the expected status for a large, actively controlled geostationary satellite: unlike objects in low Earth orbit, which are subject to atmospheric drag and will naturally reenter over timescales of years to decades, geostationary satellites are far above the sensible atmosphere and experience negligible drag. They will remain in their orbital region indefinitely unless deliberately maneuvered.

At end of life, international guidelines and space agency recommendations call for geostationary satellites to be boosted into a slightly higher "graveyard orbit," typically a few hundred kilometers above the geostationary belt, to clear the operationally valuable GEO ring for future users. Whether AsiaSat 9 has reached that phase of its lifecycle or continues in active commercial service is not reflected in the orbital catalog entry, which records mission status as unknown. For the most current information on the satellite's operational state, users should consult AsiaSat's official communications or current commercial service listings.

The satellite's continued presence at its orbital slot contributes to the dense population of assets in the geostationary arc, a finite and internationally coordinated resource. Orbital slots at geostationary altitude are allocated by the International Telecommunication Union on a first-come, coordinated basis, and each slot represents a significant commercial and strategic asset for its holder. AsiaSat 9's position in the arc serves as a node in a broader regional communications infrastructure that underpins satellite television distribution, enterprise data networks, maritime and aeronautical connectivity, and government communications across one of the world's most dynamic economic regions.

From a tracking perspective, geostationary satellites occupy a unique position in the space surveillance picture. Because they do not move relative to the ground, they are straightforward to monitor optically but are rarely the subject of casual amateur observation in the way that low-orbit objects are. AsiaSat 9's brightness at its orbital altitude of approximately 35,790 kilometers makes it effectively invisible to the naked eye, though it is detectable with moderate amateur telescopes under dark sky conditions as a slow-moving or near-stationary point of light against the star field when observed near opposition. Its catalog entry on this platform allows operators, researchers, and satellite enthusiasts to monitor its precise orbital elements and confirm that it remains on station within the tolerance bands maintained by AsiaSat's ground control team.