BSAT-3C (JCSAT-110R)

BSAT-3C, also cataloged under the international designator 2011-041B and assigned NORAD ID 37776, is a geostationary communications satellite launched on August 5, 2011. Operating in a near-perfect geostationary orbit above the equator, it serves as a joint asset for two prominent Japanese broadcasting and satellite communications organizations. The satellite is also widely referenced by its alternate designation, JCSAT-110R, reflecting the dual operational roles it fulfills for its co-operators.

Mission and Purpose

The satellite was placed into service to support direct broadcasting and satellite communications services over Japan and surrounding regions. It is jointly operated by Broadcasting Satellite System Corporation, commonly known as B-SAT, and SKY Perfect JSAT Corporation, one of Japan's largest commercial satellite communications providers. B-SAT has historically focused on direct-to-home television broadcasting, supplying the transmission infrastructure that underpins a substantial portion of Japanese satellite television. SKY Perfect JSAT, for its part, operates one of Asia's most extensive commercial satellite fleets, providing services that range from broadband connectivity to maritime and enterprise communications. The JCSAT-110R designation reflects the satellite's place within JSAT's operational numbering scheme, indicating its position at the 110 degrees East orbital slot—a prime location for coverage of the Japanese archipelago and neighboring East Asian territories.

The 110 degrees East slot is among the most commercially and strategically significant geostationary positions for Japan-focused broadcasting. It sits at the heart of the orbital arc most useful for reaching Japanese households, and satellites stationed there are capable of delivering high-quality direct broadcast signals to small receiving dishes. By combining the resources of B-SAT and JSAT into a single platform, BSAT-3C represents a cooperative model in which two organizations with complementary but distinct mandates share the cost and capacity of an orbital asset. The specific payload configuration and transponder count are not recorded in publicly available catalog data, and the precise mission status at any given time is similarly not confirmed in the tracking record.

JAXA, the Japan Aerospace Exploration Agency, is listed as the operator of record in the satellite tracking catalog, though the day-to-day operational and commercial responsibilities for the payload are understood to rest with B-SAT and SKY Perfect JSAT. This distinction between the cataloging authority and the operational entity is not uncommon for Japanese space assets, where JAXA may serve in an administrative or launch-facilitation capacity even when commercial operators manage the satellite in practice.

Orbit and Tracking

BSAT-3C occupies a geostationary orbit, a class of orbit in which a satellite's orbital period matches the rotational period of the Earth, causing it to appear stationary relative to observers on the ground. This characteristic is essential for broadcasting applications, as it allows ground-based receiving antennas to be fixed in a single direction without the need for tracking mechanisms.

The satellite's current orbital parameters confirm a textbook geostationary configuration. Its apogee stands at 35,797 kilometers and its perigee at 35,793 kilometers, placing it in an almost perfectly circular orbit at the canonical geostationary altitude of roughly 35,786 kilometers above the equator. The orbital eccentricity implied by the difference between those two figures is extremely small, reflecting either a well-executed original insertion or effective station-keeping maneuvers over time. The inclination is recorded at exactly 0.0 degrees, meaning the satellite orbits directly above the equatorial plane with no measurable north-south drift—a key requirement for maintaining a fixed apparent position in the sky as seen from Japan.

The orbital period of 1,436.2 minutes corresponds closely to one sidereal day, the precise measure against which geostationary orbits are defined. This figure aligns with what would be expected for any well-maintained geostationary asset at this altitude. Together, these parameters indicate that BSAT-3C is actively station-kept, with onboard propulsion periodically correcting any perturbations introduced by gravitational influences from the Moon and Sun, as well as solar radiation pressure.

For satellite trackers and operators, the NORAD catalog ID 37776 and international designator 2011-041B are the standard references used to retrieve current two-line element sets and ephemeris data. Because the satellite is geostationary and maintains a fixed apparent position, its tracking presents little of the dynamic complexity associated with low-Earth-orbit objects. However, it remains a cataloged and monitored object within the global space surveillance network.

Design and Operators

BSAT-3C was designed and manufactured by Lockheed Martin, the American aerospace and defense conglomerate, on the A2100 satellite bus. The A2100 is a well-established geosynchronous platform that Lockheed Martin developed during the 1990s and has since applied to a wide range of commercial and government communications missions. The bus is known for its modular design, which allows it to be configured for a variety of payload capacities and mission profiles, and it has been selected by numerous operators around the world for high-reliability geostationary applications. Specific details regarding the satellite's mass are not available in the public catalog record.

The choice of the A2100 platform for a Japanese broadcasting mission reflects the international character of the commercial satellite manufacturing industry, in which Japanese operators have frequently turned to American, European, and other foreign manufacturers to build spacecraft that serve domestic audiences. Lockheed Martin's experience with high-power broadcasting satellites made it a natural candidate for a mission requiring reliable, continuous operation in a high-demand orbital slot.

B-SAT was established specifically to develop and operate Japan's direct broadcasting satellite infrastructure, and it has been central to the delivery of NHK and other major Japanese broadcasters' satellite services. SKY Perfect JSAT, formed through a series of corporate mergers involving Japan Satellite Systems and Space Communications Corporation among others, operates a diverse fleet spanning multiple orbital slots and serves a broad customer base across Asia and the Pacific. The combination of these two operators on a single satellite reflects the overlapping but distinct demands of direct-to-home broadcasting and commercial satellite services in the Japanese market.

The satellite was launched on August 5, 2011, and as of the most current catalog data it remains in orbit, continuing to occupy its geostationary position. No reentry or decay date has been recorded, which is consistent with a functioning or passivated geostationary satellite that may remain in or near its operational slot for years or decades.

Current Status and Significance

BSAT-3C holds a place in the broader history of Japanese satellite communications as one of several spacecraft that have anchored the 110 degrees East orbital slot as a cornerstone of Japanese broadcasting infrastructure. The sustained operation of geostationary assets at this position has supported the rollout of high-definition and later ultra-high-definition television broadcasting in Japan, with the orbital slot becoming synonymous with the infrastructure behind satellite TV reception in Japanese households.

The dual-operator model exemplified by BSAT-3C has implications for how orbital resources are managed in a market where spectrum and orbital slots are finite and regulated by international agreement through bodies such as the International Telecommunication Union. By coordinating a single physical satellite to serve the needs of two operators with adjacent but not identical requirements, the arrangement maximizes the return on a significant capital investment while reducing the number of objects that must be maintained in an already congested orbital neighborhood.

The satellite's ongoing presence in orbit, with no decay or end-of-life date confirmed in the public record, is consistent with the operational lifespans typical of A2100-based geostationary satellites, which are generally designed for service lives of fifteen years or more, after which they may be moved to a graveyard orbit above the geostationary belt. Whether BSAT-3C remains in active commercial service, is operating in a reduced capacity, or has been passivated awaiting eventual disposal is not reflected in the publicly available catalog information. What is clear is that it continues to be tracked as a resident space object at its geostationary location, contributing to the total count of objects maintained in humanity's catalog of Earth-orbiting hardware.

For those studying the evolution of Japanese satellite communications or the commercial use of the geostationary arc over East Asia, BSAT-3C represents a concrete example of international manufacturing partnerships, cooperative domestic operations, and the long-duration residency of commercial spacecraft in one of the most economically valuable regions of near-Earth space.