DEIMOS-2

DEIMOS-2, also cataloged under the international designator 2014-033D and assigned NORAD ID 40013, is a Spanish Earth observation satellite that has been operating in a low, near-circular sun-synchronous orbit since its launch in June 2014. Built by South Korean satellite manufacturer Satrec Initiative for the Spanish aerospace company Elecnor Deimos, the spacecraft represents a notable example of international collaboration in commercial remote sensing. It is also referred to as GEOSAT-2, a designation that reflects its commercial imaging role. As of current tracking data, the satellite remains in orbit, continuing to circle Earth at an altitude of roughly 590 kilometers.

Mission and Purpose

DEIMOS-2 was developed to serve as a high-resolution Earth observation platform, providing optical imagery of the planet's surface for a range of commercial and scientific applications. Remote sensing satellites of this class are typically employed in land-use monitoring, agricultural assessment, disaster response, urban planning, and environmental surveillance — though the specific contracted mission details for DEIMOS-2 are not publicly recorded in the satellite catalog.

The spacecraft was conceived and procured by Elecnor Deimos, the space division of the Spanish engineering conglomerate Elecnor. Its alternative designation, GEOSAT-2, situates it within the broader GEOSAT program, a Spanish initiative aimed at ensuring domestic access to high-resolution Earth observation data. By acquiring imagery through a commercially operated platform, Spain was able to develop an independent remote sensing capability without relying solely on government-operated systems or foreign providers.

At the time of its operation, the satellite's data was marketed and distributed under the umbrella of UrtheCast, the listed operator in the catalog, a company focused on expanding commercial access to Earth observation imagery. UrtheCast positioned itself as an aggregator and distributor of satellite data, and DEIMOS-2 fit into that commercial model as a capable imaging asset. This arrangement underscored a broader trend in the early 2010s toward the privatization and commercialization of Earth imaging, where satellite assets were increasingly owned, operated, and monetized by private firms rather than governmental space agencies.

Orbit and Tracking

DEIMOS-2 occupies a sun-synchronous orbit (SSO), a specialized class of near-polar orbit in which the satellite's orbital plane precesses at a rate that keeps it aligned with the Sun throughout the year. This geometry ensures that the satellite passes over any given point on Earth's surface at approximately the same local solar time on each revisit. For an Earth observation satellite, this consistency is invaluable: lighting conditions on the ground remain roughly constant from pass to pass, which makes it far easier to compare imagery taken on different dates and to detect changes over time.

The satellite's orbit is notably circular and compact. Current tracking data places the apogee at 592 kilometers and the perigee at 589 kilometers, a difference of only 3 kilometers, indicating an orbit that is very nearly perfectly circular. The orbital inclination is 97.6 degrees, which is slightly retrograde — a characteristic feature of sun-synchronous orbits, which require a small backward tilt relative to Earth's equatorial plane in order to achieve the necessary nodal precession rate. At this altitude and inclination, DEIMOS-2 completes one full orbit of the Earth approximately every 96.3 minutes, translating to roughly fifteen orbits per day.

For satellite trackers and observers, this orbital profile is well-suited to ground-based visibility. The satellite's relatively low altitude means it moves quickly across the sky during a pass, typically crossing from horizon to horizon in a matter of minutes. Its ground track shifts westward with each successive orbit, allowing coverage of nearly all latitudes over the course of a day. Tracking services such as this one, using two-line element (TLE) sets regularly updated from Space Surveillance Network data, can compute precise pass predictions for any location on Earth.

Design and Operator

DEIMOS-2 was designed and manufactured by Satrec Initiative, a satellite engineering company based in South Korea. Satrec Initiative was founded with significant technical lineage tracing back to the Korean Advanced Institute of Science and Technology (KAIST) and has grown into one of Asia's more prominent commercial satellite manufacturers. The company has developed a reputation for producing capable small-to-medium Earth observation satellites for international customers, and DEIMOS-2 is among the clearer demonstrations of its export manufacturing capacity.

The satellite has a mass of 310 kilograms, placing it in the category of small-to-medium satellite platforms. Spacecraft of this mass class occupy a practical middle ground in the satellite industry: they are large enough to carry capable imaging optics and onboard data-handling systems, yet small enough to be launched as a secondary or co-manifested payload alongside other spacecraft, reducing launch costs. The compact form factor also means faster development timelines and lower overall program costs compared to large, government-class Earth observation satellites.

Spain is listed as the owner country of DEIMOS-2, consistent with Elecnor Deimos's role as the primary stakeholder. Spain has maintained a steady presence in the European space sector, participating extensively in European Space Agency programs and also developing national capabilities through companies like Elecnor Deimos. The DEIMOS satellites — of which DEIMOS-2 is the second generation — represent Spain's investment in a sovereign, commercially operable imaging capability. The involvement of UrtheCast as the operational entity reflects the commercial layering common in the modern satellite industry, where manufacturing, ownership, and operations may be distributed across different organizations and countries.

Current Status and Significance

DEIMOS-2 launched on June 18, 2014, aboard a rocket that carried it into its target sun-synchronous orbit. As of the most recent catalog data available, the satellite has not undergone reentry and remains in orbit, making it a decade-old operational or semi-operational asset. Whether the satellite remains fully functional and continues to return imagery is not confirmed in the public tracking catalog, and mission status is listed as unknown.

The satellite's longevity in orbit — if it has continued to operate — would be a testament to the engineering quality of the Satrec Initiative platform. Small satellites in the 500–600 kilometer altitude range experience low but non-negligible atmospheric drag and are gradually affected by other perturbative forces, yet the nearly circular orbit profile of DEIMOS-2 suggests it has either maintained station-keeping or has experienced only minimal orbital decay to date.

From a broader perspective, DEIMOS-2 arrived during a pivotal era in commercial Earth observation. The mid-2010s saw a rapid acceleration in the number of private imaging satellites reaching orbit, as launch costs declined and sensor miniaturization advanced. DEIMOS-2, with its 310-kilogram mass and commercially marketed imagery, was part of the vanguard of that transition. Spanish and European industry stakeholders gained practical experience through its development and operation, and the collaboration with Satrec Initiative helped establish South Korea as a credible international player in satellite manufacturing for export.

The dual designation of GEOSAT-2 also ties the satellite into Spain's broader national Earth observation architecture. Programs like GEOSAT are designed to ensure that a country retains access to geospatial data even in scenarios where access to foreign or allied satellite systems might be constrained — a consideration that has only grown in strategic importance in the years since the satellite's launch.

How to Spot It

DEIMOS-2 is a relatively small spacecraft — 310 kilograms — operating at an altitude of approximately 590 kilometers. While it does not rank among the brightest satellites visible to the naked eye, it is observable under favorable conditions using binoculars or a small telescope, and may occasionally be visible to the unaided eye during passes when it catches sunlight against a dark sky.

The best viewing conditions occur during the roughly one to two hours after sunset or before sunrise, when the ground observer is in darkness but the satellite at 590 kilometers is still illuminated by sunlight. During these windows, DEIMOS-2 will appear as a steadily moving point of light, crossing the sky in approximately three to six minutes depending on the geometry of the pass. It will not blink or flash in the manner of aircraft navigation lights, and it carries no strobe — the smooth, continuous motion is the clearest identifier.

Using the orbital parameters listed on this page — an inclination of 97.6 degrees and an orbital period of 96.3 minutes — pass prediction tools can calculate precise rise and set times, maximum elevation, and compass bearing for any location on Earth. Passes with higher maximum elevations, particularly those reaching above 60 degrees, will tend to produce the brightest and most easily tracked appearances. Observers at mid-to-high northern and southern latitudes are well-placed to observe this sun-synchronous spacecraft, given its near-polar inclination.