Space Object Registration: UN Convention & National Requirements

Every object launched into outer space must be registered. This obligation, rooted in international treaty law and reinforced by national legislation and the EU Space Act, serves fundamental purposes: identifying who is responsible for a space object, establishing which state bears international liability, and maintaining awareness of what is in orbit. Despite its importance, registration is often treated as an afterthought by operators focused on technical and commercial challenges. This guide provides a thorough treatment of registration obligations, procedures, and best practices.

Executive Summary

Space object registration operates on two levels: national registration (maintained by each launching state) and international registration (maintained by the United Nations Office for Outer Space Affairs, UNOOSA). The EU Space Act adds a European dimension through the EU Space Registry. Operators must comply with all applicable registration requirements as a condition of authorization.

Key facts:

• The UN Registration Convention (1976) requires launching states to register space objects

• UNOOSA maintains the international Register of Objects Launched into Outer Space

• National registries are maintained by each state that conducts or authorizes space activities

• The EU Space Act establishes an EU Space Registry coordinated by EUSPA

• Registration must occur promptly after launch (specific timelines vary by jurisdiction)

• Registration information includes orbital parameters, ownership, function, and state of registry

• Changes to registered information (orbit, ownership, status) must be updated

• Deregistration is required at end of life after successful disposal

• Failure to register can affect authorization status and international liability allocation

Part 1: The UN Registration Convention (1976)

Historical Context

The Convention on Registration of Objects Launched into Outer Space was adopted by the UN General Assembly in 1975 and entered into force in 1976. It builds on the earlier Outer Space Treaty (1967) and Liability Convention (1972) by establishing a mechanism for identifying space objects and their responsible states.

The Registration Convention was motivated by several concerns:

1. Identification: As the number of objects in orbit grew, the ability to identify who owned and controlled each object became essential for safety and liability purposes

1. Liability implementation: The Liability Convention establishes state liability for damage caused by space objects, but it requires being able to identify the "launching state" — registration serves this function

1. Transparency: Registration provides the international community with information about what is being placed in orbit and by whom

1. Conflict resolution: Registration helps resolve questions about jurisdiction and control over space objects

Key Provisions

Article II — National Registration

Each launching state must maintain a national registry of space objects. The registry must be established at the state's discretion but must contain the information specified in Article IV.

A "launching state" is defined as:

• A state that launches or procures the launching of a space object

• A state from whose territory or facility a space object is launched

This means that a single space object may have multiple launching states. In practice, the states agree among themselves which one will register the object.

Article III — UN Registration

The launching state that registers the object must also furnish information to the Secretary-General of the United Nations for inclusion in the international register. This must be done "as soon as practicable" after launch.

Article IV — Registration Information

The following information must be provided for each registered space object:

Data Element	Description
Launching state(s)	Name of the state(s) responsible
Designator or registration number	National registry identifier
Date and territory/facility of launch	When and from where the object was launched
Basic orbital parameters	Nodal period, inclination, apogee, perigee
General function	Purpose of the space object

Article VI — Updates

States should notify the Secretary-General of any space objects that have returned to Earth, been deorbited, or otherwise changed status. This is the basis for deregistration.

Current Status

As of 2025:

• 72 states and international organizations have ratified or acceded to the Convention

• Most major space-faring nations are parties

• UNOOSA registers approximately 2,000-3,000 new objects per year

• The register contains over 15,000 entries for objects launched since 1957

• Compliance with notification timelines remains uneven

Limitations

The Registration Convention has several recognized limitations:

• No enforcement mechanism: Non-compliance carries no direct penalty

• Vague timelines: "As soon as practicable" is not a defined deadline

• Limited information: The required data elements are minimal by modern standards

• No updates mandate: Article VI uses "should" rather than "shall" for status updates

• Single registrar model: Only one state registers each object, which can be ambiguous for multi-state ventures

• No transfer provisions: The Convention does not explicitly address transfer of registration between states

Part 2: EU Space Act Registration Requirements

The EU Space Registry

The EU Space Act establishes an EU Space Registry, coordinated by EUSPA. This is a significant development because it creates a unified European registration framework that goes beyond the minimal requirements of the UN Convention.

Key features of the EU Space Registry:

• Centralized database: Single EU-wide registry accessible to all NCAs

• Enhanced information: More detailed data than the UN Convention requires

• Real-time updates: Designed for more timely information than the traditional UN process

• Integration with authorization: Registration is linked to the authorization process

• Interoperability: Designed to feed information to the UN Register and national registries

What Must Be Registered

Under the EU Space Act, the following must be registered:

Space objects:

• Spacecraft (operational and non-operational)

• Launch vehicle upper stages remaining in orbit

• Mission-related objects deliberately released

• Debris generated by EU-authorized operations (to the extent trackable)

Associated information:

• All UN Convention data elements

• Additional technical parameters (mass, dimensions, cross-section)

• Operator identification and authorization reference

• Cybersecurity classification status

• Insurance details

• Debris mitigation plan reference

• End-of-life plan status

Registration Timeline Under the EU Space Act

Event	Registration Action | Deadline
Authorization granted	Pre-registration of planned objects

At authorization | | Launch | Update with actual launch data | Within 7 days | | Orbit achieved | Confirm orbital parameters | Within 30 days | | Operational changes | Update registration data | Within 30 days of change | | End of life | Update status to decommissioned | Within 30 days | | Disposal complete | Request deregistration | Within 90 days |

Relationship with National Registries

The EU Space Registry supplements rather than replaces national registries. Member states continue to maintain their own national registries as required by the UN Convention. The EU Registry:

• Receives data from national registries

• Provides a consolidated European view

• Feeds information to UNOOSA for the international register

• Supports EUSST (EU Space Surveillance and Tracking) operations

Part 3: National Registries Across 10 Jurisdictions

Overview

Each European state with a national space law maintains a registry of space objects launched under its jurisdiction. The detail and sophistication of these registries varies significantly.

France

Registry maintained by: CNES (on behalf of the Ministry)

Scope: All objects launched from French territory (including Kourou) or by French operators

Key features:

• Most comprehensive European national registry

• Integrated with CNES technical databases

• Includes detailed technical and orbital data

• Publicly accessible (partial information)

• Updated regularly through CNES operations

Registration requirements:

• Pre-launch notification with planned orbital parameters

• Post-launch confirmation within 30 days

• Ongoing updates for orbit changes, anomalies, or status changes

• End-of-life notification and deregistration request

United Kingdom

Registry maintained by: UK Space Agency

Scope: Objects licensed under the Outer Space Act 1986 or Space Industry Act 2018

Key features:

• Publicly available register

• Linked to UK licensing process

• Updated following launch and status changes

• Includes historical UK-registered objects

Registration requirements:

• Registration as condition of license

• Post-launch data submission

• Status updates for significant changes

• Deregistration upon verified disposal

Germany

Registry maintained by: Federal Ministry for Economic Affairs

Scope: German-licensed space objects

Key features:

• Focused on operational data

• Integrated with SatDSiG licensing for EO satellites

• Less publicly detailed than France or UK

• Being modernized under EU Space Act preparation

Luxembourg

Registry maintained by: Ministry of the Economy

Scope: Objects authorized under Luxembourg Space Law (2020)

Key features:

• Relatively new registry

• Streamlined data requirements

• English-language submissions accepted

• Growing as Luxembourg's space sector expands

Netherlands

Registry maintained by: Ministry of Economic Affairs

Scope: Objects authorized under the Space Activities Act (2007)

Key features:

• Well-established registry

• Linked to authorization process

• Regular UNOOSA notifications

• Public access to basic information

Belgium

Registry maintained by: Federal Science Policy Office (BELSPO)

Scope: Belgian-authorized space objects

Key features:

• Established under the 2005 Space Law

• Comprehensive for a smaller registry

• Regular UNOOSA submissions

• Integrated with authorization tracking

Austria

Registry maintained by: Federal Ministry (BMK)

Scope: Austrian-authorized space objects

Key features:

• Established under the 2011 Space Law

• Clear registration requirements

• Timely UNOOSA notifications

• German-language primary documentation

Denmark

Registry maintained by: Danish Ministry of Higher Education and Science

Scope: Danish-authorized space objects

Key features:

• Established under 2016 Space Act

• Efficient administration

• English-language capability

• Growing with Danish space industry

Italy

Registry maintained by: ASI (Italian Space Agency)

Scope: Italian-authorized space objects

Key features:

• Substantial registry reflecting Italy's space heritage

• Integrated with ASI technical databases

• Regular UNOOSA submissions

• Italian-language primary process

Norway

Registry maintained by: Norwegian Space Agency

Scope: Norwegian-authorized space objects

Key features:

• Covers Andoya and Svalbard launches

• Practical, efficient process

• English widely accepted

• Growing with Andoya Spaceport development

Comparative Summary

Country	Registry Maturity | Public Access | Language | UNOOSA Notification Timeliness
France	High

Partial | French | Good | | UK | High | Yes | English | Good | | Germany | Medium | Limited | German | Moderate | | Luxembourg | Developing | Limited | EN/FR | Good | | Netherlands | High | Partial | Dutch/EN | Good | | Belgium | Medium | Limited | FR/NL | Good | | Austria | Medium | Limited | German | Good | | Denmark | Medium | Limited | Danish/EN | Good | | Italy | High | Limited | Italian | Moderate | | Norway | Medium | Limited | Norwegian/EN | Good |

Part 4: What Must Be Registered

Mandatory Registration Data

At minimum, registration must include the data elements specified in the UN Registration Convention (Article IV), supplemented by any additional requirements of the applicable national law and the EU Space Act:

Identity and ownership:

• Name and designation of the space object

• International designator (COSPAR ID, assigned post-launch)

• Owner/operator name and contact information

• Authorizing state and authorization reference number

• Manufacturer (if different from operator)

Launch information:

• Date and time of launch (UTC)

• Launch vehicle and configuration

• Launch site (name and country)

• Co-passengers on the launch (if shared ride)

Orbital parameters:

• Nodal period (minutes)

• Inclination (degrees)

• Apogee altitude (km)

• Perigee altitude (km)

• For GEO: assigned orbital longitude

Mission information:

• General function/purpose of the space object

• Planned operational lifetime

• Frequency bands used (cross-reference to ITU filings)

• Payload description (general)

Physical characteristics (EU Space Act enhanced):

• Mass at launch and dry mass

• Physical dimensions

• Radar cross-section (if known)

• Distinguishing features or markings

Compliance information (EU Space Act enhanced):

• Debris mitigation plan reference

• End-of-life disposal plan

• Insurance policy reference

• NIS2 classification (if applicable)

Constellation Registration

For satellite constellations, registration presents specific challenges:

• Each satellite must be individually registered

• Common orbital parameters may be used for identical satellites in the same orbital plane

• Updates are required as satellites are deployed, repositioned, or decommissioned

• Batch registration processes may be available for large constellations

• The EU Space Act anticipates constellation-level registration with individual satellite identifiers

Part 5: Registration Timeline

Pre-Launch Registration

Registration activities begin well before launch:

At authorization:

• Pre-register the planned space object(s) in the national registry

• Provide preliminary orbital parameters based on mission design

• Assign national registration number(s)

Pre-launch (T-6 to T-1 months):

• Update registration with final launch details (date, vehicle, site)

• Confirm orbital parameters based on latest mission analysis

• Provide co-passenger information for shared launches

• Coordinate with launch state if different from registering state

Post-Launch Registration

After launch, registration must be updated with actual data:

Immediately post-launch (within 7 days):

• Confirm successful launch and separation

• Provide actual launch date and time

• Report initial orbital elements

• Assign or confirm COSPAR international designator

After orbit stabilization (within 30 days):

• Provide operational orbital parameters

• Confirm satellite health and functionality

• Update any parameters that differ from pre-launch registration

• Initiate UNOOSA notification process

Ongoing Registration Updates

Registration is not a one-time event. Updates are required for:

• Orbit changes: Station-keeping maneuvers that change mean orbital elements, orbit-raising or lowering, plane changes

• Ownership changes: Transfer of the space object to a new operator or state

• Status changes: Transition from operational to non-operational, safe mode, or disposal phase

• Physical changes: If the object separates into parts (intentional or unintentional)

Post-Mission Registration

At end of life:

Disposal phase:

• Notify registry of end-of-life operations commencing

• Update orbital parameters during disposal maneuvers

• Report final orbital state after disposal complete

Deregistration:

• For objects that re-enter: Report re-entry date and location (if known)

• For objects in graveyard orbit: Update status to "passivated/disposed"

• Request deregistration from national registry

• UNOOSA notification of change in status

Part 6: UNOOSA Registry and Notification Process

How UNOOSA Registration Works

The United Nations Office for Outer Space Affairs maintains the Register of Objects Launched into Outer Space under General Assembly Resolution 1721B (XVI) and the Registration Convention.

Submission process:

1. The registering state prepares a notification using the standard UNOOSA format

1. The notification is transmitted to the Secretary-General (via UNOOSA)

1. UNOOSA reviews the notification for completeness

1. The information is recorded in the UN Register

1. The registration is published in the UNOOSA online index

Standard notification format:

Notifications follow the format established by General Assembly Resolution 62/101, which recommends additional voluntary information beyond the Convention minimum:

• Enhanced orbital parameters

• Web links to operator information

• Change of status notifications

• Geostationary position information

UNOOSA Online Index

UNOOSA maintains a publicly accessible Online Index of Objects Launched into Outer Space at:

• Database searchable by launching state, date, designator, or object name

• Contains registration data for all notified objects since 1957

• Updated as new notifications are received

• Accessible to anyone without registration or fee

Practical Considerations

Timeliness: Many states are slow to notify UNOOSA. The "as soon as practicable" standard in the Convention means that some notifications arrive months or even years after launch. The EU Space Act aims to improve this for European operators by setting specific deadlines.

Completeness: Not all launched objects are registered. While major space-faring nations have generally good compliance, gaps exist particularly for:

• Objects launched by states that are not parties to the Convention

• Secondary payloads and rideshare objects where registration responsibility is unclear

• Debris from launch vehicles or separation events

Updates: Status updates (end of life, re-entry, disposal) are often not submitted, leading to an accumulation of entries for objects that no longer exist. UNOOSA has encouraged states to improve notification practices.

Part 7: Space Surveillance and Tracking (SST) Data Sharing

The EU SST Partnership

The EU Space Surveillance and Tracking (EU SST) partnership provides independent European capability for tracking space objects. Registration and SST are complementary:

• Registration tells you what should be in orbit (ownership, purpose, planned parameters)

• SST tells you what actually is in orbit (observed position, trajectory, status)

Operator Obligations for SST

Under the EU Space Act, authorized operators must:

Provide data to EUSST:

• Pre-launch orbital predictions

• Operational ephemeris data (planned and actual positions)

• Maneuver plans and execution data

• Anomaly information

• End-of-life disposal data

Respond to EUSST services:

• Conjunction warnings: Assess and respond to collision risk

• Re-entry predictions: Provide information for objects under their control

• Fragmentation alerts: Cooperate in identifying debris sources

SST and Registration Integration

The EU Space Act envisions close integration between the EU Space Registry and EUSST:

• Registered objects are cross-referenced with tracked objects

• Discrepancies (unregistered objects, untracked registered objects) trigger investigation

• Operational data from operators enriches SST products

• SST observations validate registration information

International SST Cooperation

European SST data sharing extends beyond the EU:

• US Space Surveillance Network: Data sharing agreements for conjunction assessment

• 18th Space Defense Squadron: Provides publicly available Two-Line Element sets

• Combined Space Operations (CSpO): Multinational SST cooperation

• International cooperation: Bilateral agreements with non-EU space-faring nations

Part 8: Deregistration at End of Life

When Deregistration Occurs

Deregistration is the formal removal of a space object from the national and international registries. It typically occurs when:

1. Controlled re-entry: The object has been intentionally de-orbited and has re-entered the atmosphere

1. Natural re-entry: The object has naturally decayed and re-entered

1. Transfer of registration: Ownership and registration responsibility transfer to another state

1. Object no longer in space: The object has been captured, serviced, or otherwise removed from orbit

Deregistration Process

Step 1: Confirm end-of-life status

• Verify that the space object has completed its mission

• Confirm disposal operations are complete (deorbit, graveyard orbit, passivation)

• Obtain SST confirmation that the object is no longer in its operational orbit (for re-entry) or has reached its disposal orbit

Step 2: Notify national registry

• Submit deregistration request to the national registry authority

• Provide evidence of disposal (telemetry, tracking data, operator confirmation)

• Include final orbital state and disposal date

Step 3: Notify UNOOSA

• The registering state submits a status change notification to UNOOSA

• Notification includes the date of re-entry or disposal and final status

• UNOOSA updates the international register

Step 4: Update EU Space Registry

• Under the EU Space Act, update the EU Space Registry with disposal status

• NCA confirms deregistration in coordination with EUSPA

Challenges in Deregistration

Objects in graveyard orbits: GEO satellites moved to graveyard orbits are not "removed" from space but are no longer operational. They may be marked as "disposed/passivated" rather than fully deregistered.

Uncontrolled re-entries: When an object re-enters without precise control, the exact time and location of re-entry may be uncertain. EUSST and other SST providers can help determine the re-entry window.

Legacy objects: Many historical space objects were never properly registered or have incomplete records. Identifying and updating these records is an ongoing challenge.

Debris from registered objects: If a registered object generates debris (through collision or breakup), the fragments may need to be registered separately or noted in the parent object's record.

Part 9: Transfer of Registration Between States

Why Transfers Occur

Space objects are increasingly traded as commercial assets. A satellite may be:

• Sold to an operator in a different state

• Transferred as part of a corporate acquisition

• Reassigned within a multinational corporate group

• Leased to an operator under a different jurisdiction

Legal Framework for Transfer

The UN Registration Convention does not explicitly address transfer of registration. However, General Assembly Resolution 62/101 (2007) recommends practices for transfer scenarios:

• The original registering state and the new state of registry should agree on the transfer

• Both states should notify the Secretary-General

• The new state should provide updated registration information

• The original state should note the transfer in its registry

EU Space Act Transfer Provisions

The EU Space Act provides a more structured approach to transfer within the EU:

Between EU member states:

• Transfer of authorization must be approved by both the original and new NCAs

• Registration transfers automatically with the authorization

• The EU Space Registry is updated to reflect the new registering state

• UNOOSA is notified by the new registering state

From EU to non-EU state:

• The operator must comply with end-of-authorization obligations

• The NCA must be satisfied that the new state will assume registration and supervision

• Export control considerations may apply

• The EU Space Registry entry is updated to reflect the transfer

From non-EU state to EU:

• The new EU operator must obtain authorization from their NCA

• Registration in the national registry and EU Space Registry follows authorization

• Previous registration history should be documented

Practical Considerations for Transfer

Operators involved in transfers should:

1. Engage both the original and new NCAs early in the process

1. Ensure continuity of insurance coverage during the transfer

1. Address spectrum and frequency coordination transfer

1. Update all relevant registries (national, EU, UNOOSA, ITU)

1. Coordinate with SST providers to maintain tracking continuity

1. Document the transfer comprehensively for liability purposes

Part 10: Step-by-Step Registration Process

For a New Mission

Here is a practical step-by-step guide for registering a new space object:

Phase 1: Pre-Authorization

1. Identify the registering state (based on launching state criteria and operator nationality)

1. Confirm the registering state is party to the Registration Convention

1. Review national registration requirements of the registering state

1. Include registration plan in authorization application

Phase 2: Authorization to Launch

1. Receive authorization from NCA (registration pre-conditions should be met)

1. Pre-register the planned space object in the national registry

1. Obtain national registration number/designator

1. Pre-register in the EU Space Registry (if EU operator)

Phase 3: Launch and Early Operations

1. Confirm successful launch and provide actual launch data within 7 days

1. Receive COSPAR international designator

1. Provide confirmed orbital parameters within 30 days

1. Update national registry with operational data

Phase 4: International Registration

1. National administration prepares UNOOSA notification

1. Notification submitted to the Secretary-General

1. UNOOSA records the information in the international register

1. Verify the entry appears in the UNOOSA Online Index

Phase 5: Operational Maintenance

1. Update registration for any significant orbital changes

1. Notify registry of status changes (operational issues, safe mode, etc.)

1. Update for ownership or operator changes

1. Maintain consistency between national, EU, and UNOOSA records

Phase 6: End of Life

1. Notify registry of end-of-life operations commencing

1. Update with disposal status upon completion

1. Submit deregistration request (for re-entered objects) or status update (graveyard orbit)

1. Confirm UNOOSA notification of status change

1. Archive all registration documentation

Required Documents Checklist

• [ ] Authorization application (includes registration plan)

• [ ] Pre-registration form for national registry

• [ ] Launch notification with orbital parameters

• [ ] Post-launch confirmation with actual data

• [ ] COSPAR designator assignment confirmation

• [ ] UNOOSA notification form

• [ ] Status change notifications (as needed)

• [ ] Transfer documentation (if applicable)

• [ ] End-of-life disposal confirmation

• [ ] Deregistration request

How Caelex Helps

Caelex streamlines the registration process as part of your overall compliance management:

• Registration Tracking: Monitor the status of registration across national, EU, and UN registries for all your space objects in a unified dashboard

• Deadline Reminders: Automated alerts for post-launch registration deadlines, update requirements, and UNOOSA notification timelines

• Document Generation: Pre-populate registration forms and notification templates with data from your authorization application

• Multi-Object Management: Track registration for entire constellations with batch update capabilities

• Compliance Integration: Link registration status to authorization conditions, ensuring registration gaps do not affect your authorization

• Transfer Support: Guided workflows for transferring registration between states during asset sales or corporate restructuring

Start your compliance assessment to see how registration fits into your overall regulatory obligations.

Conclusion

Space object registration is a foundational obligation that connects international treaty law, European regulation, and national licensing requirements. While it may seem like administrative paperwork compared to the technical excitement of building and launching satellites, proper registration is essential for establishing legal responsibility, enabling space surveillance, and maintaining the international order that allows space activities to proceed peacefully. The EU Space Act raises the bar for European operators by requiring more detailed and timely registration, integrated with the authorization and supervision framework. Operators who build registration into their compliance processes from the outset will find it straightforward and painless. Those who treat it as an afterthought risk gaps that can complicate authorization, insurance, and international liability. Register early, register completely, and keep your registrations current.