Space Object Registration: UN Convention & National Requirements

A space object launched into Earth orbit or beyond is registered by its launching State (Registration Convention, Art. II), usually through national legislation. The Convention's preamble names the purposes: to assist in the identification of space objects and to contribute to the application and development of international law governing outer space; the State on whose registry an object is carried retains jurisdiction and control over it (Outer Space Treaty, Art. VIII). 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 by the launching State (Art. II) and the Register kept by the UN Secretary-General (Art. III), to which information is submitted through the UN Office for Outer Space Affairs (UNOOSA). There is no EU register of space objects in force; the EU Space Act proposal (COM(2025) 335) would add a Union register of space operators. Which registration duties apply to an operator follows from the national law of the authorising State.

Key facts:

• The UN Registration Convention (in force since 15 September 1976) requires the launching State to register space objects launched into Earth orbit or beyond (Art. II)

• The UN Secretary-General maintains the Register, with full and open access to its information (Art. III)

• Each State of registry maintains a national registry and determines its contents (Art. II(1), (3))

• The EU Space Act proposal would create the Union Register of Space Objects (URSO), set up by the Agency (EUSPA), which registers authorised Union space operators, third-country operators and international organisations (Art. 24)

• Information goes to the UN "as soon as practicable" (Art. IV(1)); national laws may set their own deadlines

• The UN data set covers the launching State(s), designator or registration number, date and territory or location of launch, basic orbital parameters and general function (Art. IV(1)); national registries may require more

• States may add information later (Art. IV(2)) and must, to the greatest extent feasible, notify objects that are no longer in Earth orbit (Art. IV(3)); General Assembly resolution 62/101 recommends reporting changes of status and of supervision

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 on 12 November 1974 (resolution 3235 (XXIX)), opened for signature on 14 January 1975 and entered into force on 15 September 1976. Its preamble recalls the Outer Space Treaty (1967), the Rescue Agreement (1968) and the Liability Convention (1972).

The preamble states what the Convention is meant to achieve:

1. National registration: provision for the national registration by launching States of space objects launched into outer space

1. Central register: a central register of objects launched into outer space, kept on a mandatory basis by the UN Secretary-General

1. Identification: additional means and procedures to assist in the identification of space objects

1. International law: a mandatory registration system that contributes to the application and development of international law governing the exploration and use of outer space

Key Provisions

Article II — National Registration

When a space object is launched into Earth orbit or beyond, the launching State registers it in an appropriate registry that it maintains, and informs the UN Secretary-General that the registry has been established (Art. II(1)). The contents of each registry and the conditions under which it is maintained are determined by the State of registry (Art. II(3)).

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. Where there are two or more, they jointly determine which one of them registers the object (Art. II(2)).

Article III — UN Register

The Secretary-General of the United Nations maintains a Register in which the information furnished under Article IV is recorded. There is full and open access to the information in the Register.

Article IV — Registration Information

Each State of registry furnishes to the Secretary-General, as soon as practicable, the following information on each space object carried on its registry (Art. IV(1)):

Data Element	Description
Launching state(s)	Name of the launching State or States
Designator or registration number	An appropriate designator of the space object or its registration number
Date and territory or location 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

The State of registry may provide additional information from time to time (Art. IV(2)). It notifies the Secretary-General, to the greatest extent feasible and as soon as practicable, of space objects on which it has reported and which are no longer in Earth orbit (Art. IV(3)).

Article VI — Assistance in identification

Where the Convention has not enabled a State Party to identify a space object that has caused damage to it or its natural or juridical persons, or that may be hazardous or deleterious, other States Parties — in particular those with space monitoring and tracking facilities — respond to the greatest extent feasible to its request for assistance, under equitable and reasonable conditions, in identifying the object.

Current Status

As at 1 January 2026, the Convention has 77 States parties and 3 further signatories (UNOOSA, A/AC.105/C.2/2026/CRP.9/Rev.1). An international intergovernmental organization that conducts space activities is treated like a State under Articles I to VII if it declares its acceptance of the rights and obligations and a majority of its member States are parties to the Convention and to the Outer Space Treaty (Art. VII(1)).

Limitations

The Registration Convention has several recognized limitations:

• No enforcement mechanism: The Convention contains no sanctions for non-compliance

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

• Limited information: Article IV(1) requires five items; anything more is voluntary (Art. IV(2))

• Qualified update duty: Objects no longer in Earth orbit are notified "to the greatest extent feasible and as soon as practicable" (Art. IV(3))

• 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 Union Register of Space Objects (URSO)

The proposal COM(2025) 335 would have the Agency set up a Union Register of Space Objects (URSO) (Art. 24(1)). Despite its name, URSO registers space services providers:

• Union space operators authorised under Art. 6(1) and notified by the competent authorities (Art. 7(7), 24(1)(a))

• Operators of Union Programme components authorised via the Commission (Art. 12(2), 24(1)(b))

• Third-country space operators with a Commission registration decision (Art. 17(1), 24(1)(c))

• International organisations registered under Art. 18(1) (Art. 24(1)(d))

The Agency publishes consolidated lists of these providers on the URSO website, and URSO has a centralised inventory and platform (Art. 24(2)-(3)).

E-certificate

After registration, the Agency issues an electronic certificate (e-certificate) to space services providers other than collision avoidance providers (Art. 25(1)). It identifies the space missions and space objects concerned and attests their conformity with the Regulation (Art. 25(2)); contracts for the provision of space-based data and space services in the Union are accompanied by it (Art. 25(3), 26).

What the Proposal Does Not Regulate

The proposal does not set registration deadlines after launch or deregistration steps for space objects, and it does not replace registration under the UN Registration Convention, which remains with the launching States and their national registries.

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

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), for the Minister (Royal Decree of 15 March 2022, Art. 2)

Scope: Objects for which Belgium is a launching State, unless another State or an international organisation registers them (Law of 17 September 2005, Art. 14 §1); for objects of non-governmental operators, the criteria of the Royal Decree of 15 March 2022, Art. 5 §2

Key features:

• Electronic register, published online and freely consultable (Royal Decree Art. 5 §1)

• Registration must be effective at launch; changes within 30 days (Law Art. 14 §2, 7°-8°)

• Data communicated to the UN Secretary-General (Law Art. 14 §2, 6°)

• National number: year + "B-SC" + register number (Royal Decree Art. 7)

• Separate public directory of authorisations (Law Art. 14 §3; Royal Decree Art. 14)

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 | Yes (online) | 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

The data elements of the UN Registration Convention (Art. IV(1)) are the minimum furnished to the United Nations; each State of registry determines what its national registry contains (Art. II(3)). Depending on national law, a registration can include:

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:

• Mass at launch and dry mass

• Physical dimensions

• Radar cross-section (if known)

• Distinguishing features or markings

Compliance information:

• Debris mitigation plan reference

• End-of-life disposal plan

• Insurance policy reference

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

• For joint launches, General Assembly resolution 62/101 recommends registering each space object separately (para. 3(c))

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 (national deadlines vary):

• Confirm successful launch and separation

• Provide actual launch date and time

• Report initial orbital elements

• Assign or confirm COSPAR international designator

After orbit stabilization:

• 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. National law may require updates, and General Assembly resolution 62/101 recommends furnishing information to the UN on changes (paras. 2(b), 4), for example:

• 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:

General Assembly resolution 62/101 asked UNOOSA to make a model registration form available (para. 5(a)). The resolution recommends uniform and additional voluntary information beyond the Convention minimum (para. 2):

• COSPAR international designator, UTC as time reference, kilometres, minutes and degrees for orbital parameters

• Web links to official information on space objects

• Change of status in operations, approximate date of decay or re-entry, and the date and physical conditions of a move to a disposal orbit

• Geostationary orbit location

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.

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 proposal (COM(2025) 335, not in force), Union spacecraft operators would have to:

• Ensure the spacecraft can be tracked and its orbital position precisely determined, and that ground systems process data in a recognised format (Art. 63, Annex III)

• Subscribe to the collision avoidance services of the Union CA space services provider in the EU SST sub-component, for all mission phases except re-entry (Art. 64(1)-(2))

• Inform it without delay of planned changes to the operation, of the decision to start the disposal and end-of-life phase (three months in advance) and of unplanned changes that affect compliance (Art. 64(3))

• Cooperate with it under Annex IV point 2 and report the actions taken after a high interest event alert (Art. 64(4)-(5))

• Send data such as positioning and spacecraft state to enable more accurate re-entry services (Art. 65(1))

URSO would register operators (Art. 24(1)).

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: EU (proposal only)

• The EU Space Act proposal has no deregistration procedure for space objects

• Under it, Union spacecraft operators would inform the Union CA space services provider three months in advance of the decision to start the disposal and end-of-life phase (Art. 64(3)(b))

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. General Assembly resolution 62/101 (2007) recommends that, following a change in supervision of a space object in orbit (para. 4):

• The State of registry, in cooperation with the appropriate State under Article VI of the Outer Space Treaty, could furnish additional information to the Secretary-General: the date of change in supervision, the new owner or operator, any change of orbital position and any change of function

• If there is no State of registry, the appropriate State under Article VI could furnish that information

The resolution notes that it is not an authoritative interpretation of or a proposed amendment to the Registration Convention.

EU Space Act Proposal

The proposal (COM(2025) 335, not in force) contains no rules on transferring a space object, its authorisation or its registration between States or operators. Only an operator of Union-owned assets would have to report to the Agency any unforeseen event that may require modifying its authorisation and any planned or imminent termination of its activity (Art. 13(1)). Transfers are governed by national space laws where they address them.

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, 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. EU Space Act proposal only: the competent authority would notify the Agency of the authorised operator for registration in URSO (Art. 7(7), 24(1)(a))

Phase 3: Launch and Early Operations

1. Confirm successful launch and provide actual launch data within any deadline set by national law

1. Receive COSPAR international designator

1. Provide confirmed orbital parameters to the national registry

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 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 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 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 proposal (COM(2025) 335, not in force) would add a Union register of authorised operators (URSO, Art. 24) but contains no rules on registering space objects. 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.