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OAR-0000001 ACTIVE PAYLOAD

ISS (ZARYA)

launched 1998-11-20 from TYMSC · LEO regime · owner code ISS
JSON
Identity
OAR Asset IDOAR-0000001
Object nameISS (ZARYA)
NORAD catalogue no.25544
COSPAR / Int'l designator1998-067A
Object typePAYLOAD
Owner codeISS
StatusACTIVE
Disposal—
Decay watch—
Owner / launching orgInternational Space Station (International) intergovernmental
OrbitLEO · e=0.0004991
Apogee (alt)
422.9 km
Perigee (alt)
416.1 km
Period
92.96 min
Semi-major axis
6797.6 km
Inclination
51.6301°
Eccentricity
0.0004991
Mean motion
15.4906563 rev/day
Epoch
2026-09-10T03:26:38.577120
Source
GP
Launch
Launch date1998-11-20
Launch siteTYMSC
Decay date—
Operator attribution (GCAT)
Operator (GCAT)NASA Johnson Space Flight Center civil government
Houston:Clear Lake, Texas (US)
ManufacturerGKNPTs im. M.V. Khrunichev, Roskosmos (RU)
GCAT identifiersS25544 · 1998-067A (PPTH-MU)
Name in GCATZarya (catalogue name differs)
Reconciliationmatched by satcat_number · confirmed
Attribution from GCAT (J. McDowell), ingested under CC-BY-4.0 and shown alongside — not in place of — the catalogue owner above. GCAT reflects one researcher's editorial synthesis of public sources; treat it as evidence of the operator, not as a determination. McDowell, J., General Catalog of Artificial Space Objects (GCAT), planet4589.org/space/gcat, CC-BY-4.0
UN registration
UN registrationREGISTERED by US
Registration documentST/SG/SER.E/614
Registration metadata as reproduced in GCAT from the UN Register (ST/SG/SER.E and A/AC.105/INF series). Registration is a self-assertion by the state of registry; under Registration Convention Art. II a state of registry must be a launching state.
Succession of responsibility
Organisation phaseFromToState
NASA Manned Spacecraft Center MSC 1962-03-01 1973-02-17 US
NASA Johnson Space Flight Center JSC CURRENT ← at this object's attribution 1973-02-17 — US
Phases of the same organisation (GCAT UCode JSC) through renames, acquisitions and restructurings. Continuity of the operating entity does not by itself transfer liability, which under Liability Convention Art. II–III attaches to the launching state.
Launching State attributionJOINT & SEVERAL
A State qualifies if it launches, procures the launch, or the launch occurs from its territory or facility. Status is fixed at launch and does not transfer with the operator.
LimbStateTierBasis
State of registry US T1 OFFICIAL Registered with the UN by US in ST/SG/SER.E/614
Registration Convention Art. II — a State of registry must be a launching State
Procurement US T4 INFERRED Inferred from owner nationality: NASA Johnson Space Flight Center (US)
Outer Space Treaty Art. VII, Liability Convention Art. I(c) and Registration Convention Art. I(a) — State which procures the launching (INFERRED, not established)
A State qualifies if it launches, procures the launching, or the launch is from its territory or facility — more than one State can qualify for one object, and launching States are jointly and severally liable (Liability Convention Art. V). Launching-State status is fixed at launch and does not transfer when operators change. Tier 4 claims are inferred from owner nationality and are the weakest: rideshare procurement through integrators is genuinely contestable.
Aliases
Every identifier that resolves to this OAR ID.
COSPAR1998-067A
NAMEISS (ZARYA)
NORAD25544
Record history
Logged events for this record — from the ingest log and reported lifecycle events, not a reconstruction.
2026-09-10T03:26:38.577120
Element set refreshed from CelesTrak GP
2026-09-10T09:57:44.657Z
Record last updated by ingest
2026-07-02T07:12:17.706Z
Object catalogued · OAR ID issued