IAU 2000 resolutions

E499558

International Astronomical Union resolution astronomical standard set of resolutions

The IAU 2000 resolutions are a set of internationally adopted astronomical standards that updated fundamental time scales, reference systems, and models used in celestial mechanics and astrometry.

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All labels observed (7)

Label	Occurrences
IAU 2000 resolutions canonical	4
IAU 1991 resolutions on reference systems	1
IAU 2000 Resolution B1.3	1
IAU 2000 Resolution B1.5	1
IAU 2000 resolutions on reference systems	1
IAU resolutions	1
International Astronomical Union resolutions on reference systems	1

How this entity was disambiguated

This entity first appeared as the object of triple T5150743 — resolving that mention is where its identity was fixed. The disambiguator weighed these candidate entities and picked the highlighted one (or “None”, minting a new entity). This is how homonymy is resolved: the same surface form can point to different entities.

NED1 Entity disambiguation (via context triple) gpt-5-mini-2025-08-07

Target entity: IAU 2000 resolutions
Context triple: [Terrestrial Time, refinedIn, IAU 2000 resolutions]

A. IAU 1991 Resolution A4
IAU 1991 Resolution A4 is an International Astronomical Union standard that formalized modern relativistic time scales and reference systems used in astronomy and geodesy.
B. General Assembly of the IAU
The General Assembly of the IAU is the International Astronomical Union’s principal global meeting, where astronomers convene to discuss scientific results, set standards, and make key organizational and nomenclature decisions.
C. IAU Working Groups
IAU Working Groups are specialized expert committees within the International Astronomical Union that focus on specific scientific, technical, or organizational topics in astronomy and astrophysics.
D. International Celestial Reference System
The International Celestial Reference System is the standard, high-precision coordinate framework used in astronomy and geodesy to define positions of celestial objects relative to distant quasars.
E. International Astronomical Union
The International Astronomical Union is the global organization of professional astronomers responsible for standardizing astronomical nomenclature and definitions, including constellations and celestial bodies.
F. None of above. chosen
G. Unsure - the case is ambiguous/there is not enough information to decide.

NED2 Entity disambiguation (via description) gpt-5-mini-2025-08-07

Target entity: IAU 2000 resolutions
Target entity description: The IAU 2000 resolutions are a set of internationally adopted astronomical standards that updated fundamental time scales, reference systems, and models used in celestial mechanics and astrometry.

A. IAU 1991 Resolution A4
IAU 1991 Resolution A4 is an International Astronomical Union standard that formalized modern relativistic time scales and reference systems used in astronomy and geodesy.
B. General Assembly of the IAU
The General Assembly of the IAU is the International Astronomical Union’s principal global meeting, where astronomers convene to discuss scientific results, set standards, and make key organizational and nomenclature decisions.
C. IAU Working Groups
IAU Working Groups are specialized expert committees within the International Astronomical Union that focus on specific scientific, technical, or organizational topics in astronomy and astrophysics.
D. International Celestial Reference System
The International Celestial Reference System is the standard, high-precision coordinate framework used in astronomy and geodesy to define positions of celestial objects relative to distant quasars.
E. International Astronomical Union
The International Astronomical Union is the global organization of professional astronomers responsible for standardizing astronomical nomenclature and definitions, including constellations and celestial bodies.
F. None of above. chosen

Statements (43)

Predicate	Object
instanceOf	International Astronomical Union resolution ⓘ astronomical standard ⓘ set of resolutions ⓘ
adoptedAt	24th General Assembly of the International Astronomical Union ⓘ linked to: General Assembly of the IAU
adoptedBy	International Astronomical Union ⓘ
adoptionCity	Manchester ⓘ
adoptionCountry	United Kingdom ⓘ
adoptionYear	2000 ⓘ
basisFor	later refinements of precession-nutation models ⓘ subsequent IAU resolutions on reference systems ⓘ
concerns	Terrestrial Time ⓘ barycentric coordinate time ⓘ geocentric coordinate time ⓘ time transformations in relativity ⓘ
defines	International Celestial Reference Frame ⓘ linked to: International Celestial Reference System International Celestial Reference System ⓘ
field	astrometry ⓘ astronomy ⓘ celestial mechanics ⓘ timekeeping ⓘ
includes	IAU 2000A precession-nutation model ⓘ
language	English ⓘ
replaces	earlier IAU standards on reference systems ⓘ earlier IAU standards on time scales ⓘ
scope	celestial reference frames ⓘ relativistic modeling in astronomy ⓘ solar system dynamics ⓘ
standardizes	Earth rotation modeling ⓘ barycentric celestial reference system ⓘ geocentric celestial reference system ⓘ precession-nutation of the Earth ⓘ relativistic reference systems in the solar system ⓘ
updates	fundamental astronomical reference systems ⓘ fundamental astronomical time scales ⓘ models used in astrometry ⓘ models used in celestial mechanics ⓘ
usedBy	International Earth Rotation and Reference Systems Service ⓘ astrometric catalog compilers ⓘ space navigation agencies ⓘ
usedFor	Earth orientation parameter determination ⓘ high-precision positional astronomy ⓘ satellite orbit determination ⓘ spacecraft navigation ⓘ

How these facts were elicited

Referenced by (10)

Full triples — surface form annotated when it differs from this entity's canonical label.

Terrestrial Time → refinedIn → IAU 2000 resolutions ⓘ

Terrestrial Time → standardizedIn → IAU 2000 resolutions ⓘ

subject linked to: TT

IERS ICRS Centre → operatesWithinFrameworkOf → International Astronomical Union resolutions on reference systems ⓘ