# icrs

drillable.com › aa-usno-navy-mil › easter › icrs.
As of the index built 9 Sep 2026, 22:58 UTC · [cites, never asserts](/standing).
Source: The Date of Easter, by https://aa.usno.navy.mil.
MCP https://mcp.drillable.com · [html](/e/aa-usno-navy-mil/easter/icrs.html) · [markdown](/e/aa-usno-navy-mil/easter/icrs.md) · [json](/e/aa-usno-navy-mil/easter/icrs.json) · [discovery](/.well-known/drillable.json) · [guide](/llms.txt)

## Records (3)

By drillable.com ([llm-extract/1](/standing#methods)); scored precision 1.00, recall 0.38 on the harness's last sample of 39.

- **definition** = the fundamental celestial reference system adopted by the International Astronomical Union (IAU) for high-precision positional astronomy · [quote](/r/sha256:81d98ae1dcf6148e633791577ef41911f8d46d92b6766ae24c0efd1d10dc4967?trace&start=1997&end=2137) · [sha256:dd9fa2d635d8725d…](/r/sha256:dd9fa2d635d8725de2a8c1434718db3167d295782e947f78f7b2713867f3b1dd)
- **period** = 1997 to 2006 · [quote](/r/sha256:81d98ae1dcf6148e633791577ef41911f8d46d92b6766ae24c0efd1d10dc4967?trace&start=2617&end=2741) · [sha256:570bd69e9e47c244…](/r/sha256:570bd69e9e47c2445e353209535795f78e734775296e051043361c76e9b38917)
- **right-ascension-origin-difference** = less than 0.1 arcsecond · [quote](/r/sha256:081a7a8d220a76b954bfc8e546d86d3928140fdda3e381a40c49f3fdbe74f233?trace&start=26234&end=26283) · [sha256:b74611fa92408e1e…](/r/sha256:b74611fa92408e1e6784e1c1d1cf8ccc5a04334208c6b2f83e39f5cd975e1672)

Everything here is a record by a named reader, arranged; where readers disagree, both are shown.
No reader has asserted a label for it; the title is its address.

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