# solar coordinates algorithm

drillable.com › aa-usno-navy-mil › easter › solar coordinates algorithm.
As of the index built 10 Sep 2026, 01:10 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/solar-coordinates-algorithm.html) · [markdown](/e/aa-usno-navy-mil/easter/solar-coordinates-algorithm.md) · [json](/e/aa-usno-navy-mil/easter/solar-coordinates-algorithm.json) · [discovery](/.well-known/drillable.json) · [guide](/llms.txt)

## Records (5)

By drillable.com ([llm-extract/1](/standing#methods)); scored precision 1.00, recall 0.11 on the harness's last sample of 35.

- **based-on** = page C5 of The Astronomical Almanac · [quote](/r/sha256:54f21497d4a27b55e85f26296723d471fba23fc89607691ec11607283b4ae1f5?trace&start=4398&end=4489) · [sha256:b2abe93ce367a453…](/r/sha256:b2abe93ce367a453a44e7bebdf0cffa8e567c884baf9258a684be94d1d1ea5c6)
- **formula** = D = JD – 2451545.0 · [quote](/r/sha256:54f21497d4a27b55e85f26296723d471fba23fc89607691ec11607283b4ae1f5?trace&start=2701&end=2721) · [sha256:9a2f3707f60187c7…](/r/sha256:9a2f3707f60187c7a6bc70299a9295ad0e9608d96e78497b917a65fef059fa26)
- **requirements** = only the Julian date of the time for which the Sun's coordinates are needed · [quote](/r/sha256:03b340ad32970c9dd2f88c3cd98c0eb5721a19a9f7412b06bfba79378b0cd8ec?trace&start=2425&end=2568) · [sha256:320dee4971db8d3e…](/r/sha256:320dee4971db8d3e1670333c74fd27edb93e9726b7484273be6fb92c2d670388)
- **window-of-applicability** = four-century window · [quote](/r/sha256:54f21497d4a27b55e85f26296723d471fba23fc89607691ec11607283b4ae1f5?trace&start=2146&end=2186) · [sha256:6fa21fc4a54a1c3b…](/r/sha256:6fa21fc4a54a1c3b0112682e5accf5419bee4c97e746dba88301a021b2073573)
- **based-on** = page C5 of The Astronomical Almanac [superseded] · [quote](/r/sha256:03b340ad32970c9dd2f88c3cd98c0eb5721a19a9f7412b06bfba79378b0cd8ec?trace&start=4360&end=4556) · [sha256:39915019017c9ce4…](/r/sha256:39915019017c9ce414fa386471f29f09cda2f4a9934be0568d6dabeabbe7ff1a)

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No reader has asserted a label for it; the title is its address.

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