Pith Number

pith:B5MK2CYI

pith:2019:B5MK2CYIJPBQDYGEAJL4IGNFR5

not attested not anchored not stored refs pending

Do the Chinese Astronomical Records Dated AD 776 January 12/13 Describe an Auroral Display or a Lunar Halo? A Critical Re-examination

Christopher J. Scott, David M. Willis, F. Richard Stephenson, Hisashi Hayakawa, Julia Wilkinson, Matthew N. Wild, Yusuke Ebihara

arxiv:1903.06806 v1 · 2019-03-15 · astro-ph.SR · physics.hist-ph

Open paper page JSON Open Graph Bundle Merged state What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{B5MK2CYIJPBQDYGEAJL4IGNFR5}

Prints a linked badge after your title and injects PDF metadata. Compiles on arXiv. Learn more

Record completeness

1 Bitcoin timestamp

2 Internet Archive

3 Author claim open · sign in to claim

4 Citations open

5 Replications open

✓ Portable graph bundle live · download bundle · merged state

The bundle contains the canonical record plus signed events. A mirror can host it anywhere and recompute the same current state with the deterministic merge algorithm.

Receipt and verification

First computed	2026-05-17T23:47:25.255346Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

0f58ad0b084bc301e0c40257c419a58f5f1983855878abf41851341e1ae650c1

Aliases

arxiv: 1903.06806 · arxiv_version: 1903.06806v1 · doi: 10.48550/arxiv.1903.06806 · pith_short_12: B5MK2CYIJPBQ · pith_short_16: B5MK2CYIJPBQDYGE · pith_short_8: B5MK2CYI

Agent API

Resolver JSON Graph JSON Events JSON Schema Signing key

Verify this Pith Number yourself

curl -sH 'Accept: application/ld+json' https://pith.science/pith/B5MK2CYIJPBQDYGEAJL4IGNFR5 \
  | jq -c '.canonical_record' \
  | python3 -c "import sys,json,hashlib; b=json.dumps(json.loads(sys.stdin.read()), sort_keys=True, separators=(',',':'), ensure_ascii=False).encode(); print(hashlib.sha256(b).hexdigest())"
# expect: 0f58ad0b084bc301e0c40257c419a58f5f1983855878abf41851341e1ae650c1

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "e2371aeb03bf9d94bac5891f4278f625f85e792c28ac3e3902fb72271c41d47d",
    "cross_cats_sorted": [
      "physics.hist-ph"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.SR",
    "submitted_at": "2019-03-15T21:11:37Z",
    "title_canon_sha256": "c72ec132afe0d107465757bd708d934e55378799898d1576006570b5dc44fc29"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1903.06806",
    "kind": "arxiv",
    "version": 1
  }
}