Pith Number

pith:QYHH5RRI

pith:2012:QYHH5RRI64ZYTVKV2E363ZNLN7

not attested not anchored not stored refs pending

Measuring the position of the center of the Sun at the Clementine Gnomon of Santa Maria degli Angeli in Rome

Costantino Sigismondi

arxiv:1201.0510 v1 · 2012-01-02 · astro-ph.IM · astro-ph.SR

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{QYHH5RRI64ZYTVKV2E363ZNLN7}

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

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	2026-05-18T03:39:28.892715Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

860e7ec628f73389d555d137ede5ab6fe03a2b303de1d1ad2d8e2ee059987af6

Aliases

arxiv: 1201.0510 · arxiv_version: 1201.0510v1 · doi: 10.48550/arxiv.1201.0510 · pith_short_12: QYHH5RRI64ZY · pith_short_16: QYHH5RRI64ZYTVKV · pith_short_8: QYHH5RRI

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/QYHH5RRI64ZYTVKV2E363ZNLN7 \
  | 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: 860e7ec628f73389d555d137ede5ab6fe03a2b303de1d1ad2d8e2ee059987af6

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "148ac760f84c42a39a7083dc6b6915f7d2e3f65f35aa99446444492f8850d167",
    "cross_cats_sorted": [
      "astro-ph.SR"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.IM",
    "submitted_at": "2012-01-02T18:39:42Z",
    "title_canon_sha256": "ef314e50765f8feecfe57cd59d3c8c7dfe764c4c97c2a58a7cb97952fb31d5c0"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1201.0510",
    "kind": "arxiv",
    "version": 1
  }
}