Pith Number

pith:WY5ZHU7R

pith:2012:WY5ZHU7RL2NPM7PK3C7B55NVFZ

not attested not anchored not stored refs pending

The Cepheid distance to the Local Group Galaxy NGC 6822

J. W. Menzies, M. W. Feast, N. Matsunaga, P. A. Whitelock

arxiv:1201.1987 v1 · 2012-01-10 · astro-ph.GA · 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{WY5ZHU7RL2NPM7PK3C7B55NVFZ}

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	2026-05-18T01:58:53.565101Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

b63b93d3f15e9af67dead8be1ef5b52e7f69a46467d07aa5fe24af0609bd4dc2

Aliases

arxiv: 1201.1987 · arxiv_version: 1201.1987v1 · doi: 10.48550/arxiv.1201.1987 · pith_short_12: WY5ZHU7RL2NP · pith_short_16: WY5ZHU7RL2NPM7PK · pith_short_8: WY5ZHU7R

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/WY5ZHU7RL2NPM7PK3C7B55NVFZ \
  | 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: b63b93d3f15e9af67dead8be1ef5b52e7f69a46467d07aa5fe24af0609bd4dc2

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "4312eb1c8699837b553c719c51a7b40b3f758a749415e4cf9cd7dba2962540e8",
    "cross_cats_sorted": [
      "astro-ph.SR"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2012-01-10T08:49:25Z",
    "title_canon_sha256": "aa1a67b497357ff615e958853ae666f1bae4f8aa0f54065af0ed0d2a697b8aae"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1201.1987",
    "kind": "arxiv",
    "version": 1
  }
}