Pith Number

pith:7SZQ2PWT

pith:2002:7SZQ2PWTXDEFIXCU6NO7VTAGMU

not attested not anchored not stored refs pending

The intermediate-age open cluster NGC 2158

Giovanni Carraro (Padova), Leo Girardi (Trieste), Paola Marigo (Padova)

arxiv:astro-ph/0202018 v1 · 2002-02-01 · astro-ph

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{7SZQ2PWTXDEFIXCU6NO7VTAGMU}

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	2026-05-18T01:07:45.127874Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

fcb30d3ed3b8c8545c54f35dfacc06650154aa673fc244d948c643a2961c31b6

Aliases

arxiv: astro-ph/0202018 · arxiv_version: astro-ph/0202018v1 · doi: 10.48550/arxiv.astro-ph/0202018 · pith_short_12: 7SZQ2PWTXDEF · pith_short_16: 7SZQ2PWTXDEFIXCU · pith_short_8: 7SZQ2PWT

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/7SZQ2PWTXDEFIXCU6NO7VTAGMU \
  | 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: fcb30d3ed3b8c8545c54f35dfacc06650154aa673fc244d948c643a2961c31b6

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "088f104c1a99f27517b96a0024292106c349f780218e6770d65520eab4836183",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "2002-02-01T11:19:39Z",
    "title_canon_sha256": "f5e9c0c3c749bc31042c418c4c4fcb9f41d3fd77686ae15ac146fc40c33429e1"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/0202018",
    "kind": "arxiv",
    "version": 1
  }
}