Pith Number

pith:SI4SIFNL

pith:2009:SI4SIFNLCPTSCKF6G7UWFEQYZM

not attested not anchored not stored refs pending

Constraints on the Source of Lunar Cataclysm Impactors

Brett J. Gladman, Matija Cuk, Sarah T. Stewart

arxiv:0912.1847 v1 · 2009-12-10 · astro-ph.EP

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{SI4SIFNLCPTSCKF6G7UWFEQYZM}

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	2026-05-18T04:30:14.639739Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

92392415ab13e72128be37e9629218cb29f366a39c50fb2a206142b93215acd2

Aliases

arxiv: 0912.1847 · arxiv_version: 0912.1847v1 · doi: 10.48550/arxiv.0912.1847 · pith_short_12: SI4SIFNLCPTS · pith_short_16: SI4SIFNLCPTSCKF6 · pith_short_8: SI4SIFNL

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/SI4SIFNLCPTSCKF6G7UWFEQYZM \
  | 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: 92392415ab13e72128be37e9629218cb29f366a39c50fb2a206142b93215acd2

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "c1f4fc4b63c739e2bf1b261bf2a68c84b22b49af28820b226b1a46e7243a9147",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.EP",
    "submitted_at": "2009-12-10T00:35:35Z",
    "title_canon_sha256": "61292dcf63a46214db3969a5d9ef8a80a40a480847f7c1ed0a3b17e515fc286e"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0912.1847",
    "kind": "arxiv",
    "version": 1
  }
}