Pith Number

pith:VPGTJQZI

pith:2015:VPGTJQZIESYU6CTRMKNJ7UTC2J

not attested not anchored not stored refs pending

The Composition of Comets

Adeline Gicquel, Anita L. Cochran, Anny-Chantal Levasseur-Regourd, David G. Schleicher, Dominique Bockelee-Morvan, Edith Hadamcik, Jeremie Lasue, Lucas Paganini, Martin Cordiner, Michael J. Mumma, Nicolas Biver, Steven B. Charnley, Yi-Jehng Kuan

arxiv:1507.00761 v1 · 2015-07-02 · astro-ph.EP

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

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	2026-05-18T01:35:44.760186Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

abcd34c32824b14f0a71629a9fd262d26bf92dd3a599cc7f75ff6ee16884242a

Aliases

arxiv: 1507.00761 · arxiv_version: 1507.00761v1 · doi: 10.48550/arxiv.1507.00761 · pith_short_12: VPGTJQZIESYU · pith_short_16: VPGTJQZIESYU6CTR · pith_short_8: VPGTJQZI

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/VPGTJQZIESYU6CTRMKNJ7UTC2J \
  | 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: abcd34c32824b14f0a71629a9fd262d26bf92dd3a599cc7f75ff6ee16884242a

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "9cdda4dbbbec312960069994207ab5f7c3c3e1c9a05e56fe0d8d3830699ef92f",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.EP",
    "submitted_at": "2015-07-02T20:43:05Z",
    "title_canon_sha256": "14010ba88a0e28be13836c57f8bc58ab60c0dc624417f85157f0ada136445ab1"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1507.00761",
    "kind": "arxiv",
    "version": 1
  }
}