Pith Number

pith:EHFSAISO

pith:2002:EHFSAISOT2LYLFVB2C67T4A7Z7

not attested not anchored not stored refs pending

Chemical Processes in Cometary Comae

(2) SMTO-Steward Observatory, (3) Leiden Observatory), H. M. Butner (2), P. Ehrenfreund (3) ((1) NASA Ames Research Center, S. B. Charnley (1), S. D. Rodgers (1)

arxiv:astro-ph/0204381 v1 · 2002-04-23 · 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{EHFSAISOT2LYLFVB2C67T4A7Z7}

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	2026-05-18T01:40:42.914156Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

21cb20224e9e978596a1d0bdf9f01fcfdf2255810e935513287257e857bf8bea

Aliases

arxiv: astro-ph/0204381 · arxiv_version: astro-ph/0204381v1 · doi: 10.48550/arxiv.astro-ph/0204381 · pith_short_12: EHFSAISOT2LY · pith_short_16: EHFSAISOT2LYLFVB · pith_short_8: EHFSAISO

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/EHFSAISOT2LYLFVB2C67T4A7Z7 \
  | 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: 21cb20224e9e978596a1d0bdf9f01fcfdf2255810e935513287257e857bf8bea

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "7895167d0f0fc215853a371d22b1115c206ac1645590d754d19e8a168b069aab",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "2002-04-23T09:40:21Z",
    "title_canon_sha256": "11d57ae0368f5dd3e38311d54a646f47251f2ce32cfbcbd7ff33b44b9c59f56d"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/0204381",
    "kind": "arxiv",
    "version": 1
  }
}