Pith Number

pith:HFYL7AFY

pith:2019:HFYL7AFYCFNL2ACWJHRFM2BJYP

not attested not anchored not stored refs pending

Properties of the Bare Nucleus of Comet 96P/Machholz 1

Alan Fitzsimmons, Colin Snodgrass, Matthew M. Knight, Michael S.P. Kelley, Nora L. Eisner, Rosita Kokotanekova

arxiv:1903.10500 v2 · 2019-03-21 · 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{HFYL7AFYCFNL2ACWJHRFM2BJYP}

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	2026-05-17T23:47:25.053403Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

3970bf80b8115abd005649e2566829c3fe21d9bb096f91ae2e71c0070cad0c77

Aliases

arxiv: 1903.10500 · arxiv_version: 1903.10500v2 · doi: 10.48550/arxiv.1903.10500 · pith_short_12: HFYL7AFYCFNL · pith_short_16: HFYL7AFYCFNL2ACW · pith_short_8: HFYL7AFY

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/HFYL7AFYCFNL2ACWJHRFM2BJYP \
  | 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: 3970bf80b8115abd005649e2566829c3fe21d9bb096f91ae2e71c0070cad0c77

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "08eb32f58739527670bb474c402c7fffcb04142b3c221ed2cc2465e827c22849",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.EP",
    "submitted_at": "2019-03-21T18:00:01Z",
    "title_canon_sha256": "6e77771de1c67bbdcde72c227aa3badf18ba787a98cbfea3fcc0b7c32584ba4b"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1903.10500",
    "kind": "arxiv",
    "version": 2
  }
}