Pith Number

pith:PGTHQTUR

pith:2019:PGTHQTURQ2KZYAJU7VTX4JGRBJ

not attested not anchored not stored refs pending

Comet C/2018 V1 (Machholz-Fujikawa-Iwamoto): dislodged from the Oort Cloud or coming from interstellar space?

C. de la Fuente Marcos, R. de la Fuente Marcos

arxiv:1908.02666 v3 · 2019-08-07 · 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{PGTHQTURQ2KZYAJU7VTX4JGRBJ}

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	2026-07-05T00:00:27.649914Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

79a6784e9186959c0134fd677e24d10a638728d5c9aab190f16fe255ba041a66

Aliases

arxiv: 1908.02666 · arxiv_version: 1908.02666v3 · doi: 10.48550/arxiv.1908.02666 · pith_short_12: PGTHQTURQ2KZ · pith_short_16: PGTHQTURQ2KZYAJU · pith_short_8: PGTHQTUR

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/PGTHQTURQ2KZYAJU7VTX4JGRBJ \
  | 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: 79a6784e9186959c0134fd677e24d10a638728d5c9aab190f16fe255ba041a66

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "ee7a16ab1eb82f82b70ca24e7f41228e447ecab3bcae7d55fa5a9f5c8dc9db84",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.EP",
    "submitted_at": "2019-08-07T14:54:24Z",
    "title_canon_sha256": "76760a75f1914a28ddae4dce511e72bdca09583d242c551d60bf633a145157ad"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1908.02666",
    "kind": "arxiv",
    "version": 3
  }
}