Pith Number

pith:D4QG3UBE

pith:2012:D4QG3UBEMEAQWWLFY4RPL2AVIF

not attested not anchored not stored refs pending

Comet 22P/Kopff: Dust environment and grain ejection anisotropy from visible and infrared observations

Alfredo Sota, Esteban Reina, Fernando Moreno, Francisco Aceituno, Francisco Pozuelos, Julio Castellano, Victor Casanova

arxiv:1204.3998 v1 · 2012-04-18 · 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{D4QG3UBEMEAQWWLFY4RPL2AVIF}

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	2026-05-18T01:57:49.509675Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

1f206dd02461010b5965c722f5e815415a784ae152b50024c75b4013bf557113

Aliases

arxiv: 1204.3998 · arxiv_version: 1204.3998v1 · doi: 10.48550/arxiv.1204.3998 · pith_short_12: D4QG3UBEMEAQ · pith_short_16: D4QG3UBEMEAQWWLF · pith_short_8: D4QG3UBE

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/D4QG3UBEMEAQWWLFY4RPL2AVIF \
  | 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: 1f206dd02461010b5965c722f5e815415a784ae152b50024c75b4013bf557113

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "17a913da30e7c77e3b63ba699ec0877462f1509f5e927d0600358e6698c05d39",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.EP",
    "submitted_at": "2012-04-18T07:48:52Z",
    "title_canon_sha256": "82200754d03d2e2a5771986e9192d07ea25af5771af44c43e4c1cb5badc46aec"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1204.3998",
    "kind": "arxiv",
    "version": 1
  }
}