Pith Number

pith:LSFYEJTQ

pith:1993:LSFYEJTQUHFCHUWAQ5FNANCIIX

not attested not anchored not stored refs pending

Angular Diameters of Compact Planetary Nebulae

Albert A. Zijlstra, Timothy R. Bedding

arxiv:astro-ph/9309020 v1 · 1993-09-14 · 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{LSFYEJTQUHFCHUWAQ5FNANCIIX}

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	2026-05-18T04:21:41.306175Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

5c8b822670a1ca23d2c0874ad0344845c503151b7f7e9f89150e4701322fb386

Aliases

arxiv: astro-ph/9309020 · arxiv_version: astro-ph/9309020v1 · doi: 10.48550/arxiv.astro-ph/9309020 · pith_short_12: LSFYEJTQUHFC · pith_short_16: LSFYEJTQUHFCHUWA · pith_short_8: LSFYEJTQ

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/LSFYEJTQUHFCHUWAQ5FNANCIIX \
  | 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: 5c8b822670a1ca23d2c0874ad0344845c503151b7f7e9f89150e4701322fb386

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "a72e4bd02ddb74653ac61165c89e382fec31c6dd33d51ab19abc0201e7e26b8d",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "1993-09-14T11:59:58Z",
    "title_canon_sha256": "a0c3ed8d88c2d94675cd3728a1675e9a9b6c4226d6a40dc76c28e7cfc11aac3c"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/9309020",
    "kind": "arxiv",
    "version": 1
  }
}