Pith Number

pith:IJHBULM2

pith:2012:IJHBULM2CK3UKQE4ELIXCXEBJD

not attested not anchored not stored refs pending

The star catalogues of Ptolemaios and Ulugh Beg: Machine-readable versions and comparison with the modern Hipparcos Catalogue

Frank Verbunt, Robert H. van Gent

arxiv:1206.0628 v1 · 2012-06-04 · astro-ph.IM

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{IJHBULM2CK3UKQE4ELIXCXEBJD}

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	2026-05-18T01:57:08.225964Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

424e1a2d9a12b745409c22d1715c8148c542fe522b71b35e69f3873ddfc4e74b

Aliases

arxiv: 1206.0628 · arxiv_version: 1206.0628v1 · doi: 10.48550/arxiv.1206.0628 · pith_short_12: IJHBULM2CK3U · pith_short_16: IJHBULM2CK3UKQE4 · pith_short_8: IJHBULM2

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/IJHBULM2CK3UKQE4ELIXCXEBJD \
  | 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: 424e1a2d9a12b745409c22d1715c8148c542fe522b71b35e69f3873ddfc4e74b

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "f87b76862b133e0e5effd9aac5e856e5e1851ac670cf7b869ea0a7ac0b5626a6",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.IM",
    "submitted_at": "2012-06-04T14:20:09Z",
    "title_canon_sha256": "d263e0452ef7729754fea93525c73829ed5c9594d58e4d1001493e006945eed0"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1206.0628",
    "kind": "arxiv",
    "version": 1
  }
}