Pith Number

pith:WVNBEQ52

pith:2011:WVNBEQ52XPCRH3AMPYPOD3AUIY

not attested not anchored not stored refs pending

Early star catalogues of the southern sky: De Houtman, Kepler (Second and Third Classes), and Halley

Frank Verbunt (Astronomical Institute Utrecht), Robert H. van Gent (History of Science Utrecht)

arxiv:1104.0946 v1 · 2011-04-05 · 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{WVNBEQ52XPCRH3AMPYPOD3AUIY}

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.

Cited by

1 paper in Pith

The forgotten bright star: Theta Eridani as a millenary stellar transient observed by Hipparchus, Ptolemy and al-Sufi

Receipt and verification

First computed	2026-05-18T02:02:37.553536Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

b55a1243babbc513ec0c7e1ee1ec14461b268c6dde0837741ee0ca5791ffd06f

Aliases

arxiv: 1104.0946 · arxiv_version: 1104.0946v1 · doi: 10.48550/arxiv.1104.0946 · pith_short_12: WVNBEQ52XPCR · pith_short_16: WVNBEQ52XPCRH3AM · pith_short_8: WVNBEQ52

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/WVNBEQ52XPCRH3AMPYPOD3AUIY \
  | 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: b55a1243babbc513ec0c7e1ee1ec14461b268c6dde0837741ee0ca5791ffd06f

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "2e4d5b03580c30bcf83fa9586e56af86351e794167e40e4f7d29b11be3c14fef",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.IM",
    "submitted_at": "2011-04-05T20:05:52Z",
    "title_canon_sha256": "25f328152539e6d45b476bcd7874f58508f481c76c12bd5381360e3b5271e13c"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1104.0946",
    "kind": "arxiv",
    "version": 1
  }
}