Pith Number

pith:4G7ABO3H

pith:2011:4G7ABO3H4AZHSNOP3P2GPFFDPZ

not attested not anchored not stored refs pending

XHIP: An Extended Hipparcos Compilation

Charles Francis, Erik Anderson

arxiv:1108.4971 v2 · 2011-08-25 · astro-ph.GA · astro-ph.SR

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{4G7ABO3H4AZHSNOP3P2GPFFDPZ}

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	2026-05-18T02:00:48.403551Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

e1be00bb67e0327935cfdbf46794a37e54dbbb978d68204090a1cfedab4cb912

Aliases

arxiv: 1108.4971 · arxiv_version: 1108.4971v2 · doi: 10.48550/arxiv.1108.4971 · pith_short_12: 4G7ABO3H4AZH · pith_short_16: 4G7ABO3H4AZHSNOP · pith_short_8: 4G7ABO3H

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/4G7ABO3H4AZHSNOP3P2GPFFDPZ \
  | 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: e1be00bb67e0327935cfdbf46794a37e54dbbb978d68204090a1cfedab4cb912

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "5a4f692b17484e1b039d96d4c1762924d1d7dad7411c0bf13387a22949726bae",
    "cross_cats_sorted": [
      "astro-ph.SR"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2011-08-25T00:37:20Z",
    "title_canon_sha256": "125c3d7de5d9e70985f32489ec3e7c8b7142b522e30c36e41d1dd7e9442fa0b4"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1108.4971",
    "kind": "arxiv",
    "version": 2
  }
}