Pith Number

pith:TXVMO52I

pith:2018:TXVMO52IUWCBJE4I5UXSQ35EQR

not attested not anchored not stored refs pending

Astrometry history: Hipparcos from 1964 to 1980

Erik H{\o}g

arxiv:1804.10881 v1 · 2018-04-29 · physics.hist-ph · 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{TXVMO52IUWCBJE4I5UXSQ35EQR}

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	2026-05-18T00:17:15.253083Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

9deac77748a584149388ed2f286fa48477bf1b3617c0651087ad88a7010f46bb

Aliases

arxiv: 1804.10881 · arxiv_version: 1804.10881v1 · doi: 10.48550/arxiv.1804.10881 · pith_short_12: TXVMO52IUWCB · pith_short_16: TXVMO52IUWCBJE4I · pith_short_8: TXVMO52I

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/TXVMO52IUWCBJE4I5UXSQ35EQR \
  | 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: 9deac77748a584149388ed2f286fa48477bf1b3617c0651087ad88a7010f46bb

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "f52958f9799602f7e70039904fb96655f9513f545e37c5734ce608f7b333adf6",
    "cross_cats_sorted": [
      "astro-ph.IM"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "physics.hist-ph",
    "submitted_at": "2018-04-29T06:40:14Z",
    "title_canon_sha256": "0d7c3b8cc8393e5c8478b2418a18f581aa935c0de1984cf166011d341dcac3cb"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1804.10881",
    "kind": "arxiv",
    "version": 1
  }
}