Pith Number

pith:FBEXJEL6

pith:2021:FBEXJEL6FMMOSMC4R3FFA7JTWR

not attested not anchored not stored refs pending

htof: A new open-source tool for analyzing Hipparcos, Gaia, and future astrometric missions

Daniel Michalik, G. Mirek Brandt, Timothy D. Brandt, Trent J. Dupuy, Yiting Li, Yunlin Zeng

arxiv:2109.06761 v2 · 2021-09-14 · astro-ph.IM · astro-ph.EP · 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{FBEXJEL6FMMOSMC4R3FFA7JTWR}

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	2026-07-05T03:32:20.863147Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

284974917e2b18e9305c8eca507d33b44d717a65239fc36dc11ad8c9fc77a27f

Aliases

arxiv: 2109.06761 · arxiv_version: 2109.06761v2 · doi: 10.48550/arxiv.2109.06761 · pith_short_12: FBEXJEL6FMMO · pith_short_16: FBEXJEL6FMMOSMC4 · pith_short_8: FBEXJEL6

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/FBEXJEL6FMMOSMC4R3FFA7JTWR \
  | 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: 284974917e2b18e9305c8eca507d33b44d717a65239fc36dc11ad8c9fc77a27f

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "d722cd3cd3c0d3758a850657085227835e1d9684efb619adca4c7814aafc3a27",
    "cross_cats_sorted": [
      "astro-ph.EP",
      "astro-ph.GA",
      "astro-ph.SR"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.IM",
    "submitted_at": "2021-09-14T15:26:44Z",
    "title_canon_sha256": "f4f7546edab06c612e0718115891cc6443f8833e5e1dbd1678f32fdfbb954bd1"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2109.06761",
    "kind": "arxiv",
    "version": 2
  }
}