Pith Number

pith:BHHCOPSK

pith:2014:BHHCOPSKWESQF6YFBFXFIEKKOD

not attested not anchored not stored refs pending

Radio-Optical Reference Frame Link Using the US Naval Observatory Astrograph and Deep CCD Imaging

Marion I. Zacharias, Norbert Zacharias

arxiv:1402.4427 v1 · 2014-02-18 · astro-ph.IM · astro-ph.CO · astro-ph.GA

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{BHHCOPSKWESQF6YFBFXFIEKKOD}

Prints a linked badge after your title and injects PDF metadata. Compiles on arXiv. Learn more

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	2026-05-18T01:44:36.733455Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

09ce273e4ab12502fb05096e54114a70cda23c1ec50af458e693dc0355473d0e

Aliases

arxiv: 1402.4427 · arxiv_version: 1402.4427v1 · doi: 10.48550/arxiv.1402.4427 · pith_short_12: BHHCOPSKWESQ · pith_short_16: BHHCOPSKWESQF6YF · pith_short_8: BHHCOPSK

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/BHHCOPSKWESQF6YFBFXFIEKKOD \
  | 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: 09ce273e4ab12502fb05096e54114a70cda23c1ec50af458e693dc0355473d0e

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "e61607e66114f1e31be64454a2030a679bbe2a60e32b6f9d72b0764784351c24",
    "cross_cats_sorted": [
      "astro-ph.CO",
      "astro-ph.GA"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.IM",
    "submitted_at": "2014-02-18T18:27:33Z",
    "title_canon_sha256": "402b583582b8374ef92a0ab3da80ac6665702e8a1b69240e6e52c91d8452c3d0"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1402.4427",
    "kind": "arxiv",
    "version": 1
  }
}