Pith Number

pith:7XSRAVB4

pith:2012:7XSRAVB4ZWLMWQSQCMD5DUHT7U

not attested not anchored not stored refs pending

Habitable-zone super-Earth candidate in a six-planet system around the K2.5V star HD 40307

Ansgar Reiners, Enrico Gerlach, Eugenio J. Rivera, Guillem Anglada-Escude, Hugh R. R. Jones, Mikko Tuomi, R. Paul Butler, Steven S. Vogt

arxiv:1211.1617 v1 · 2012-11-07 · astro-ph.EP

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{7XSRAVB4ZWLMWQSQCMD5DUHT7U}

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	2026-05-18T01:53:18.474555Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

fde510543ccd96cb42501307d1d0f3fd02e28212e9a7d4d5e6242baa48b773f5

Aliases

arxiv: 1211.1617 · arxiv_version: 1211.1617v1 · doi: 10.48550/arxiv.1211.1617 · pith_short_12: 7XSRAVB4ZWLM · pith_short_16: 7XSRAVB4ZWLMWQSQ · pith_short_8: 7XSRAVB4

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/7XSRAVB4ZWLMWQSQCMD5DUHT7U \
  | 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: fde510543ccd96cb42501307d1d0f3fd02e28212e9a7d4d5e6242baa48b773f5

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "d1521ba6650818359ce29e0ecc2153e3e3ba798bc92c9b702820a09c60ebb528",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.EP",
    "submitted_at": "2012-11-07T17:30:34Z",
    "title_canon_sha256": "a7bd38b56243fcaed1c6290c7d61714ffb92e5821437e0459c13d364618ebacc"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1211.1617",
    "kind": "arxiv",
    "version": 1
  }
}