Pith Number

pith:ZP2H3GXQ

pith:2010:ZP2H3GXQZQ5EQHNDFLN3QFUTPJ

not attested not anchored not stored refs pending

The NASA-UC Eta-Earth Program: II. A Planet Orbiting HD 156668 with a Minimum Mass of Four Earth Masses

Andrew W. Howard, Debra A. Fischer, Geoffrey W. Marcy, Gregory W. Henry, Howard Isaacson, Jason T. Wright, Jay Anderson, Jeff A. Valenti, John Asher Johnson, Nikolai E. Piskunov

arxiv:1003.3444 v1 · 2010-03-17 · 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{ZP2H3GXQZQ5EQHNDFLN3QFUTPJ}

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	2026-05-18T02:08:26.319886Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

cbf47d9af0cc3a481da32adbb816937a624fdc47bbf66a9ea4274321aa1a5d2f

Aliases

arxiv: 1003.3444 · arxiv_version: 1003.3444v1 · doi: 10.48550/arxiv.1003.3444 · pith_short_12: ZP2H3GXQZQ5E · pith_short_16: ZP2H3GXQZQ5EQHND · pith_short_8: ZP2H3GXQ

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/ZP2H3GXQZQ5EQHNDFLN3QFUTPJ \
  | 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: cbf47d9af0cc3a481da32adbb816937a624fdc47bbf66a9ea4274321aa1a5d2f

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "bd48d2880e1614d09b73a8e112da280395d13e803b1a7915f4a8e37b31c9f3e2",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.EP",
    "submitted_at": "2010-03-17T20:00:02Z",
    "title_canon_sha256": "321a58e563fc19955708c300db239261a7c62cbffd7e98bd1c99ecd05813b3d3"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1003.3444",
    "kind": "arxiv",
    "version": 1
  }
}