Pith Number

pith:CGUTITNX

pith:2009:CGUTITNXNUFE5OD6XMSO4S3K7N

not attested not anchored not stored refs pending

The HD 40307 Planetary System: Super-Earths or Mini-Neptunes?

Andrew A. West, Brian Jackson, Richard Greenberg, Rory Barnes, Sean N. Raymond

arxiv:0901.1698 v1 · 2009-01-13 · astro-ph.EP

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{CGUTITNXNUFE5OD6XMSO4S3K7N}

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	2026-05-18T04:29:23.920836Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

11a9344db76d0a4eb87ebb24ee4b6afb555ea9f5e0e51587e9c6564e30ab9557

Aliases

arxiv: 0901.1698 · arxiv_version: 0901.1698v1 · doi: 10.48550/arxiv.0901.1698 · pith_short_12: CGUTITNXNUFE · pith_short_16: CGUTITNXNUFE5OD6 · pith_short_8: CGUTITNX

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/CGUTITNXNUFE5OD6XMSO4S3K7N \
  | 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: 11a9344db76d0a4eb87ebb24ee4b6afb555ea9f5e0e51587e9c6564e30ab9557

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "06c17610b88ec4ef63de0d08e4151b62eb25e747dd29e4fd6469ff7a54453456",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.EP",
    "submitted_at": "2009-01-13T01:23:17Z",
    "title_canon_sha256": "ce01b8a6875e03401326998efe8cc286842a1c648bfb6809e5eee8d5bde45156"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0901.1698",
    "kind": "arxiv",
    "version": 1
  }
}