Pith Number

pith:2W7MIPEI

pith:2011:2W7MIPEIHZFDVXK2GZUGYCOLKQ

not attested not anchored not stored refs pending

Two Earth-sized planets orbiting Kepler-20

Andrew W. Howard, Christopher E. Henze, Courtney D. Dressing, Daniel C. Fabrycky, Darin Ragozzine, David Charbonneau, David G. Koch, David R. Ciardi, David W. Latham, Dimitar D. Sasselov, Eric B. Ford, Fergal Mullally, Francois Fressin, Geoffrey W. Marcy, Guillermo Torres, Jack J. Lissauer, Jason F. Rowe, Jean-Michel Desert, Jon M. Jenkins, Joseph D. Twicken, Kamal Uddin, Lars A. Buchhave, Leslie A. Rogers, Martin Still, Matthew J. Holman, Natalie M. Batalha, Samuel N. Quinn, Sarah Ballard, Sara Seager, Shawn E. Seader, Stephen T. Bryson, Steve B. Howell, Susan E. Thompson, Thomas Barclay, Thomas N. Gautier III, William J. Borucki

arxiv:1112.4550 v1 · 2011-12-20 · 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{2W7MIPEIHZFDVXK2GZUGYCOLKQ}

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	2026-05-18T04:05:58.585876Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

d5bec43c883e4a3add5a36686c09cb543ef4b49c241ab25f81d14e063c39e41f

Aliases

arxiv: 1112.4550 · arxiv_version: 1112.4550v1 · doi: 10.48550/arxiv.1112.4550 · pith_short_12: 2W7MIPEIHZFD · pith_short_16: 2W7MIPEIHZFDVXK2 · pith_short_8: 2W7MIPEI

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/2W7MIPEIHZFDVXK2GZUGYCOLKQ \
  | 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: d5bec43c883e4a3add5a36686c09cb543ef4b49c241ab25f81d14e063c39e41f

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "12c965ae970d8850dae812e90710113d597376e2a524e551e4632ae04c996c43",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.EP",
    "submitted_at": "2011-12-20T02:53:06Z",
    "title_canon_sha256": "98163f2e3607f0435af99d042cfca19d282880a0bb9a4c263ad0d3150628e359"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1112.4550",
    "kind": "arxiv",
    "version": 1
  }
}