Pith Number

pith:7BEJRIBC

pith:2018:7BEJRIBC3QB7KIAYQBKBX3KBAM

not attested not anchored not stored refs pending

Surface Composition of (99942) Apophis

Juan Sanchez, Lucille Le Corre, Marina Brozovic, Paul Hardersen, Richard Binzel, Roberto Furfaro, Thomas Burbine, Vishnu Reddy, William Bottke

arxiv:1803.05375 v1 · 2018-03-14 · astro-ph.EP · astro-ph.IM

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{7BEJRIBC3QB7KIAYQBKBX3KBAM}

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	2026-05-18T00:20:34.451008Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

f84898a022dc03f5201880541bed410307c6bf2c18288784e76c94d1df1d34b2

Aliases

arxiv: 1803.05375 · arxiv_version: 1803.05375v1 · doi: 10.48550/arxiv.1803.05375 · pith_short_12: 7BEJRIBC3QB7 · pith_short_16: 7BEJRIBC3QB7KIAY · pith_short_8: 7BEJRIBC

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/7BEJRIBC3QB7KIAYQBKBX3KBAM \
  | 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: f84898a022dc03f5201880541bed410307c6bf2c18288784e76c94d1df1d34b2

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "7d2b26189859bb50eaa3ca781d5d608438fb752906886c771e5448f4a0da4828",
    "cross_cats_sorted": [
      "astro-ph.IM"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.EP",
    "submitted_at": "2018-03-14T15:55:57Z",
    "title_canon_sha256": "504a963c8a2ad420e45a11f5758d184ac13551a56f6e6f4738b3593e7d1a31c1"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1803.05375",
    "kind": "arxiv",
    "version": 1
  }
}