Pith Number

pith:ITO2K7JT

pith:2010:ITO2K7JT64ALXKLEY2BLCH5CLL

not attested not anchored not stored refs pending

Note about the impact possibilities of asteroid (99942) Apophis

Grzegorz Sitarski, Malgorzata Krolikowska

arxiv:1009.2639 v1 · 2010-09-14 · 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{ITO2K7JT64ALXKLEY2BLCH5CLL}

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	2026-05-18T04:40:56.671388Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

44dda57d33f700bba964c682b11fa25adf5910a80967b076b8f40497d82922db

Aliases

arxiv: 1009.2639 · arxiv_version: 1009.2639v1 · doi: 10.48550/arxiv.1009.2639 · pith_short_12: ITO2K7JT64AL · pith_short_16: ITO2K7JT64ALXKLE · pith_short_8: ITO2K7JT

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/ITO2K7JT64ALXKLEY2BLCH5CLL \
  | 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: 44dda57d33f700bba964c682b11fa25adf5910a80967b076b8f40497d82922db

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "e584cc799461f76075fd9223aa2ef1343474e3dc072561c4d78c292007af3cf1",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.EP",
    "submitted_at": "2010-09-14T12:38:26Z",
    "title_canon_sha256": "bd3642da002995927a6538b0b6350b40f2c20513949ad069e4022c8cbd99a2f5"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1009.2639",
    "kind": "arxiv",
    "version": 1
  }
}