Pith Number

pith:JPPC4PIX

pith:1997:JPPC4PIXDARF225H4MLRX752YB

not attested not anchored not stored refs pending

The radial scale length of the Milky Way

C. Porcel, E. Battaner, F. Garzon, J. Jimenez-Vicente

arxiv:astro-ph/9710197 v1 · 1997-10-17 · astro-ph

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{JPPC4PIXDARF225H4MLRX752YB}

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	2026-05-18T01:07:38.039843Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

4bde2e3d1718225d6ba7e3171bffbac04fc39b86ed05e416223ed9180dc904a7

Aliases

arxiv: astro-ph/9710197 · arxiv_version: astro-ph/9710197v1 · doi: 10.48550/arxiv.astro-ph/9710197 · pith_short_12: JPPC4PIXDARF · pith_short_16: JPPC4PIXDARF225H · pith_short_8: JPPC4PIX

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/JPPC4PIXDARF225H4MLRX752YB \
  | 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: 4bde2e3d1718225d6ba7e3171bffbac04fc39b86ed05e416223ed9180dc904a7

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "4fc2783e46c4b25c92fc29f421b98636978ade4a946f89f83de07436f187fd73",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "1997-10-17T15:56:16Z",
    "title_canon_sha256": "ec1f491d616cf77bbca106b2e4adf23d613a02676493a0e66b103d2959ee8026"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/9710197",
    "kind": "arxiv",
    "version": 1
  }
}