Pith Number

pith:U2XYI6U6

pith:2005:U2XYI6U6IZDYMBW2DEGZGTX4BX

not attested not anchored not stored refs pending

A Multi-Instrument Study of the Helix Nebula Knots with the Hubble Space Telescope

C. R. O'Dell, G. J. Ferland, W. J. Henney

arxiv:astro-ph/0504210 v1 · 2005-04-08 · 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{U2XYI6U6IZDYMBW2DEGZGTX4BX}

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.

Cited by

1 paper in Pith

SDSS-V LVM: Revealing the Physical and Chemical Structure of the Helix Nebula

Receipt and verification

First computed	2026-07-04T15:26:29.471679Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a6af847a9e46478606da190d934efc0dd73ca0ac1c9bed100b8ec08e03284f59

Aliases

arxiv: astro-ph/0504210 · arxiv_version: astro-ph/0504210v1 · doi: 10.48550/arxiv.astro-ph/0504210 · pith_short_12: U2XYI6U6IZDY · pith_short_16: U2XYI6U6IZDYMBW2 · pith_short_8: U2XYI6U6

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/U2XYI6U6IZDYMBW2DEGZGTX4BX \
  | 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: a6af847a9e46478606da190d934efc0dd73ca0ac1c9bed100b8ec08e03284f59

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "575d1465389ffab40ee4e770509ec8f95a76857090e1a3c560887feb9dd92361",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "2005-04-08T16:17:05Z",
    "title_canon_sha256": "2219a6bc26ea83eabbda9b9adbade3e5e8d3df831df037bdef230ae35e5f64f6"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/0504210",
    "kind": "arxiv",
    "version": 1
  }
}