Pith Number

pith:UXPZWMRC

pith:2005:UXPZWMRCVXTFP3MSFPTFYVHWGP

not attested not anchored not stored refs pending

The Multitude of Molecular Hydrogen Knots in the Helix Nebula

Angela Speck (Univ. MO), Joel Hartman (Harvard-Smithsonian CfA), Margaret Meixner (STScI), Minho Son (JHU), Peter McCullough (STScI)

arxiv:astro-ph/0509887 v1 · 2005-09-29 · 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{UXPZWMRCVXTFP3MSFPTFYVHWGP}

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	2026-07-04T15:25:38.699525Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a5df9b3222ade657ed922be65c54f633d574ea600c2f590466f134c3c77e676d

Aliases

arxiv: astro-ph/0509887 · arxiv_version: astro-ph/0509887v1 · doi: 10.48550/arxiv.astro-ph/0509887 · pith_short_12: UXPZWMRCVXTF · pith_short_16: UXPZWMRCVXTFP3MS · pith_short_8: UXPZWMRC

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/UXPZWMRCVXTFP3MSFPTFYVHWGP \
  | 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: a5df9b3222ade657ed922be65c54f633d574ea600c2f590466f134c3c77e676d

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "8ff8f3a3dd1ae513c2370a784f3d5c8fc24b5d74776f12e3b98725165a5b07c3",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "2005-09-29T19:01:24Z",
    "title_canon_sha256": "debb80a04631b7e7761d9aaf3ae97a2473af3fced6d6fa2396c73bf6b99bf97b"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/0509887",
    "kind": "arxiv",
    "version": 1
  }
}