Pith Number

pith:NNSJNN2T

pith:2011:NNSJNN2TQXDWDAEKK4GW5FUUG4

not attested not anchored not stored refs pending

Young Planetary Nebulae: Hubble Space Telescope Imaging and a New Morphological Classification System

Gregory G. Villar, Mark R. Morris, Raghvendra Sahai

arxiv:1101.2214 v1 · 2011-01-11 · astro-ph.GA · astro-ph.SR · physics.space-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{NNSJNN2TQXDWDAEKK4GW5FUUG4}

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	2026-05-18T02:03:42.844389Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

6b6496b75385c761808a570d6e96943724f9575719645ea82348e2baeeed5084

Aliases

arxiv: 1101.2214 · arxiv_version: 1101.2214v1 · doi: 10.48550/arxiv.1101.2214 · pith_short_12: NNSJNN2TQXDW · pith_short_16: NNSJNN2TQXDWDAEK · pith_short_8: NNSJNN2T

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/NNSJNN2TQXDWDAEKK4GW5FUUG4 \
  | 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: 6b6496b75385c761808a570d6e96943724f9575719645ea82348e2baeeed5084

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "8a02d5af522aa2ce0437c565336f580e685e56f859e19d3e6b4e469e1e754596",
    "cross_cats_sorted": [
      "astro-ph.SR",
      "physics.space-ph"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2011-01-11T21:27:48Z",
    "title_canon_sha256": "098ba6ddb80936372f7babd5e8598379fb4a803b3ffc0aafd7ccb80edfa80782"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1101.2214",
    "kind": "arxiv",
    "version": 1
  }
}