Pith Number

pith:2HXQ2R7H

pith:1999:2HXQ2R7HMLZJ7MPOBZ73XGHM3C

not attested not anchored not stored refs pending

Interferometric Astrometry of Proxima Centauri and Barnard's Star Using Hubble Space Telescope Fine Guidance Sensor 3: Detection Limits for sub-Stellar Companions

A. L. Whipple, Barbara McArthur, D. Cornell, D. Story, D. W. Chappell, E. Nelan, G.Fritz Benedict, J.Lee, L. H. Wasserman, L.W.Fredrick, Otto G. Franz, P.D. Hemenway, P. J. Shelus, R. L. Duncombe, W. H. Jefferys, W. van Altena

arxiv:astro-ph/9905318 v1 · 1999-05-25 · 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{2HXQ2R7HMLZJ7MPOBZ73XGHM3C}

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	2026-05-18T04:25:39.480859Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

d1ef0d47e762f29fb1ee0e7fbb98ecd88bd074e8e95b37e8d31c6a8d428277ca

Aliases

arxiv: astro-ph/9905318 · arxiv_version: astro-ph/9905318v1 · doi: 10.48550/arxiv.astro-ph/9905318 · pith_short_12: 2HXQ2R7HMLZJ · pith_short_16: 2HXQ2R7HMLZJ7MPO · pith_short_8: 2HXQ2R7H

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/2HXQ2R7HMLZJ7MPOBZ73XGHM3C \
  | 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: d1ef0d47e762f29fb1ee0e7fbb98ecd88bd074e8e95b37e8d31c6a8d428277ca

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "7d65759ef5e6c1d6662fb4b3aa6b984e87fe798fef7b54cea932c478cc098ce8",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "1999-05-25T17:24:24Z",
    "title_canon_sha256": "b3f176f4274a2caa2d417d2ae3f22f9b737431c0cee2fac99928771dd706f2a4"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/9905318",
    "kind": "arxiv",
    "version": 1
  }
}