Pith Number

pith:M7RXP7HP

pith:2021:M7RXP7HPFUSTIXLAPTMIWCJ7BV

not attested not anchored not stored refs pending

Constraining the Regolith Composition of Asteroid (16) Psyche via Laboratory Near-infrared Spectroscopy

Benjamin N.L. Sharkey, David C. Cantillo, Juan A. Sanchez, Matthew R.M. Izawa, Neil A. Pearson, Om Chabra, Tanner S. Campbell, Theodore Kareta, Vishnu Reddy

arxiv:2105.12712 v1 · 2021-05-26 · astro-ph.EP

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{M7RXP7HPFUSTIXLAPTMIWCJ7BV}

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	2026-07-05T02:43:41.716158Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

67e377fcef2d25345d607cd88b093f0d52890e361031af2d2a2d1cbe06ae09d3

Aliases

arxiv: 2105.12712 · arxiv_version: 2105.12712v1 · doi: 10.48550/arxiv.2105.12712 · pith_short_12: M7RXP7HPFUST · pith_short_16: M7RXP7HPFUSTIXLA · pith_short_8: M7RXP7HP

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/M7RXP7HPFUSTIXLAPTMIWCJ7BV \
  | 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: 67e377fcef2d25345d607cd88b093f0d52890e361031af2d2a2d1cbe06ae09d3

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "7d7f0fea04d5189069c7d37f3629db85cfcb8747ff2374d768c36d01df8d767f",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "astro-ph.EP",
    "submitted_at": "2021-05-26T17:49:26Z",
    "title_canon_sha256": "d369db3ae34e298ba5febab52f85225198e232d414e3e353a88e7eff95e8da27"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2105.12712",
    "kind": "arxiv",
    "version": 1
  }
}