Pith Number

pith:PTHJ3B3Y

pith:2021:PTHJ3B3YIBLG6M2PF6WNQCCR6R

not attested not anchored not stored refs pending

SPARK: SPAcecraft Recognition leveraging Knowledge of Space Environment

Djamila Aouada, Kassem Al Ismaeil, Marcos Damian Perez, Michel Poucet, Mohamed Adel Musallam, Oyebade Oyedotun

arxiv:2104.05978 v2 · 2021-04-13 · cs.CV · cs.LG

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{PTHJ3B3YIBLG6M2PF6WNQCCR6R}

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

Collaborative Space Object Detection with Multi-Satellite Viewpoints in LEO Constellations

Receipt and verification

First computed	2026-07-05T02:32:05.387492Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

7cce9d877840566f334f2facd80851f4748d69b63c2286b2a628f4932d496144

Aliases

arxiv: 2104.05978 · arxiv_version: 2104.05978v2 · doi: 10.48550/arxiv.2104.05978 · pith_short_12: PTHJ3B3YIBLG · pith_short_16: PTHJ3B3YIBLG6M2P · pith_short_8: PTHJ3B3Y

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/PTHJ3B3YIBLG6M2PF6WNQCCR6R \
  | 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: 7cce9d877840566f334f2facd80851f4748d69b63c2286b2a628f4932d496144

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "bbf7e9f008d9436e96e12685233478b5a10038a3f29b0853998f5ce56a1ba29d",
    "cross_cats_sorted": [
      "cs.LG"
    ],
    "license": "http://creativecommons.org/licenses/by-nc-sa/4.0/",
    "primary_cat": "cs.CV",
    "submitted_at": "2021-04-13T07:16:55Z",
    "title_canon_sha256": "a1670d20360fc0d25ecbda0c1c5a58a9c7c7e57722e3eb2c43958202dc2f419f"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2104.05978",
    "kind": "arxiv",
    "version": 2
  }
}