Pith Number

pith:C2QLTQQ5

pith:2025:C2QLTQQ5XD7M6SWIZBFOXCF23D

not attested not anchored not stored refs pending

Initial Observations of the First BlueBird Spacecraft and a Model of Their Brightness

Anthony Mallama, Jay Respler, Richard E. Cole, Scott Harrington

arxiv:2505.05820 v1 · 2025-05-09 · astro-ph.IM · physics.ins-det · 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{C2QLTQQ5XD7M6SWIZBFOXCF23D}

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

Satellite Constellations Exceed the Limits of Acceptable Brightness Established by the IAU

Receipt and verification

First computed	2026-07-05T11:00:48.202444Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

16a0b9c21db8fecf4ac8c84aeb88bad8e4c51bdee66efc56f9ee05b079804592

Aliases

arxiv: 2505.05820 · arxiv_version: 2505.05820v1 · doi: 10.48550/arxiv.2505.05820 · pith_short_12: C2QLTQQ5XD7M · pith_short_16: C2QLTQQ5XD7M6SWI · pith_short_8: C2QLTQQ5

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/C2QLTQQ5XD7M6SWIZBFOXCF23D \
  | 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: 16a0b9c21db8fecf4ac8c84aeb88bad8e4c51bdee66efc56f9ee05b079804592

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "73f15f61a80f40d2240ec064e2f4f3c943f6e475dccc57c82d36542d85f2f803",
    "cross_cats_sorted": [
      "physics.ins-det",
      "physics.space-ph"
    ],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "astro-ph.IM",
    "submitted_at": "2025-05-09T06:46:42Z",
    "title_canon_sha256": "fc29596abcc00e47429aaaa81e4d9043a3f50942086fbf5b157589298fbff0f6"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2505.05820",
    "kind": "arxiv",
    "version": 1
  }
}