Pith Number

pith:B3LJX7SA

pith:2026:B3LJX7SAJ2KABQOPAISUVGXNFK

not attested not anchored not stored refs pending

A short-period binary OGLE-BLG-ELL-006503 showing slow variations in brightness

S. M. Rucinski

Eclipse timings in OGLE-BLG-ELL-006503 show an orbital period change on a two-million-year timescale.

arxiv:2604.26710 v2 · 2026-04-29 · astro-ph.SR

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\usepackage{pith}
\pithnumber{B3LJX7SAJ2KABQOPAISUVGXNFK}

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Record completeness

1 Bitcoin timestamp

2 Internet Archive

3 Author claim open · sign in to claim

4 Citations open

5 Replications open

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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.

Claims

C1strongest claim

The eclipse time O-C residuals reveal an orbital period change characterized by a timescale of approximately 2x10^6 years, suggesting a mild mass redistribution, potentially linked to global magnetic fields reconfiguration.

C2weakest assumption

Seasonal light-curves suggest that this long-term variability is driven by large photospheric spots (approx 0.3 stellar radii) that exhibit a tendency to orient themselves relative to the tidal interaction line.

C3one line summary

28-year OGLE observations of short-period binary OGLE-BLG-ELL-006503 show tidal variations plus long-term spot-driven brightness drifts and orbital period changes suggesting mild mass redistribution.

Receipt and verification

First computed	2026-05-22T01:03:19.488611Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

0ed69bfe404e9400c1cf02254a9aed2a9f94a3b2b279eef332b5333451367dda

Aliases

arxiv: 2604.26710 · arxiv_version: 2604.26710v2 · doi: 10.48550/arxiv.2604.26710 · pith_short_12: B3LJX7SAJ2KA · pith_short_16: B3LJX7SAJ2KABQOP · pith_short_8: B3LJX7SA

Agent API

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Verify this Pith Number yourself

curl -sH 'Accept: application/ld+json' https://pith.science/pith/B3LJX7SAJ2KABQOPAISUVGXNFK \
  | 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: 0ed69bfe404e9400c1cf02254a9aed2a9f94a3b2b279eef332b5333451367dda

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "40a8fd0be1870e2a4f8944fd7c75ec9b41c7144666574b1373b091797f30bb2d",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "astro-ph.SR",
    "submitted_at": "2026-04-29T14:17:08Z",
    "title_canon_sha256": "27a20c6c87c13d2728737b80aa1310296c85c6e7139f17d08d5eac6bf9b789ae"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2604.26710",
    "kind": "arxiv",
    "version": 2
  }
}