Pith Number

pith:QDWL55XG

pith:2026:QDWL55XGSLT2ZVBPQXYA2S2I7V

not attested not anchored not stored refs resolved

The Close Binary V486 Carinae

Ahmet Erdem, Burcu Ozkardes, Edwin Budding, Mark G. Blackford, Michael D. Rhodes, Timothy S. Banks, Tom Love, Volkan Bakis

V486 Car is a near-contact binary with masses 2.1 and 0.4 solar masses plus a possible 0.3 solar-mass companion a few AU away.

arxiv:2605.14208 v1 · 2026-05-14 · astro-ph.SR

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Add to your LaTeX paper

\usepackage{pith}
\pithnumber{QDWL55XGSLT2ZVBPQXYA2S2I7V}

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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

✓ 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.

Claims

C1strongest claim

We find: M1 = 2.1 ± 0.1, M2 = 0.4 ± 0.1; R1 = 3.20 ± 0.02, R2 = 1.48 ± 0.01; (⊙); Te1 = 10000 ± 500, Te2 = 6200 ± 200 (K); distance = 162 ± 12 (pc). New times of minima ... indicate the presence of a low mass star ∼0.3 M⊙ in an orbit separated by a few AU from the close binary.

C2weakest assumption

That reliable physical parameters can be extracted despite only shallow eclipses and sinusoidal light variations that are merely suggestive of a near-contact configuration, as stated in the abstract.

C3one line summary

V486 Car is a near-contact binary with component masses 2.1 and 0.4 solar masses, radii 3.2 and 1.48 solar radii, temperatures 10000 K and 6200 K, plus evidence for a ~0.3 solar mass companion at a few AU.

References

96 extracted · 96 resolved · 3 Pith anchors

[3] Data reduction and error analysis for the physical sciences

[4] American Astronomical Society Meeting Abstracts , year = 2002, series = 2002

[5] A Guide to Close Binary Systems , author=. 2022 , publisher= 2022

[6] Introduction to Astronomical Photometry , author=. 2007 , publisher= 2007

[8] Ellipsoidal figures of equilibrium

Formal links

2 machine-checked theorem links

Receipt and verification

First computed	2026-05-17T23:39:10.957761Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

80ecbef6e692e7acd42f85f00d4b48fd4762848d74c0e0bd6fd3d290337c0187

Aliases

arxiv: 2605.14208 · arxiv_version: 2605.14208v1 · doi: 10.48550/arxiv.2605.14208 · pith_short_12: QDWL55XGSLT2 · pith_short_16: QDWL55XGSLT2ZVBP · pith_short_8: QDWL55XG

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/QDWL55XGSLT2ZVBPQXYA2S2I7V \
  | 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: 80ecbef6e692e7acd42f85f00d4b48fd4762848d74c0e0bd6fd3d290337c0187

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "7b8930f60a22ffb312ec7e5d35867dbacc23bbf65a3d0dcd789cd0dc9a7cbd64",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "astro-ph.SR",
    "submitted_at": "2026-05-14T00:06:57Z",
    "title_canon_sha256": "58b38e150666bfb2d44a5cc1842204c94b07fe73687d88d3e4210eae7622aa38"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2605.14208",
    "kind": "arxiv",
    "version": 1
  }
}