Pith Number

pith:IBI4UK4C

pith:2026:IBI4UK4CSR7HJJL2B5HDVRVYTF

not attested not anchored not stored refs resolved

Panchromatic View of the Frigid Jovian Exoplanet COCONUTS-2 b

Alice Radcliffe, Allan Denis, Arthur Vigan, Benjamin Charnay, Caroline V. Morley, Elena Manjavacas, Elisabeth C. Matthews, Gabriel-Dominique Marleau, Ga\"el Chauvin, Helena K\"uhnle, Jacqueline K. Faherty, James J. Mang, Jessica Copeland, Kevin Hoy, Ma\"el Voyer, Mark W. Phillips, Mathilde M\^alin, Matthieu Ravet, Micka\"el Bonnefoy, Pascal Tremblin, Paulina Palma-Bifani, Paul Molli\`ere, Rocio Kiman, Sam de Regt, Simon Petrus, Thomas K. Henning, Zhoujian Zhang

Panchromatic 1-15 micron observations with ATMO2020++ models constrain COCONUTS-2 b to 496 K, 1.03 Jupiter radii, and 7.3 Jupiter masses.

arxiv:2604.07176 v1 · 2026-04-08 · astro-ph.EP

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\usepackage{pith}
\pithnumber{IBI4UK4CSR7HJJL2B5HDVRVYTF}

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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

ATMO2020++ models yield constraints consistent with previous studies: T_eff =496^{+5}_{-3} K, log(g) =4.30^{+0.04}_{-0.02} dex, [M/H] =-0.02^{+0.03}_{-0.02} dex, R =1.03^{+0.01}_{-0.02} R_jup, and mass M =7.3±0.3 M_jup from cooling models given the system age.

C2weakest assumption

That the ATMO2020++ (and other) self-consistent atmospheric model grids accurately capture the physics and chemistry of this cold atmosphere, despite systematically underpredicting flux in the Y- and N-bands.

C3one line summary

Panchromatic 1-15 micron observations of COCONUTS-2 b yield Teff=496 K, log g=4.3, near-solar metallicity, radius 1.03 Rjup, luminosity log(L/Lsun)=-6.166, and mass 7.3 Mjup from evolutionary models.

References

93 extracted · 93 resolved · 0 Pith anchors

[1] Ackerman , A. S. & Marley , M. S. 2001, , 556, 872 2001

[2] 1974, IEEE Transactions on Automatic Control, 19, 716 1974

[3] K., Su \'a rez , G., et al 2025

[4] 2013, , 558, A109 2013

[5] 2005, , 434, 343 2005

Receipt and verification

First computed	2026-06-03T14:05:47.252815Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

4051ca2b82947e74a57a0f4e3ac6b899755af216cc428b745ee9e716858df4d5

Aliases

arxiv: 2604.07176 · arxiv_version: 2604.07176v1 · doi: 10.48550/arxiv.2604.07176 · pith_short_12: IBI4UK4CSR7H · pith_short_16: IBI4UK4CSR7HJJL2 · pith_short_8: IBI4UK4C

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/IBI4UK4CSR7HJJL2B5HDVRVYTF \
  | 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: 4051ca2b82947e74a57a0f4e3ac6b899755af216cc428b745ee9e716858df4d5

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "349890f4886a37edc039c3501d3faeb943d328497356960a8508452a616d10fd",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "astro-ph.EP",
    "submitted_at": "2026-04-08T15:05:17Z",
    "title_canon_sha256": "b2c2f24a62ad0e527c02c9c7185ae642e542000ed1825bb68ace72b227c43d8b"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2604.07176",
    "kind": "arxiv",
    "version": 1
  }
}