Pith Number

pith:CM3GOZVN

pith:2026:CM3GOZVNDJAS7ZZA5UE44WDTG7

not attested not anchored not stored refs pending

Polarimetry and albedo of the Near-Earth Asteroid 2025 FA22

A. Berdyugin, A. Cellino, E. Dotto, E. Frank, G. Borisov, J.-P. Rivet, L. Boulanger, L. Kolokolova, M. Devog\`ele, M. Lazzarin, P. Bendjoya, P. Fatka, P. Pravec, S. Bagnulo, S. Ieva, S. V. Berdyugina, the NEOPOPs team, V. Piirola, Y. G. Kwon, Z. Gray

Polarimetry of asteroid 2025 FA22 during close approach estimates its albedo at 0.17 and favors M-type taxonomy.

arxiv:2601.19770 v3 · 2026-01-27 · astro-ph.EP

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\pithnumber{CM3GOZVNDJAS7ZZA5UE44WDTG7}

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Record completeness

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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

Using empirical relationships, an estimate of the geometric albedo could be drawn from the slope of the phase-polarisation curve at inversion angle : ρ_v = 0.17±0.04 in the V band. This value, together with the spectropolarimetric trend, provides constraints on the taxonomic class, with the results being most consistent with an M-type classification.

C2weakest assumption

The empirical relationships used to convert the polarization slope at inversion to geometric albedo apply accurately to this asteroid, and the observed phase angles sufficiently sample the inversion region without significant systematic errors in the data.

C3one line summary

Polarimetric data on NEA 2025 FA22 yields albedo 0.17 and supports M-type classification via empirical relations.

Receipt and verification

First computed	2026-05-20T00:01:39.267924Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

13366766ad1a412fe720ed09ce587337f65df8dad664714de942c2160bf4f746

Aliases

arxiv: 2601.19770 · arxiv_version: 2601.19770v3 · doi: 10.48550/arxiv.2601.19770 · pith_short_12: CM3GOZVNDJAS · pith_short_16: CM3GOZVNDJAS7ZZA · pith_short_8: CM3GOZVN

Agent API

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Verify this Pith Number yourself

curl -sH 'Accept: application/ld+json' https://pith.science/pith/CM3GOZVNDJAS7ZZA5UE44WDTG7 \
  | 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: 13366766ad1a412fe720ed09ce587337f65df8dad664714de942c2160bf4f746

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "d605a0c7ec0843cc88081cab09ccb89937158aae774825d000ec11ccb80bb534",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "astro-ph.EP",
    "submitted_at": "2026-01-27T16:33:26Z",
    "title_canon_sha256": "cff233b27430f5f78a0a7975fceb7a5a92a009ee0559531c8648578bb017efa1"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2601.19770",
    "kind": "arxiv",
    "version": 3
  }
}