Pith Number

pith:Q4AWDWYI

pith:2026:Q4AWDWYIQSGJU3XLTTQLUSU6SA

not attested not anchored not stored refs pending

Large-scale Morphology of the Optical F-corona from a Total Solar Eclipse Observation During the Artemis II Lunar Flyby

Ko Arimatsu, Kohji Tsumura

A lunar flyby eclipse image shows the F-corona as a flattened ellipse aligned with the ecliptic, with radial brightness profiles supporting a dust density power-law index of about 1.3 near the Sun.

arxiv:2604.13908 v3 · 2026-04-15 · astro-ph.EP · astro-ph.SR

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\usepackage{pith}
\pithnumber{Q4AWDWYIQSGJU3XLTTQLUSU6SA}

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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

The observed F-corona exhibits a flattened, nearly elliptical morphology aligned with the ecliptic plane, with flattening indices of 0.52, 0.54, and 0.56 for the red, green, and blue channels, respectively. Radial intensity profiles along ecliptic longitude and latitude are well described by power laws in solar elongation, although the derived slopes are systematically steeper than previous observations. ... supporting a radial dust number-density power-law index of α ~1.3, even in regions near the Sun.

C2weakest assumption

Although the dataset is derived from a rendered RGB JPEG image without full photometric calibration, the gamma correction inherent to the image format was explicitly accounted for and the instrumental response was validated using field stars, enabling a reliable analysis of the relative morphology and brightness profiles.

C3one line summary

A total solar eclipse image from Artemis II reveals the F-corona as a flattened ellipse aligned with the ecliptic, with radial profiles supporting a dust density power-law index of approximately 1.3 near the Sun.

Formal links

2 machine-checked theorem links

Receipt and verification

First computed	2026-05-22T01:04:02.264244Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

870161db08848c9a6eeb9ce0ba4a9e9011fbde4af99722226ffb1d5d7a11e131

Aliases

arxiv: 2604.13908 · arxiv_version: 2604.13908v3 · doi: 10.48550/arxiv.2604.13908 · pith_short_12: Q4AWDWYIQSGJ · pith_short_16: Q4AWDWYIQSGJU3XL · pith_short_8: Q4AWDWYI

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/Q4AWDWYIQSGJU3XLTTQLUSU6SA \
  | 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: 870161db08848c9a6eeb9ce0ba4a9e9011fbde4af99722226ffb1d5d7a11e131

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "aa5b30edf5275e4d9f3af790cbf9e825dd4dba655f8d5c08d2203e7f08dc0fa3",
    "cross_cats_sorted": [
      "astro-ph.SR"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.EP",
    "submitted_at": "2026-04-15T14:17:43Z",
    "title_canon_sha256": "a8d62410efecea5c986f29e3462ac68610cf3d9c1c5a5bfc32dc0dc9d61d12ce"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2604.13908",
    "kind": "arxiv",
    "version": 3
  }
}