← The evidence ledger
Evidence row 2201365
Observed , by sync.x402_bazaar/1.
- Kind
- listing
- About
- source_record x402_bazaar:https://space-objects.x402tookit.com/asteroid-size
- Recorded
- Previous row
- None: the first of its kind about this subject
- Body SHA-256
- ece35a9dc0c27cb22da0447f46bf3e4cc3b6f226aa751ca1bc16c95ccedf9249
- Leaf
- 0xff80f394760860ef605cff0edbb0f7f907b0f6ea95700598319f79c788390a54
What was observed
{
"endpoints": [
[
"x402",
"https://space-objects.x402tookit.com/asteroid-size"
]
],
"name": "Space Objects",
"owner_address": "0xb531320805c5bed1d46aeadcf4f008fdf172dbda",
"raw": {
"accepts": [
{
"amount": "20000",
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"maxTimeoutSeconds": 300,
"network": "eip155:8453",
"payTo": "0xb531320805C5BED1D46AEaDcF4F008FDF172DBDa",
"scheme": "exact"
},
{
"amount": "20000",
"asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
"extra": {
"feePayer": "D6ZhtNQ5nT9ZnTHUbqXZsTx5MH2rPFiBBggX4hY1WePM",
"transactionVersions": [
0
]
},
"maxTimeoutSeconds": 300,
"network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
"payTo": "DUPiupXtuox38dcGoXUKer5mAydCzmaHjrbQ66qeEm8s",
"scheme": "exact"
},
{
"amount": "20000",
"asset": "0x3c499c542cEF5E3811e1192ce70d8cC03d5c3359",
"extra": {
"name": "USD Coin",
"version": "2"
},
"maxTimeoutSeconds": 300,
"network": "eip155:137",
"payTo": "0xb531320805C5BED1D46AEaDcF4F008FDF172DBDa",
"scheme": "exact"
},
{
"amount": "20000",
"asset": "0xaf88d065e77c8cC2239327C5EDb3A432268e5831",
"extra": {
"name": "USD Coin",
"version": "2"
},
"maxTimeoutSeconds": 300,
"network": "eip155:42161",
"payTo": "0xb531320805C5BED1D46AEaDcF4F008FDF172DBDa",
"scheme": "exact"
}
],
"description": "Asteroid diameter from absolute magnitude H and albedo (or a dark-to-bright range), plus optional impact energy in megatons.",
"extensions": {
"bazaar": {
"info": {
"input": {
"method": "GET",
"queryParams": {
"H": 19.09,
"albedo": 0.35,
"velocityKmS": 20
},
"type": "http"
},
"output": {
"example": {
"absoluteMagnitudeH": 19.09,
"albedo": 0.35,
"asOf": "2026-10-11T08:41:41.604Z",
"degraded": false,
"diameterKm": 0.342,
"diameterM": 342,
"disclaimer": "Screening signal computed from the named public source. Not financial, legal or investment advice; provided as is. Verify at the source before acting.",
"formula": "D(km) = 1329 / sqrt(albedo) * 10^(-H/5)",
"impact": {
"densityKgM3": 2600,
"diameterKmUsed": 0.342,
"energyHiroshimaEquivalents": 173000,
"energyJoules": 10900000000000000000,
"energyMegatonsTnt": 2590,
"massKg": 54300000000,
"speedKmS": 20
},
"notChecked": [
"real shape: this treats the body as a sphere",
"the real albedo when none is given: sizes are uncertain by a factor of about two",
"…2 more"
],
"reasons": [
"Size from magnitude is only as good as the albedo: dark bodies are much larger than bright ones at the same H."
],
"source": "computed locally",
"summary": "H 19.09 with albedo 0.35 gives a diameter of about 342 m. At 20 km/s and 2600 kg/m3 a body of 342 m carries about 2590 megatons of TNT of kinetic energy.",
"verdict": "COMPUTED"
},
"type": "json"
}
},
"schema": {
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
"method": {
"enum": [
"GET"
],
"type": "string"
},
"queryParams": {
"properties": {
"H": {
"description": "Absolute magnitude H, -5 to 40",
"type": "number"
},
"albedo": {
"description": "Geometric albedo 0.01 to 1; omit for the 0.05 to 0.25 range",
"type": "number"
},
"densityKgM3": {
"description": "Bulk density 500 to 8000 kg/m3 (default 2600)",
"type": "number"
},
"velocityKmS": {
"description": "Impact speed 5 to 72 km/s, to also get impact energy",
"type": "number"
}
},
"required": [
"H"
],
"type": "object"
},
"type": {
"const": "http",
"type": "string"
}
},
"required": [
"type",
"method"
],
"type": "object"
},
"output": {
"properties": {
"example": {
"properties": {
"absoluteMagnitudeH": {
"type": [
"null",
"number"
]
},
"albedo": {
"type": [
"null",
"number"
]
},
"asOf": {
"type": [
"null",
"string"
]
},
"degraded": {
"type": [
"boolean",
"null"
]
},
"diameterKm": {
"type": [
"null",
"number"
]
},
"diameterM": {
"type": [
"null",
"number"
]
},
"disclaimer": {
"type": [
"null",
"string"
]
},
"formula": {
"type": [
"null",
"string"
]
},
"impact": {
"properties": {
"densityKgM3": {
"type": [
"null",
"number"
]
},
"diameterKmUsed": {
"type": [
"null",
"number"
]
},
"energyHiroshimaEquivalents": {
"type": [
"null",
"number"
]
},
"energyJoules": {
"type": [
"null",
"number"
]
},
"energyMegatonsTnt": {
"type": [
"null",
"number"
]
},
"massKg": {
"type": [
"null",
"number"
]
},
"speedKmS": {
"type": [
"null",
"number"
]
}
},
"type": [
"null",
"object"
]
},
"notChecked": {
"items": {
"type": "string"
},
"type": [
"array",
"null"
]
},
"reasons": {
"items": {
"type": "string"
},
"type": [
"array",
"null"
]
},
"source": {
"type": [
"null",
"string"
]
},
"summary": {
"type": [
"null",
"string"
]
},
"verdict": {
"type": [
"null",
"string"
]
}
},
"type": "object"
},
"type": {
"type": "string"
}
},
"required": [
"type"
],
"type": "object"
}
},
"required": [
"input"
],
"type": "object"
}
}
},
"lastUpdated": "2026-11-02T04:04:48.148Z",
"quality": {
"l30DaysTotalCalls": 2,
"l30DaysUniquePayers": 1,
"lastCalledAt": "2026-11-02T04:04:47.86Z"
},
"resource": "https://space-objects.x402tookit.com/asteroid-size",
"serviceName": "Space Objects",
"tags": [
"asteroid",
"diameter",
"magnitude",
"impact",
"calculator"
],
"type": "http",
"x402Version": 2
},
"source": "x402_bazaar",
"summary": "Asteroid diameter from absolute magnitude H and albedo (or a dark-to-bright range), plus optional impact energy in megatons."
}What the leaf hashes
{"body":"ece35a9dc0c27cb22da0447f46bf3e4cc3b6f226aa751ca1bc16c95ccedf9249","id":2201365,"kind":"listing","method":"sync.x402_bazaar/1","observed_us":1793646804671456,"prev":null,"subject":"x402_bazaar:https://space-objects.x402tookit.com/asteroid-size","subject_kind":"source_record"}Proof
Fold these into the leaf in order, hashing each sorted pair with keccak256, to reach the root of (444186 rows).
- 0xff80db5fc0c49b42f2dca4ef69d45efa175a470302848dfaaedf6cec7edd305c
- 0x71cfb10b59093fff5cae3895f8eafec8c30fb01378fa4a5af40fb74f76763d10
- 0xd6d1d9dca1002d811ba8e6a3e4dadf89e70960865fe2d9f5063c7611030fcb02
- 0x124a4211f8ddd1d6a71ebe2369067d8c9f91e93759b81ba8a8fee9ce8b429198
- 0x59619232e4bd9801b7de5b5ed417abbf871e55d1c82d897e653ac1d06fd8ae3c
- 0xb43e4529d610967f47084e4fc38123f27d006ab889be52e0b094be8ea7fbf3b2
- 0x1052c222b119b83e6b4fdd9c5053517fa66eb0d3369301d0269e58e9fb4b0ee0
- 0xcc72c70abdb9e5ff858a38bc0d598a9cd65bde235bc6459c86fd1cb79430a750
- 0x231fcfe67dfc149e8b6f180d81d88c1a2f6bb062d04fa6d412e0f283daa30a7c
- 0x8b6fa2364389c42be2f747af97462c6acdd505184b917f4ae59f402a664afea3
- 0x9688b76af0c9bb74be0f03c4bfb74ceb45b869b97c383be6fcd136445cd9055d
- 0x45415c76d2ab204a9729a2a944991420a243f07964146403ea6d43181ac1ca44
- 0x25127db2e775737b2874f6a159f7c1bf984317eea6482e94589c3ef4c5ccab32
- 0xec5d643575d83c9e07e65deeef71943b53cbf3007e7e2b9a6ef414081509b0cc
- 0x252cce55f1a3d5391c16f82d7f62494429a5f69b03486d4cfcfb7b2c96d6c884
- Day root
- 0x78fecaabbe319e56f5c4b80fc02e2052e198ad24781da8832a475ff65f2002d1
- Chained
- 0xdc35957db5d1371ca382b9152878ffece28ec7c5cb4f98fd71ddb367f8b999b2
- Published
- On Arc Testnet, block 70432815: 0x56b814612eb2e3e544153df3e91e1f7199106d1e430c7d8c6b653feeb9ebe9af