Asteroid diameter from absolute magnitude H and albedo (or a dark-to-bright rang...
https://space-objects.x402tookit.com/asteroid-sizeOverview
Asteroid diameter from absolute magnitude H and albedo (or a dark-to-bright range), plus optional impact energy in megatons.
Protocol
x402
Price
$0.02
Payment Asset
USD Coin
Payment Network
eip155:8453
Category
uncategorized
Provider
Space Objects
Source
bazaar
Indexed
2026-10-20 22:22:41
Health
Status
healthy
Latency (p50)
599ms
Uptime (30d)
93.3%
Reliability Score
86.7/100
Last Checked
2026-10-28 06:41:30
Last Healthy
2026-10-28 06:41:30
Consecutive Failures
0
x402 Payment Validation
Payment Requirements
Valid
Asset Verified
Known USDC
Facilitator
—
Input Schema
{
"method": "GET",
"queryParams": {
"H": 19.09,
"albedo": 0.35,
"velocityKmS": 20
},
"type": "http"
}
Output Schema
{
"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"
}