Uses da/dt = -rho×sqrt(mu×a)/ballistic_coefficient for a circular orbit, holds d
Uses da/dt = -rho×sqrt(mu×a)/ballistic_coefficient for a circular orbit, holds density and ballistic coefficient constant, and linearly projects altitude over a bounded horizon. Real density changes rapidly with altitude and solar activity; the result is not a lifetime prediction or maneuver plan.
Answeringour last check, 2026-09-24
1 of 1checks answered this week
872 msmedian answer time
$0.004listed price per call
$0.004price it asked us
Paid test badge: not yet. The checks above are free: we call the tool without paying and read the payment request it sends back. The Verified badge needs paid calls whose answers match the promised output, and nobody can buy a badge.
Endpoint
POST https://space.halowerk.com/v1/orbit-decay
| Category | Everything else |
|---|---|
| Provider host | space.halowerk.com |
| Networks | eip155:8453 |
| Payment schemes | exact |
| Self-reported calls, 30 days | 2 from 2 payers (the provider's figure, not ours) |
Our checks, last 30 days
| Day | Result | HTTP | Asked | Time |
|---|---|---|---|---|
| 2026-09-24 | valid payment request | 402 | $0.004 | 872 ms |
Example input (from the provider)
{
"body": {
"altitude_km": 410,
"atmospheric_density_kg_m3": 4e-12,
"ballistic_coefficient_kg_m2": 120,
"horizon_days": 30,
"minimum_altitude_km": 180
},
"bodyType": "json",
"method": "POST",
"type": "http"
}
Promised output schema (from the provider)
{
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
"body": {
"additionalProperties": false,
"properties": {
"altitude_km": {
"maximum": 2000,
"minimum": 100,
"type": "number"
},
"atmospheric_density_kg_m3": {
"description": "Caller-supplied density at the modeled altitude.",
"maximum": 1,
"minimum": 0,
"type": "number"
},
"ballistic_coefficient_kg_m2": {
"description": "Mass divided by drag coefficient and reference area.",
"maximum": 1000000000,
"minimum": 1e-06,
"type": "number"
},
"horizon_days": {
"maximum": 36500,
"minimum": 0,
"type": "number"
},
"minimum_altitude_km": {
"maximum": 2000,
"minimum": 0,
"type": "number"
}
},
"required": [
"altitude_km",
"ballistic_coefficient_kg_m2",
"atmospheric_density_kg_m3",
"horizon_days",
"minimum_altitude_km"
],
"type": "object"
},
"bodyType": {
"enum": [
"json",
"form-data",
"text"
],
"type": "string"
},
"method": {
"enum": [
"POST",
"PUT",
"PATCH"
],
"type": "string"
},
"type": {
"const": "http",
"type": "string"
}
},
"required": [
"type",
"method",
"bodyType",
"body"
],
"type": "object"
}
},
"required": [
"input"
],
"type": "object"
}