# Space Objects – JPL Sentry Impact Risk Lookup

> Space Objects – JPL Sentry Impact Risk Lookup is a paid API for AI agents from space-objects.x402tookit.com, paid per call via x402, $0.02/call, status unknown (last checked 2026-10-21).

Checks whether a specific asteroid is on the JPL Sentry impact-risk list and returns its impact probability, Palermo scale, Torino scale, size, and likeliest impact dates.

## Facts

- Endpoint: GET https://space-objects.x402tookit.com/impact-risk-object?utm_source=zero.xyz
- Price: $0.02/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-21
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/space-objects-jpl-sentry-impact-risk-lookup-2d3b9722
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_put31LI2-3gSJfvb6kLlR

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability space-objects-jpl-sentry-impact-risk-lookup-2d3b9722
```

Example prompt: Is asteroid 101955 Bennu on the JPL Sentry impact-risk list, and if so what's its impact probability, Palermo scale rating, and the likeliest impact dates?

## When to prefer this

Use this endpoint when you need authoritative JPL Sentry impact-risk data for a specific asteroid by designation or number, including Palermo and Torino scale ratings, impact probability, size, and likeliest impact dates. Prefer this over general asteroid lookup endpoints when impact-risk assessment is the primary goal. For general orbital data, close-approach history, or size estimation, use the sibling endpoints on the same service.

## Known failure modes

- Asteroid designation not found on JPL Sentry (returns null fields or empty result — asteroid may simply not be on the risk list)
- Invalid or malformed designation string causes a 400-level error
- JPL Sentry data source temporarily unavailable causing a degraded or stale response
- Very recently discovered objects may not yet appear in Sentry's database
- Ambiguous designations (e.g. short names matching multiple objects) may return incorrect or no data

## How this service works

Is this asteroid on the JPL Sentry impact-risk list? Probability, Palermo and Torino levels, size and likeliest impact dates.

## Output

Returns a structured record including: whether the asteroid appears on JPL Sentry, cumulative impact probability (oneIn odds and decimal), maximum Palermo scale value and band, maximum Torino scale level, estimated diameter in km, mass in kg, impact energy in megatons, impact speed in km/s, number of potential impact solutions, likeliest impact dates with individual probabilities and Palermo values, data arc length, observation count, last observation date, orbit solution date, Sentry last-updated timestamp, source URL, a human-readable summary and verdict, and any degraded-data flags or disclaimers.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "required": [
      "designation"
     ],
     "properties": {
      "designation": {
       "type": "string",
       "description": "Number or designation, for example 101955 or 29075"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object",
     "properties": {
      "asOf": {
       "type": [
        "null",
        "string"
       ]
      },
      "name": {
       "type": [
        "null",
        "string"
       ]
      },
      "oneIn": {
       "type": [
        "null",
        "number"
       ]
      },
      "massKg": {
       "type": [
        "null",
        "number"
       ]
      },
      "source": {
       "type": [
        "null",
        "string"
       ]
      },
      "reasons": {
       "type": [
        "array",
        "null"
       ],
       "items": {
        "type": "string"
       }
      },
      "summary": {
       "type": [
        "null",
        "string"
       ]
      },
      "verdict": {
       "type": [
        "null",
        "string"
       ]
      },
      "degraded": {
       "type": [
        "boolean",
        "null"
       ]
      },
      "sourceUrl": {
       "type": [
        "null",
        "string"
       ]
      },
      "torinoMax": {},
      "diameterKm": {
       "type": [
        "null",
        "number"
       ]
      },
      "disclaimer": {
       "type": [
        "null",
        "string"
       ]
      },
      "notChecked": {
       "type": [
        "array",
        "null"
       ],
       "items": {
        "type": "string"
       }
      },
      "palermoMax": {
       "type": [
        "null",
        "number"
       ]
      },
      "dataArcDays": {
       "type": [
        "null",
        "number"
       ]
      },
      "designation": {
       "type": [
        "null",
        "string"
       ]
      },
      "palermoBand": {
       "type": [
        "null",
        "string"
       ]
      },
      "obse
… (truncated)
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/space-objects-jpl-sentry-impact-risk-lookup-2d3b9722/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from space-objects.x402tookit.com](https://www.zero.xyz/host/space-objects.x402tookit.com/llms.txt)