Orbital period from semi-major axis via Kepler's third law, with perihelion, aph...
https://space-objects.x402tookit.com/orbital-periodOverview
Orbital period from semi-major axis via Kepler's third law, with perihelion, aphelion and speeds when eccentricity is given.
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)
695ms
Uptime (30d)
87.5%
Reliability Score
83.8/100
Last Checked
2026-10-28 06:43:18
Last Healthy
2026-10-28 06:43:18
Consecutive Failures
0
x402 Payment Validation
Payment Requirements
Valid
Asset Verified
Known USDC
Facilitator
—
Input Schema
{
"method": "GET",
"queryParams": {
"eccentricity": 0.223,
"semiMajorAxisAu": 1.458
},
"type": "http"
}
Output Schema
{
"example": {
"aphelionAu": 1.7831,
"asOf": "2026-10-11T08:41:44.646Z",
"centralMassSolar": 1,
"degraded": false,
"disclaimer": "Screening signal computed from the named public source. Not financial, legal or investment advice; provided as is. Verify at the source before acting.",
"eccentricity": 0.223,
"formula": "T(years)^2 = a(au)^3 / M(solar masses); year = 365.25 days",
"meanDistanceNote": "Speeds use the vis-viva equation.",
"meanMotionDegPerDay": 0.55986,
"notChecked": [
"perturbations by planets (real periods drift slightly)",
"the mass of the orbiting body, which is negligible for asteroids and comets",
"…1 more"
],
"perihelionAu": 1.1329,
"periodDays": 643.023,
"periodYears": 1.7605,
"reasons": [
"Kepler's third law with a Julian year of 365.25 days; accurate to better than 0.1% for solar orbits."
],
"semiMajorAxisAu": 1.458,
"source": "computed locally",
"speedAtAphelionKmS": 19.66,
"speedAtPerihelionKmS": 30.95,
"summary": "Semi-major axis 1.458 au gives an orbital period of 1.761 years (643 days). Perihelion 1.133 au (30.9 km/s), aphelion 1.783 au (19.7 km/s).",
"verdict": "COMPUTED"
},
"type": "json"
}