Plans & limits
The Orbit Visualizer is free to use with no account required. A handful of power features are gated to ExoAtlas Pro — this page is the single source of truth for exactly what is free and what is not, with numbers that mirror app/modules/limits.js exactly.
Numbers are authoritative: the client-side limits shown here are enforced server-side for Pro features. This page and app/modules/limits.js are linked by comment so they stay in sync — if you ever see a discrepancy, let us know.
Free vs. Pro — full comparison
| Feature | Free | Pro |
|---|---|---|
| Ground sites | 1 site | 10 sites |
| Access (pass) span | Up to 48 hours | Up to 336 hours (14 days) |
| Maneuver nodes per object | 2 nodes | 50 nodes |
| Catalog group size | 12 objects per group | 200 objects per group |
| CSV ephemeris span | Up to 24 hours | Up to 336 hours (14 days) |
| CCSDS OEM 2.0 export | — | ✓ Included |
| CZML export | — | ✓ Included |
| Cloud scenarios | 0 (local browser only) | 50 cloud slots (up to 100 KB each) |
| SGP4/SDP4 propagation | ✓ Free, always | ✓ Free, always |
| J2 secular propagation | ✓ Free, always | ✓ Free, always |
| Two-body propagation | ✓ Free, always | ✓ Free, always |
| Ground tracks | ✓ Free, always | ✓ Free, always |
| CSV ephemeris (up to 24 h) | ✓ Free | ✓ Included |
| PNG capture (3D + ground track) | ✓ Free, always | ✓ Free, always |
| Copy Link / permalink sharing | ✓ Free, always | ✓ Free, always |
| Local scenario save/load | ✓ Free, always | ✓ Free, always |
What stays free, always
These capabilities are free with no account, and will remain so:
- All three propagators — SGP4/SDP4, J2 secular, and two-body.
- Ground tracks and the full Ground Track tab.
- Copy Link (permalink v2 scenario sharing) and v1 deep links.
- Local save/load (browser storage, unlimited slots).
- Access passes up to 48 hours.
- CSV export up to 24 hours.
- PNG capture of the 3D view and the ground-track map.
- Maneuver planning with up to 2 nodes per object.
- Conjunction screening (no span limits gated).
- Catalog singles — individual satellites load without caps.
Who Pro is for
ExoAtlas Pro is designed for people who push past quick geometry into real-world operations and analysis:
- Satellite operators and ground station teams — 14-day access spans, 10 sites, 50 maneuver nodes per object, and cloud-saved scenarios you can revisit from any machine.
- Mission analysts — CCSDS OEM 2.0 and CZML export lets you feed ephemeris directly into other tools (STK, GMAT, Cesium) without re-entry.
- CubeSat teams — full constellation groups (up to 200 objects) for coverage analysis, multi-site access screening, and OEM handoff.
- Educators with classes — cloud scenarios let students share a starter scenario, and full group loads let you present a live constellation without the free-tier cap.
Cloud scenario detail
Cloud scenarios are hard-enforced server-side by /api/scenarios. The limits are:
- 50 slots per Pro user (MAX_ROWS = 50 in the API)
- 100 KB per scenario body (MAX_BODY_BYTES = 100 × 1024 bytes)
- 120 character name limit (MAX_NAME_LEN = 120)
- Requires authentication; anonymous requests are rejected with HTTP 401.
- Free-plan users who attempt to save receive HTTP 402 and a clear message.
Pricing
For current pricing, trial terms, and billing details, see the pricing page.