International Space Station
Elevation rating: Moderate. A higher elevation generally means a better viewing opportunity.
WXSim: CLR-FAIR. Cloud cover is interpolated at the ISS peak time; local cloud positions may differ.
ISS times assume an unobstructed horizon. The cloud outlook is advisory, not a guarantee of visibility.
Path across the sky
Mon, Nov 9 · 6:42 PM EST
North is at the top; east is to the right. The center represents directly overhead (90°). The outer circle is the horizon (0°).
Upcoming visible passes
On smaller screens, swipe sideways within the table to see the Sky plot links.
| Date | Start | Direction | Max elev. | Duration | WXSim clouds | Outlook | Sky plot |
|---|---|---|---|---|---|---|---|
| Mon, Nov 9 | 6:42 PM | SSW → SSE | 25.4° | 1m 50s | 19% | Favorable | View path |
| Tue, Nov 10 | 5:55 PM | S → E | 17.6° | 3m 40s | — | Forecast unavailable | View path |
| Tue, Nov 10 | 7:31 PM | WSW → WSW | 17.9° | 1m 00s | — | Forecast unavailable | View path |
| Wed, Nov 11 | 6:43 PM | SW → NNW | 77.9° | 3m 20s | — | Forecast unavailable | View path |
| Thu, Nov 12 | 5:55 PM | SW → ENE | 56.6° | 5m 20s | — | Forecast unavailable | View path |
| Thu, Nov 12 | 7:33 PM | WNW → WNW | 13.9° | 0m 40s | — | Forecast unavailable | View path |
Code and Data Sources
This tracker uses Skyfield, an open-source Python astronomy library, and its SGP4 orbit-propagation dependency to predict ISS positions and illumination. The ISS orbital elements are provided by CelesTrak (standard GP/TLE and supplemental orbital elements). Local cloud-cover forecasts are generated by WXSim and supplied by HBurg-WX. Pass filtering, forecast integration, and this display were developed for HBurg-WX.
The viewing outlook is an estimate based on predicted cloud cover at the time of maximum ISS elevation; it does not account for the position of individual clouds or local obstructions. Skyfield and SGP4 are third-party open-source packages; WXSim is separate forecasting software.