Chandra X-ray Observatory over St. Louis tonight
Pass predictions for St. Louis, MO.
Next visible pass
Wed, Sep 9, 5:51 PM
Peak elevation 84.24° · rises E · sets NW
Tracking: CXO (NORAD 25867)
7-day pass forecast
| Date | Time | Peak elev | Rises | Sets |
|---|---|---|---|---|
| Sep 9 | 5:51 PM | 84.24° | E | NW |
| Sep 11 | 8:18 AM | 80.97° | NE | NW |
| Sep 12 | 1:05 PM | 72.82° | NE | W |
| Sep 13 | 10:58 AM | 66.16° | SW | NW |
| Sep 14 | 10:27 AM | 88.49° | NE | NW |
| Sep 15 | 2:30 PM | 46.33° | E | S |
How to spot Chandra X-ray Observatory from St. Louis
NASA's flagship X-ray space telescope.
- Look in the direction listed — passes start near the horizon and arc across the sky.
- Peak elevation matters — a 60°+ peak means it'll go nearly overhead; under 30° stays low.
- Best viewing is in the 90 minutes after sunset or before sunrise — the satellite is sunlit while you're in shadow.
- No equipment needed for bright passes — the ISS at peak rivals Venus.
Going to look up?
For fainter satellites you'll want 7×50 or 10×50 binoculars. A pair of Celestron SkyMaster binoculars is the consensus pick. Affiliate placement — replace with your affiliate link.
Pass alerts on your phone
Browser push, no email needed. We'll notify you 30 minutes before Chandra X-ray Observatory is visible from St. Louis.
Prefer email?
One email tonight before Chandra X-ray Observatory is visible, never more than 2/week.