Chandra X-ray Observatory over Philadelphia tonight
Pass predictions for Philadelphia, PA.
Next visible pass
Sat, Oct 24, 10:42 PM
Peak elevation 18.28° · rises NW · sets NW
Tracking: CXO (NORAD 25867)
7-day pass forecast
| Date | Time | Peak elev | Rises | Sets |
|---|---|---|---|---|
| Oct 24 | 10:42 PM | 18.28° | NW | NW |
| Oct 26 | 3:06 AM | 78.95° | NE | NW |
| Oct 27 | 9:29 AM | 76.57° | NE | W |
| Oct 28 | 11:39 AM | 33.37° | W | NW |
| Oct 29 | 6:28 AM | 86.55° | NE | NW |
| Oct 30 | 10:43 AM | 58.34° | E | SW |
How to spot Chandra X-ray Observatory from Philadelphia
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 Philadelphia.
Prefer email?
One email tonight before Chandra X-ray Observatory is visible, never more than 2/week.