Chandra X-ray Observatory over Philadelphia tonight
Pass predictions for Philadelphia, PA.
Next visible pass
Wed, Jun 10, 3:08 PM
Peak elevation 79.60° · rises NE · sets NW
Tracking: CXO (NORAD 25867)
7-day pass forecast
| Date | Time | Peak elev | Rises | Sets |
|---|---|---|---|---|
| Jun 10 | 3:08 PM | 79.60° | NE | NW |
| Jun 11 | 6:30 PM | 78.74° | NE | W |
| Jun 13 | 12:34 AM | 18.44° | NW | NW |
| Jun 13 | 3:39 PM | 86.79° | NE | NW |
| Jun 14 | 7:31 PM | 65.66° | NE | W |
| Jun 15 | 1:50 PM | 72.30° | S | NW |
| Jun 16 | 5:06 PM | 86.08° | NE | NW |
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.