When most people think of the Hubble Space Telescope, they picture its stunning images of distant galaxies, glowing nebulae, and the deep reaches of the cosmos. What many don't realize is that you can actually see the Hubble Space Telescope with your own eyes as it passes overhead. No telescope required.
Hubble orbits Earth at roughly 540 kilometers altitude, cataloged under NORAD ID 20580. Its large solar panels and reflective body catch sunlight and create a visible point of light that moves steadily across the sky. While it's not as dramatically bright as the International Space Station, Hubble is absolutely visible from the ground under the right conditions. This guide will walk you through everything you need to know to spot it.
About the Hubble Space Telescope
The Hubble Space Telescope was launched on April 24, 1990, aboard the Space Shuttle Discovery during mission STS-31. Over three decades later, it remains one of the most productive scientific instruments ever built, continuing to deliver groundbreaking observations of the universe.
Hubble orbits at an altitude of approximately 540 km, which is quite a bit higher than the International Space Station's orbit of around 420 km. This higher orbit has important implications for visibility that we'll cover below. The telescope itself is about the size of a large school bus (13.2 meters long and 4.2 meters in diameter) with two large solar arrays extending from either side. Those solar panels are one of the key reasons Hubble is visible: they present a large, reflective surface that catches sunlight.
One critical detail for observers is Hubble's orbital inclination of 28.5 degrees. This means Hubble's ground track only extends to 28.5 degrees north and south of the equator. While it can still be spotted from higher latitudes due to the viewing geometry (up to roughly 50 degrees north or south), it is best observed from tropical and subtropical regions. If you live in Miami, Houston, Cairo, New Delhi, or Sydney, you're in an excellent position. Observers in London, Seattle, or Moscow will have a much harder time.
Hubble is tracked under NORAD catalog number 20580, which you can use to look up its orbital elements and predict passes from any tracking tool.
Can You Really See Hubble with the Naked Eye?
Yes, you absolutely can. Hubble's large solar panels and its polished exterior reflect sunlight effectively enough to make it visible to the unaided eye under good conditions. It appears as a steady, moderately bright point of light moving smoothly across the sky, similar in appearance to other satellites but typically a bit brighter than average.
Hubble is not as bright as the ISS, though. The International Space Station has a much larger surface area (its solar arrays span over 100 meters), which makes it appear brilliantly bright, sometimes rivaling Venus. Hubble is more subtle. On a good pass, it's clearly visible as a moderately bright star-like object, but it won't dominate the sky the way the ISS does.
For the best experience, you'll want reasonably dark skies. While the ISS can be spotted from brightly lit city centers, Hubble benefits from darker conditions. Suburban skies will work for bright passes, but dimmer passes may require you to get away from heavy light pollution.
Hubble is dimmer than the ISS, so you'll want darker skies for the best view. Suburban areas work, but rural locations are ideal.
How Bright Is Hubble Compared to Other Satellites?
Apparent brightness in astronomy is measured in magnitude, where lower numbers mean brighter objects. Negative numbers are the brightest. Here's how Hubble compares to other common objects in the night sky:
- International Space Station (ISS): Typically magnitude -2 to -4, sometimes as bright as -5. By far the brightest satellite. Unmistakable.
- Hubble Space Telescope: Typically magnitude +1 to +2. Similar to a bright star like Polaris or the stars of the Big Dipper. Clearly visible in dark skies.
- Typical small satellite: Magnitude +3 to +4. Requires dark skies to see at all.
- Venus (for reference): About magnitude -4. The brightest object in the night sky after the Moon.
Hubble's brightness varies depending on the geometry of the pass. During a high-elevation pass, when Hubble passes nearly overhead, it is closest to you and most fully illuminated by the Sun, making it brightest. Low-elevation passes, where Hubble skims along the horizon, will appear dimmer because the telescope is farther away and may be only partially illuminated.
One interesting consequence of Hubble's higher orbit is that its passes tend to be longer and slower than the ISS. Because it's farther from Earth, Hubble moves more slowly across the sky and its passes can last anywhere from three to six minutes. It also appears to move a bit more gracefully, with a smoother, steadier track compared to the relatively quick pace of the ISS.
When and Where to Look
Like all satellites, Hubble is only visible during twilight windows, the period shortly after sunset or shortly before sunrise when the sky is dark at ground level but the satellite, high above, is still illuminated by the Sun. These windows typically extend from about 20 minutes to roughly 2 hours after sunset (or before sunrise), depending on the time of year and your latitude.
Hubble's higher orbit gives it a slight advantage here. Because it sits at 540 km rather than the ISS's 420 km, Hubble remains in sunlight a bit longer after sunset and catches sunlight a bit earlier before sunrise. This means the visibility windows can be slightly wider than for lower-orbit satellites, and Hubble may be visible a few minutes later into the evening or earlier in the morning.
The most important factor, however, is latitude. Hubble's 28.5-degree inclination means its ground track never goes farther north or south than 28.5 degrees from the equator. Observers at higher latitudes can still see it because the viewing angle extends beyond the ground track, but the passes will be low on the horizon and therefore dimmer and shorter. For the best, highest, brightest passes, you want to be within the tropical zone.
Seasonal patterns also matter. During summer months, twilight lasts longer and the Sun doesn't dip as far below the horizon, which can extend your satellite-viewing window. Conversely, in winter at mid-latitudes, the windows are shorter but the skies tend to be clearer.
The only reliable way to know exactly when Hubble will pass over your location is to use a pass prediction tool. These calculate the telescope's orbit and your position on Earth to give you the precise time, direction, and elevation of each pass.
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Step-by-Step: Spotting Hubble
Once you have a predicted pass for your location, follow these steps to maximize your chances of a successful sighting:
- Get pass predictions for your location. Use one of the tools listed below to find the next visible Hubble pass. Note the time, the direction it will appear from (e.g., southwest), the maximum elevation above the horizon, and the direction it will disappear toward.
- Find a spot with a clear view toward the south (for northern hemisphere observers). Since Hubble's orbit stays close to the equator, it will generally appear in the southern part of the sky if you're north of 28.5 degrees. Southern hemisphere observers should look northward. If you're in the tropics, Hubble can pass directly overhead.
- Arrive 5 minutes early and let your eyes adjust. Even a few minutes of dark adaptation will improve your ability to see dimmer objects. Avoid looking at your phone screen. If you must check the time, use a red-light mode or cover the screen.
- Look for a steady, moderately bright light moving smoothly across the sky. Hubble will not blink or flash like an airplane. It moves in a smooth, continuous arc. At magnitude +1 to +2, it will be comparable to a moderately bright star, but unmistakably in motion.
- Track it across the sky. A typical Hubble pass lasts 3 to 6 minutes, longer than most satellite passes. Follow it from the direction it appears to where it fades. It may gradually dim as it enters Earth's shadow.
- Use binoculars for dimmer passes. If the predicted magnitude is +2 or fainter, a pair of ordinary binoculars (7x50 or 10x50) will make Hubble much easier to spot. Binoculars also help you pick it up earlier and follow it more easily in light-polluted skies.
Unlike the ISS, Hubble's orbit takes it over a narrower band of the Earth. If you live above 50 degrees north latitude, Hubble passes will be very low on the horizon and harder to see.
Best Tools for Tracking Hubble
Several tools can generate pass predictions for Hubble using its NORAD ID (20580). Here are the most reliable options:
Heavens-Above
Heavens-Above is one of the oldest and most trusted satellite tracking websites. Set your location, then search for satellite number 20580 to get a full list of upcoming Hubble passes with times, directions, and brightness predictions. The site also provides sky charts showing exactly where to look.
N2YO.com
N2YO provides real-time tracking of Hubble on a world map, along with pass predictions for your location. Enter NORAD ID 20580, and you can see where Hubble is right now, its altitude, speed, and upcoming passes visible from your area. N2YO is particularly good for quickly checking whether Hubble is in sunlight at any given moment.
Skytrail (Launching 2026)
Skytrail includes Hubble (NORAD 20580) in its default satellite catalog with automatic pass predictions, push notifications, and augmented reality guidance. Point your phone at the sky and Skytrail shows you exactly where to look in real time. If you've ever struggled to figure out "which direction is west-southwest at 35 degrees elevation," AR mode solves that instantly.
For a full comparison of all available options, see our guide to the best satellite tracking apps in 2026.
Frequently Asked Questions
Is Hubble visible from everywhere?
No. Hubble's orbital inclination of 28.5 degrees means its ground track stays within 28.5 degrees of the equator. However, the viewing geometry extends visibility to roughly 50 degrees north and south latitude. Observers in the tropics and subtropics (places like Florida, Hawaii, Mexico, India, northern Australia, and the Mediterranean) get the best and highest passes. From higher latitudes like the northern United States, the UK, or Scandinavia, Hubble passes will be very low on the southern horizon if visible at all.
Can I photograph the Hubble Space Telescope?
Yes. The simplest method is to mount a DSLR or mirrorless camera on a tripod, use a wide-angle lens, and take a long exposure of 15 to 30 seconds during a Hubble pass. Hubble will appear as a bright streak against the star field. Use a low ISO (400-800) and a wide aperture (f/2.8 to f/4) for best results. More advanced amateur astronomers have actually resolved Hubble's shape, including its solar panels, using large telescopes (10 inches or more) with video tracking, though this requires considerable skill and equipment.
Is Hubble still in orbit?
Yes. As of 2026, the Hubble Space Telescope is still fully operational and continues to conduct scientific observations. Its orbit is slowly decaying due to atmospheric drag. It has dropped from its original altitude of about 600 km to roughly 540 km. NASA is evaluating options for its future, including the possibility of a commercial mission to reboost Hubble to a higher orbit, which would extend both its operational lifetime and its time in orbit before eventual reentry. For now, Hubble remains one of the most productive observatories in history and a rewarding target for satellite watchers.
Hubble is one of those rare objects that bridges the gap between professional astronomy and backyard stargazing. It has shaped our understanding of the universe in ways that few instruments ever have, and it's remarkable that you can step outside, look up, and watch it sail overhead. Catching a Hubble pass is a satisfying experience no matter how many satellites you have tracked before. Check your pass predictions, find a clear sky, and give it a try.