Planet Observing

Best Telescope to See Pluto: Is It Even Possible?

Can you see Pluto with a telescope? Learn how faint it is, the aperture and dark skies you need, how to find and confirm it, and what not to expect.

On this page
  1. Short answer
  2. How faint is Pluto?
  3. What telescope do you need?
  4. How to find and confirm Pluto
  5. Which telescopes are best for planets in general?
  6. What not to expect
  7. Common questions

Short answer

Yes, it is possible to see Pluto with a telescope, but it is a hard, advanced target. Pluto appears only as a faint star-like point of light, never as a disc, and you need a fairly large amateur telescope, dark skies, and a good finder chart to pick it out among the surrounding stars.

How faint is Pluto?

Pluto is roughly magnitude 14 to 15, far fainter than the stars visible to the naked eye (about magnitude 6 under dark skies). It is also very small and very far away, so no home telescope will show surface features. It is a dwarf planet, not one of the eight planets, and much harder than the targets in our guide to seeing planets with a telescope.

What telescope do you need?

Observers commonly suggest an aperture of at least about 8 inches (200mm) under very dark skies, with 10 to 12 inches or more as a more comfortable choice. Smaller telescopes might in principle reach it in excellent conditions, but it is difficult. Dark skies matter as much as aperture: light pollution washes out faint stars, and Pluto looks like just another faint star. Its position changes over the years, and from northern latitudes it is often low in the sky, which makes it harder, so check where it is currently.

A Dobsonian reflector is a common budget choice for large aperture (see the best Dobsonian telescopes). GoTo or push-to systems (see the best GoTo telescopes) can help you navigate to the right field.

How to find and confirm Pluto

  1. Use planetarium software to find Pluto’s position for your date, and print a detailed finder chart showing stars to about magnitude 15 or fainter.
  2. Star-hop to the right field with a low-power eyepiece, then increase magnification.
  3. Compare the star pattern in the eyepiece to your chart and note the faint “star” you cannot match to it.
  4. Confirm by returning a night or several nights later. Pluto moves slowly against the background stars, so the point that has shifted is the dwarf planet. Sketching the field on two nights helps.

Which telescopes are best for planets in general?

Telescopes with large aperture, good optics and enough focal length are favored for planets. Maksutov-Cassegrains and refractors give sharp, high-contrast views, and Schmidt-Cassegrains are compact and popular (pros and cons). Those recommendations apply to the bright planets; for Pluto, light-gathering aperture matters most, so a big Dobsonian can beat a premium small refractor. If you want easier targets first, try Jupiter and its moons.

What not to expect

  • No disc or color, just a faint dot.
  • No detail like the images from NASA’s New Horizons flyby in 2015.
  • It is not a good first target; try Saturn first.

Common questions

Can you see Pluto with a telescope? Yes, with a large amateur telescope, dark sky and a detailed chart, though it only looks like a faint star.

What did the James Webb telescope see on Pluto? JWST has observed Pluto and its moon Charon, but those are professional space-telescope observations, not something possible at home.

Can I see the Andromeda galaxy with a telescope? Yes, it is much easier; it is visible in binoculars from dark sites (see the easiest galaxy to see).

The complete guide to planet observing

Seeing Planets With a Telescope
Read the guide

Keep exploring

Guides from other topics

All topics →