Use your Smartphone to enjoy a guided tour of the night sky

StarSense recognition technology analyzes the pattern of stars in the sky and calculates their position in real time

The StarSense app provides a list of visible objects

The manual altazimuth mount makes it easy to locate objects that appear on the screen, direct the telescope in the direction indicated by the arrows on the screen. When the target turns green, it is ready to be seen in the telescope's eyepiece.

102mm (4 ”) Refractor with High Transmission XLT Optical Coatings

Includes 25mm and 10mm eyepieces, StarSense smartphone dock, vertical image diagonal, a red dot finder, and a sturdy full-height tripod.

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All about the Celestron STARSENSE EXPLORER ™ DX 102AZ telescope

Celestron has reinvented the handheld telescope with StarSense Explorer, the first telescope to use your smartphone to analyze the night sky and calculate its position in real time. StarSense Explorer is ideal for beginners thanks to the easy-to-use interface and detailed tutorials in the application. It's like having your own personal night sky tour guide.

Dock, launch, explore

Leave behind complicated star maps, imprecise planetarium applications, and computerized mounts. With StarSense Explorer, locating objects has never been easier, faster or more accurate. Within minutes of setting up the telescope, you will be navigating the sky with confidence. Simply place your phone on the exclusive StarSense base and launch the StarSense Explorer app. After aligning your phone with the telescope's optics (a quick 2-minute procedure), StarSense Explorer generates a list of currently visible celestial objects. Make your selection and arrows appear on the screen, guiding you as you move the telescope. When the object is ready to be seen, the target turns green.

Smartphone compatibility

StarSense Explorer works with most modern smartphones, including iPhone 6 and higher and most devices with Android 7.1.2 or later manufactured since 2016.

Patent pending StarSense sky recognition technology

StarSense Explorer uses patent pending technology and your smartphone to determine exactly where the telescope is pointing in the night sky. A Lost in Space (LISA) algorithm, such as those used by orbiting satellites to properly reorient itself, helps the application match the star patterns it detects in its internal database.

While other astronomy apps may claim they can help you find objects, they rely solely on the phone's gyros and accelerometers, which are not as accurate as LISA technology. No other app can accurately tell you when your target is visible in the eyepiece.

High quality altazimuth mount with slow motion control

An ultra-stable altazimuth mount provides a solid foundation for the StarSense Explorer DX. Slip clutches and geared slow-motion controls on both axes help you move the telescope smoothly and zero on your target. When celestial objects appear to move across the night sky, you can follow them just by turning the buttons. Everything is anchored by a full height adjustable tripod.

Dazzling views with high-quality optics

With a large 102mm (4 ”) objective lens, this telescope has enough light gathering capabilities to bring out impressive details in celestial objects. You can expect crisp, bright views of Jupiter's four Galilean moons, their cloud bands and the Great Red Spot, the rings of Saturn, the trapezoid in the Orion Nebula, and the beautiful Pleaides Open Star Cluster. Celestron's XLT Optical Coatings enhance light transmission, further enhancing views. The telescope also includes a 90-degree vertical image diagonal, so you can use it during the day to view birds, wildlife, landscapes, and more.

Perfect for the city or dark sky sites

Even if you live in a city with light pollution, StarSense Explorer is advanced enough to be able to identify Jupiter, Saturn, Venus, the Orion Nebula, double stars and some of the most famous celestial objects.

But if you can move the telescope to a slightly darker place, more objects will show up. With this 4 ”refractor and relatively dark skies, the Andromeda Galaxy, the Hercules Open Star Cluster and many more are easily within reach.

The complete telescope kit weighs just 14.2 pounds, making it perfectly portable and easy to take along on your next camping trip or remote viewing site.

Everything you need to observe immediately

When you unpack your new StarSense Explorer DX, you will find:

102mm Refractor Optical Tube

StarSense base for your smartphone

Low power (25mm) and high power (10mm) eyepiece

90 degree erect image diagonal

StarPointer red dot finder, perfect for using the telescope during the day or without the StarSense Explorer app

Altazimuth mount with slow motion controls

Full height tripod with accessory tray to keep you organized


Optical Design Refractor

Aperture 102mm (4.01")

Focal Length 660mm (25.98")

Focal Ratio f/6.5

Focal Length of Eyepiece 1 25mm (0.98")

Magnification of Eyepiece 1 26x

Focal Length of Eyepiece 2 10mm (0.39")

Magnification of Eyepiece 2 66x

Barlow Lens None

Finderscope StarPointer™ red dot finderscope

Star Diagonal Erect image 90° (1.25")

Optical Tube Aluminum

Highest Useful Magnification 240x

Lowest Useful Magnification 15x

Limiting Stellar Magnitude 12.5

Resolution (Rayleigh) 1.37 arc seconds

Resolution (Dawes) 1.14 arc seconds

Light Gathering Power (Compared to human eye) 212x

Optical Coatings Fully XLT Coated glass optics

Optical Tube Length 812.8mm (32")

Optical Tube Diameter 118mm (4.64")

Optical Tube Weight 5 lbs (2.26 kg)

Dovetail CG-5 Dovetail Bar


Mount Type Manual Alt-Azimuth

Height adjustment range (includes mount and tripod) Aluminum, 1244.6mm (49") max height

Tripod Leg Diameter N/A

Accessory Tray Yes

Tripod Weight 9.2 lbs (4.17 kg)

Slew Speeds Manual

GPS Uses phone's GPS

Dovetail Compatibility CG-5 Dovetail bar

Power Requirements None (Recommend PowerTank Glow to keep phone charged while using app)

Alignment Procedures Use StarSense Explorer app

Software StarSense Explorer app | SkyPortal app | Celestron Starry Night Basic Edition Software

Total Kit Weight 14.2 lbs (6.44 kg)

Included Items Telescope tube | Mount/tripod (preassembled) | 25mm & 10mm eyepieces | Erect image diagonal | StarPointer finderscope | Accessory tray | StarSense Explorer phone dock

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