StarSense Explorer is the reinvention of manual telescopes with the ability to analyse night sky and calculate its position by using smartphones. Celestron StarSense Explorer LT 127mm AZ Reflector Telescope is a perfect choice for beginner astronomers who are looking for an easy to use and user- friendly telescope with detailed tutorials.

Dock, Launch, Explore

The ability to connect your smartphone and using the StarSense Explorer app allow you to navigate the sky easily without worrying about complicated star charts or imprecise planetarium apps.

StarSense Explorer app provides you with a list of celestial objects currently visible in the sky by simply placing your phone in the StarSense dock and launching the StarSense Explorer app.

Solid Altazimuth Mount and Adjustable Tripod

StarSense Explorer LT 127mm AZ Reflector features a sturdy altazimuth mount which allows you to fine-tune the telescope’s pointing position. With its full-height adjustable tripod, you can easily follow targets across the sky by sliding the rod and smoothly adjust the altitude.

Dazzling Views with High-Quality Optics

The telescope employs a large 127mm objective lens which gathers enough light to deliver sharp and detailed images of celestial objects. With its high-quality objective lens, you can easily observe bright views of Jupiter’s four Galilean moons, its cloud bands and Great Red Spot, the rings of Saturn, the trapezium in the Orion Nebula, and beautiful Pleiades Open Star Cluster.

Perfect for the City or Dark Sky Sites

The StarSense Explorer advance technology delivers an outstanding image quality even in light-polluted locations. With this 5” Newtonian telescope you can easily observe the most famous celestial objects like Jupiter, Saturn, Venus, the Orion Nebula or Double stars. Even in relatively dark skies, the Andromeda Galaxy or Hercules Open Star Cluster is easily visible.

Lightweight and Easy to Transport

The entire telescope kit weighs only 5.17kg, so it’s perfectly portable and easy to bring on your next camping trip or to a remote observing site.

Advance StarSense Sky Recognition Technology

The StarSense Explorer’s patent-pending technology determines exactly where the telescope is pointed in the night sky. A Lost in Space Algorithm (LISA) helps the app match star patterns it detects overhead to its internal database similar to the algorithm satellites use to correctly reorient themselves in orbit.

Page BreakSmartphone Compatibility

StarSense Explorer is compatible with most modern smartphones, including iPhone 6 and up and most devices running Android 7.1.2 or later manufactured since 2016. For a complete compatibility list, click here .
  • 127mm Newtonian reflector optical tube
  • StarSense dock for your smartphone
  • Low powered (25mm) and high powered (10mm) eyepiece
  • Barlow lens to double the power of each eyepiece
  • Easy to use during the day or without the StarSense Explorer app
  • Altazimuth mount with slow motion control rod
  • Full-height tripod with an accessory tray



Optical Design:

Newtonian Reflector



Focal Length:


Focal Ratio:


Focal Length of Eyepiece 1:


Magnification of Eyepiece 1:


Focal Length of Eyepiece 2:


Magnification of Eyepiece 2:


Barlow Lens:

2x (1.25")


StarPointer™ red dot finderscope

Optical Tube:


Highest Useful Magnification:


Lowest Useful Magnification:


Limiting Stellar Magnitude:


Resolution (Rayleigh):

1.1 arc seconds

Resolution (Dawes):

.91 arc seconds

Light Gathering Power (Compared to human eye):


Secondary Mirror Obstruction:


Secondary Mirror Obstruction by Diameter:


Secondary Mirror Obstruction by Area:


Optical Coatings:

Glass mirrors coated with aluminium and SiO2

Optical Tube Length:


Optical Tube Diameter:


Optical Tube Weight:

3.44 kg





Mount Type:

Manual Alt-Azimuth

Height adjustment range (includes mount and tripod):

Aluminum, 1320.8mm max height

Tripod Leg Diameter:

31.75mm steel

Accessory Tray:


Tripod Weight:

1.72 kg

Slew Speeds:



Uses phone's GPS

Dovetail Compatibility:


Power Requirements:

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

Alignment Procedures:

Use StarSense Explorer app


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

Total Kit Weight:

5.17 kg

* Specifications subject to change by the manufacturer without notice
  • Telescope tube
  • Mount/tripod (preassembled)
  • 5mm & 10mm eyepieces
  • 2x Barlow lens
  • StarPointer finderscope
  • Accessory tray
  • StarSense Explorer phone dock


* Dispatch timeframes are indications only and may vary for multiple quantities. Timeframes are updated regularly during normal business hours.