Celestron StarSense Explorer LT 127AZ Smartphone App-Enabled Newtonian Reflector Telescope

Product code: 22453

Available to Order - Expected leadtime approx 7 - 10 days 

Uses your smartphone to analyse the night sky and calculate its position in real time

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Celestron StarSense Explorer LT 127AZ Smartphone App-Enabled Newtonian Reflector Telescope

Available to Order - Expected leadtime approx 7 - 10 days


Celestron are innovators and they have reinvented the manual telescope with their new StarSense Explorer range — the first telescope that uses your smartphone to analyse the night sky and calculate its position in real time. StarSense Explorer is ideal for beginners thanks to the app’s user-friendly interface and detailed tutorials. It’s like having your own personal tour guide of the night sky.

Dock, Launch, Explore: Leave complicated star charts, imprecise planetarium apps, and computerised mounts behind. With StarSense Explorer, locating objects has never been easier, faster, or more accurate. Within minutes of setting up the telescope, you’ll be navigating the sky with confidence. Simply place your phone in the unique StarSense dock and launch the StarSense Explorer app. After aligning your phone to the telescope’s optics (a quick, 2-minute procedure), StarSense Explorer generates a list of celestial objects currently visible. Make your selection and arrows appear onscreen, guiding you as you to move the telescope. When the object is ready to view, the bullseye turns green.

Smartphone Compatibility: StarSense Explorer works 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, see the compatibility tab.

Patent-Pending StarSense Sky Recognition Technology: StarSense Explorer uses patent-pending technology and your smartphone to determine exactly where the telescope is pointed in the night sky. A Lost in Space Algorithm (LISA), like the ones satellites use in orbit to correctly reorient themselves, helps the app match star patterns it detects overhead to its internal database.

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

Sturdy Altazimuth Mount: StarSense Explorer LT’s simple altazimuth mount makes it easy to move the telescope to find your target. A slow-motion altitude adjustment knob helps you fine tune the telescope’s pointing position and follow targets as they appear to drift across the night sky. It’s all anchored by an adjustable, full-height tripod.

Dazzling Views with High Quality Optics: With a large 127mm (5”) mirror, this telescope has enough light gathering ability to bring out detail in celestial objects. You can expect sharp, 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 Pleaides Open Star Cluster.

Perfect for the City or Dark Sky Sites: Even if you live in a light polluted city location, StarSense Explorer is advanced enough to be able to pick out Jupiter, Saturn, Venus, the Orion Nebula, double stars, and a few more of the most famous celestial objects. However, if you can take the telescope to an even slightly darker location, more objects will become visible. With this 5” Newtonian and relatively dark skies, the Andromeda Galaxy, Hercules Open Star Cluster, and so many more are easily within your reach.

The entire telescope kit weighs just 11.4 pounds, so it’s perfectly portable and easy to bring on your next camping trip or to a remote observing site.

Everything You Need to Observe Immediately: When you unbox your new StarSense Explorer LT, you’ll find all of the following:

  • 127mm Newtonian reflector optical tube
  • StarSense dock for your smartphone
  • Low powered (25mm) and high powered (10mm) eyepiece
  • 2x Barlow lens to double the power of each eyepiece
  • StarPointer red dot finderscope, perfect for using the telescope during the day or without the StarSense Explorer app
  • Alt-azimuth mount with slow motion control rod
  • Full-height tripod with an accessory tray to keep you organised

Optical Tube Info:    
Optical Design    Newtonian Reflector
Aperture    127mm (5”)
Focal Length    1000mm (39.3")
Focal Ratio    f/7.87
25mm    25mm (.98")
Magnification of Eyepiece 1    40x
10mm    10mm (.39")
Magnification of Eyepiece 2    100x
Barlow Lens    2x (1.25”)
Finderscope    StarPointer red dot finder

Optical Tube    Steel
Highest Useful Magnification    300x 
Lowest Useful Magnification    18x
Limiting Stellar Magnitude    13
Resolution (Rayleigh)    1.1 arc seconds 
Resolution (Dawes)    0.91 arc seconds
Light Gathering Power (Compared to human eye)    329x
Secondary Mirror Obstruction    41mm (1.6")
Secondary Mirror Obstruction by Diameter    32%
Secondary Mirror Obstruction by Area    10%
Optical Coatings    Glass mirrors coated with aluminium and SiO₂
Optical Tube Length    457.2mm (18”)
Optical Tube Diameter    165.1mm (6.5")
Optical Tube Weight    7.6 lbs (3.44 kg)
Dovetail    None
Mount Info:    
Mount Type    Manual Alt-Azimuth
Height adjustment range (includes mount and tripod)    Aluminium, 1320.8mm (52”) max height
Tripod leg diameter    31.75mm (1.25”) steel
Accessory Tray    Yes
Tripod Weight    3.8 lbs (1.72 kg)
Slew Speed    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    11.4 lbs (5.17 kg)
Included Items    Telescope tube | Mount/tripod (pre-assembled) | 25mm & 10mm eyepieces | 2x Barlow lens | StarPointer finderscope | Accessory tray | StarSense Explorer phone dock

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Brand Celestron
Condition New
Product Code 22453