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Designed to capture the spirit of modern space exploration, the Celestron Moon Mission 100mm Tabletop Dobsonian offers an accessible 3.9-inch aperture and simple Newtonian optics. According to reporting by Space, the portable telescope retails with two eyepieces, a red-dot finderscope, a moon filter, and planetary software access for backyard stargazers.
Specifications and Out-of-Box Assembly
According to Space, the Celestron Moon Mission 100mm Tabletop Dobsonian features a Newtonian reflector optical design with a 3.9-inch (100 mm) aperture, a 15.75-inch (400 mm) focal length, and an f/4 focal ratio. Weighing 2.4 lbs (1.08 kg), the portable instrument utilizes a single-arm Dobsonian mount that rotates on a lazy Susan turntable, eliminating the need for a traditional tripod as long as a stable, flat surface is available.
Reviewers at Space noted that the telescope comes out of its box nearly complete, with the exception of its eyepieces and red-dot finderscope packed in plastic bags. Set-up takes only minutes using thumbscrews without requiring tools like screwdrivers or Allen keys. However, reviewers experienced tight eyepiece-locking thumbscrews, noting that children will definitely need the help of an adult to unscrew these
before they can be adjusted to more forgiving tolerances.
Included Accessories and Optical Equipment
The package ships with an array of accessories designed to help beginners navigate the night sky.
- An 8mm eyepiece providing 50x magnification
- A 20mm eyepiece providing 20x magnification (intended specifically for viewing the moon)
- A red-dot finderscope
- A dedicated moon filter
- A moon-map poster
- Free access to download the Starry Night planetarium software and Celestron’s SkyPortal app, powered by SkySafari
Reviewers observed that while the focuser can occasionally feel finicky, the overall build quality of the optical tube, Dobsonian base, tilt adjustments, and focuser knobs is sturdy enough for entry-level use.
Backyard Observations of Planets and Multiple Stars
During field tests on the night of April 5, reviewers turned the telescope toward Jupiter, which was visible in Gemini near the twin stars Castor and Pollux. According to Space, the planet appeared as a bright disk accompanied by all four Galilean moons—Io and Europa on one side, and Ganymede and Callisto on the other.
When directed at the multiple star system Castor using the 20mm eyepiece, the telescope cleanly split the main binary pair into two close, white stars. Similarly, when targeting the Ursa Major system of Mizar and Alcor, the telescope clearly revealed the three visible stars. Slewing further east, observers tracked Arcturus, noting its distinct red appearance as a red giant.
Deep-Sky Targets and Entry-Level Versatility
Although the product box highlights the Orion Nebula and the Andromeda Galaxy as accessible deep-sky targets, testing conditions presented scheduling and placement hurdles. According to Space, the Orion Nebula was positioned too low in the west while the Andromeda Galaxy remained invisible during the observation window.
Instead of those targets, reviewers redirected their search to neighboring galaxies M81 and M82 in Ursa Major. According to Space, the instrument serves as an entry-level platform that allows users to graduate to increasingly sophisticated equipment later on, even though its accessories and optics have minor imperfections.
