Celestron STARSENSE EXPLORER 114 TABLETOP DOBSONIAN Manuel utilisateur

INSTRUCTION MANUAL

#22480 STARSENSE EXPLORER 114 TABLETOP DOBSONIAN

#22481 STARSENSE EXPLORER 130 TABLETOP DOBSONIAN

#22482 STARSENSE EXPLORER 130 TABLETOP DOBSONIAN

#22482 STARSENSE EXPLORER

150 TABLETOP DOBSONIAN

#22481 STARSENSE EXPLORER

130 TABLETOP DOBSONIAN

#22480 STARSENSE EXPLORER

114 TABLETOP DOBSONIAN

TABLETOP DOBSONIANS

2I ENGLISH

TABLE OF CONTENTS

What’s in the Box . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3

Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4

Pointing the Telescope . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8

Focusing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9

Rotating the Optical Tube . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9

Using the StarPointer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10

StarSense Explorer Dock and App . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11

Determining Magniﬁcation and Selecting Eyepieces . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

Cooling your Telescope’s Optics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13

Note about Smartphone Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13

Your First Night Out - What to Expect . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13

Dark Adaptation and Light Pollution . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

Use of Filters. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14

Using the Optional Tripod . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

Collimating the Optics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

Transporting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

Care and Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

Speciﬁcations StarSense Explorer 114 Tabletop Dobsonian . . . . . . . . . . . . . . . . . . . . . . . . . . . .21

Speciﬁcations StarSense Explorer 130 Tabletop Dobsonian . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

Speciﬁcations StarSense Explorer 150 Tabletop Dobsonian . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

Solar Warning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

INTRODUCTION

Congratulations on your purchase of the Celestron StarSense Explorer Tabletop Dobsonian (SSE Tabletop Dob) telescope. Your

SSE Tabletop Dob combines high-quality reﬂector optics with the exciting StarSense Explorer dock and app to make ﬁnding and

observing all kinds of astronomical objects fun and easy! You’ll be able to locate planets and deep-sky objects—galaxies, nebulae,

star clusters, and more— and place them within the eyepiece’s ﬁeld of view in seconds. The primary mirror collects lots of light,

enabling you to see details in objects you may have never seen before. Since the telescope is so easy to use, you’ll ﬁnd yourself

reaching for it often. And with its grab-and-go convenience, it’s perfect for an impromptu backyard stargazing session or a camping

trip to dark skies.

Before taking your SSE Tabletop Dob outside for your ﬁrst night of observing, we recommend reading this manual. It will help you

better understand your telescope’s features and what to expect.

ENGLISH I 3

WHAT’S IN THE BOX

Feet

(x3)

Screwdriver

INCLUDED TOOLS

FEET ASSEMBLYTRIPOD ADAPTER AZIMUTH PIVOT

BOLT ASSEMBLY

EYEPIECE RACK ASSEMBLY

Crescent

wrench

Hey keys

114mm (x2)

130mm (x3)

150mm (x3)

Bolt

Nut

Steel

washers

(x2)

Hollow

plastic

cylinder

Teﬂon

washer

Feet

screws (x3)

Feet screw

covers (x3)

Optical tube

assembly with

dust cover

Optical tube

assembly with

dust cover

150mm130mm114mm

Optical tube

assembly with

dust cover

Side panel

assembly

Side support(s)

114mm (x1)

130mm (x1)

150mm (x2)

Tripod adapter

discs (x3)

Eyepiece rack

130mm

150 mm

Eyepiece rack

114mm

StarSense

Explorer Dock

StarPointer

red-dot ﬁnder

17mm Eyepiece

(114mm)

25mm Eyepiece

(130mm & 150mm)

Collimation

cap*

*For collimating your telescope’s optics, refer to

the full instruction manual at celestron.com.

10mm

Eyepiece

Tripod adapter

screws (x9)

Base assembly

screws

114mm (x6)

130mm (x7)

150mm (x11)

Base assembly

screw covers

114mm (x2)

130mm (x2)

150mm (x6)

Top Plate Bottom Plate

Side panel

assembly

Side panel

assembly

B1B1

F1F1 G H

I1J

C2D1D2D3

B3B4B5B6

A A A

4I ENGLISH

ASSEMBLY

For the 114mm and 130mm models:

1. Connect the side support (B2) to the side panel (B1)

with the base assembly screws (B5). The supports go

on the on the same side of the panels as the Celestron

logo.

For the 150mm model:

1a. Connect the 2 side supports (B2) to the side panel

(B1) with the base assembly screws (B5). The

supports go on the on the same side of the panels as

the Celestron logo.

1b1a

3. Connect the assembly to the top plate (B3) using the

base assembly screws (B5). Orient the top plate so the

side with the logo faces upward. For the 114mm model

there will be 4 screws to install, for the 130mm and

150mm models there will be 5 screws to install.

2. If desired, you can install the cosmetic screw covers

(B6) on the screws installed in Step 1. Press the

covers ﬁrmly onto the screw heads. For the 114mm and

130mm models there will be 2 screw covers to install,

for the 150mm model there will be 6 screw covers to

install.

ENGLISH I 5

7. Use the crescent wrench and large hex key to tighten

the nut onto the bolt. Hold the head of the bolt

stationary with the hex key while using the crescent

wrench to tighten the nut. DO NOT OVERTIGHTEN

THE NUT! With some force, you should still be able

to move the steel washer underneath the nut with

your ﬁngers. If the washer cannot be moved with your

ﬁngers, slightly loosen the nut.

6. Connect the assembly to the bottom plate (B4). Place

one of the steel washers (E2) and the plastic cylinder

(E4) onto the bolt (E5). Then, insert the bolt through

the central hole in the bottom plate. Next, place the

Teﬂon washer (E3) over the plastic cylinder (E4) now

protruding from the bottom plate. Take the assembled

base and lower it onto the bottom plate so that the

plastic cylinder goes through the central hole in the top

plate. Now, place the remaining steel washer (E2) on the

end of the bolt protruding from the top plate. Thread the

nut (E1) onto the bolt. Go to Step 7 for instructions to

tighten the bolt.

5. Attach the 3 feet (D1) to the bottom plate (B4) using

the feet screws (D2). Thread the screws ﬁrmly into the

predrilled pilot holes. Once installed, press the feet

screw covers (D3) onto the ends of the feet.

4. Attach the 3 tripod adapter discs (C1) to the bottom

plate (B4) using the tripod adapter screws (C2). Thread

the screws ﬁrmly into the predrilled pilot holes but do not

overtighten or you may strip the wood.

B4B4

6I ENGLISH

For the 150mm model:

9c. Connect the optical tube assembly (A) to the

assembled base.You’ll need to connect the tube rings

to the tube ring mounting plate on the base. Use

the screws and lock washers already installed in the

rings to do this. It will be easiest to ﬁrst remove the

rings from the optical tube to assemble them onto the

mounting plate. Fully unthread the tube ring knobs and

open the rings to remove the tube.

For the 114mm model:

9a. Connect the optical tube assembly (A) to the

assembled base.Fully unthread the clamping knob on

the cradle and open the cradle. Place the optical tube

in the cradle as shown, close the cradle, and retighten

the clamping knob until secure.

8. Install the eyepiece rack (F1) by placing the keyholes in

the rack over the mounting screws pre-installed in the

side panel, then push the rack downwards.

NOTE: If you want to remove the rack for storage or

transport, simply pull it upward.

For the 130mm model:

9b. Loosen the knob on the dovetail holder on the side

panel. Then, insert the dovetail connected to the

optical tube with the tube rings, and retighten the knob

until the dovetail is secure in the holder.

8 9a

ENGLISH I 7

11. Line up the arrow on the dock with the alignment mark

on the base and press inward while turning the dock

counterclockwise until the orange release button snaps

into place in the hole on the dock. To remove the dock,

press the orange release button and turn the dock

clockwise until the bayonet mount releases.

For the 114mm model:

12a. Install the StarPointer red dot ﬁnderscope (H) onto

the optical tube assembly. First, unthread and remove

the two thumbnuts from the threaded posts adjacent

to the focuser. Place the StarPointer on the tube

so the threaded posts go through the holes in the

StarPointer’s base, then rethread the thumbnuts onto

the posts to secure the StarPointer.

For the 130mm and 150mm models:

12b. Install the StarPointer red dot ﬁnderscope (H)

onto the optical tube assembly. First, loosen the

thumbscrew on the ﬁnderscope holder. Insert the

base of the StarPointer into the holder and tighten the

thumbscrew.

12a

12b

10. Install the StarSense dock (G). Insert the bayonet mount

on the side of the dock into the port on the side panel of the

base.

8I ENGLISH

13. Loosen the thumbscrews on the end of the focuser,

remove the focuser’s cover cap, and insert the 25mm

(or 17mm) eyepiece. Retighten the thumbscrews on

the focuser to secure the eyepiece in place.

13 I1

POINTING THE TELESCOPE

The tabletop Dobsonian base is an altazimuth mount, which

means it moves the telescope in two directions: up-and-

down (i.e., altitude) and left-to-right (i.e., azimuth) (Figure 2).

ALTITUDE

AZIMUTH

Figure 2: StarSense Explorer Tabletop Dobsonians have two axes of

motion: altitude (up-and-down) and azimuth (left-to-right).

Pointing your SSE Tabletop Dob at an object is easy. Simply

move the telescope tube up-and-down and left-to-right

until it is pointing toward the desired object, and the object

appears in the telescope’s eyepiece.

For the 150mm model, the panning knob at the front of

the telescope tube provides a convenient place to grasp the

tube for pointing (Figure 3). Using this knob also prevents

heat from your hand from entering the optical path, which

can temporarily distort the view.

Figure 3: Grasp the panning knob on the 150mm SSE Tabletop Dob when

pointing the telescope.

You can adjust the tension along the altitude axis by turning

the altitude tensioning knob (Figure 4).

Figure 4: Adjust the tension of the altitude axis with the altitude tensioning

knob.

Turn the knob to add enough tension to provide a smooth

up-and-down motion. Under most circumstances, you

won’t need to add much tension. However, if you are using

a heavy eyepiece, you may need to add more tension so the

telescope remains still when not touched.

Ensure the telescope is balanced front-to-back in the rings

or cradle for the best performance. Slightly loosen the

clamping knob(s) on the tube rings or cradle and move

the telescope forward or back until it is balanced. Then

retighten the clamping knob(s) (Figure 4a).

ENGLISH I 9

Figure 4a: To balance the telescope, move it forward or back in the rings

If you are using a very heavy eyepiece, ﬁrst try tightening

the altitude tensioning knob. If the telescope still doesn’t

have enough tension or becomes hard to move, rebalance

the telescope.

FOCUSING

Your SSE Tabletop Dobs features a 1.25” rack-and-

pinion focuser. To use a 1.25” eyepiece, simply place it

in the focuser and tighten the thumbscrews to secure the

eyepiece in place.

To focus, turn the focus knobs clockwise or

counterclockwise until the object in the telescope

eyepiece is in sharp focus.

Figure 5: Secure the 1.25” eyepiece in the focuser with the thumbscrews.

Since the SSE Tabletop Dob is a Newtonian reﬂector, the

images appear upside-down compared to the naked eye

(Figure 6). While this has little impact on astronomical

observation, it can be a bit confusing when you are viewing

land-based objects.

VIEW THROUGH NEWTONIAN REFLECTOR TELESCOPE

NAKED EYE VIEW

Figure 6: Like all Newtonian reﬂectors, the SSE Tabletop Dob produces

images that appear upside-down compared to the naked eye.

ROTATING THE OPTICAL TUBE

You may want to rotate the optical tube relative to the base

for a more comfortable, ergonomic viewing position. To do

so, slightly loosen the clamping knob(s) on the cradle or

tube rings, rotate the tube in the cradle/rings, and retighten

the clamping knob(s) (Figure 6a).

Figure 6a: To rotate the optical tube for a more ergonomic focuser position,

simply loosen the clamping knob(s) on the tube rings or cradle.

10 I ENGLISH

USING THE STARPOINTER

Although you won’t need to rely on the StarPointer red-dot

ﬁnderscope when using the StarSense Explorer app, it can

help you align the app with the telescope. The StarPointer

also comes in handy when locating objects during the day

since the app only works under the stars at night.

To align the StarPointer, point the telescope at an object at

least a quarter mile away. We recommend aligning during

the day. Choose a distant tree, sign, building, or other

landmark. If you align at night, you can use a streetlight, the

Moon, or a bright star or planet.

Once you have pointed the telescope at the object, ensure

it appears in the eyepiece. Next, turn the StarPointer on

using the LED dial (Figure 7).

LED DIAL

ALTITUDE KNOB AZIMUTH KNOB

Figure 7: The StarPointer red-dot ﬁnderscope.

Turn up the brightness level until you can easily see the

red dot. Now, without moving the telescope, use the

StarPointer’s altitude and azimuth adjustment knobs to

center the red dot on the same object you centered in

the telescope eyepiece. When you’re ﬁnished, ensure the

object is still centered in the telescope eyepiece. If it is,

you have aligned the StarPointer successfully. If not, move

the telescope so the object in the telescope’s eyepiece is

centered again. Use the StarPointer’s altitude and azimuth

adjustment knobs to center the red dot on the object again.

Turn off the StarPointer when you aren’t using it to conserve

its battery. While the StarPonter’s battery should last a long

time, you’ll need to replace it with a CR2032 3V Lithium

button cell battery eventually. These batteries are easy to

ﬁnd at a variety of retailers.

To replace the battery:

1. Use a Phillips-head screwdriver to remove the battery

cover securing screw (Figure 8).

Figure 8: To open the StarPointer’s battery cover, ﬁrst remove the

securing screw.

2. Remove the discharged battery from the battery com-

partment. You may need a knife or screwdriver to pry the

battery out of its holder.

3. Insert the new battery so that the positive side is visible

to you. Ensure the battery is seated correctly within the

battery compartment (Figure 9).

Figure 9: When the battery is properly seated in the compartment as

shown, the battery cover should be easy to reinstall.

4. Close the battery compartment and reinstall the securing

screw.

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