Celestron 31056, 31058 instruction manual Themessiercatalog

Page 56

THEMESSIERCATALOG

The Messier Catalog, compiled by Charles Messier, was the first extensive listing of star clusters and nebulae. Messier’s primary observational purpose was to discover comets. He compiled this list so that others searching for comets would not be confused by these objects. His list still remains popular today because all of these objects are easily visible in amateur telescopes.

M#

NGC#

Const.

R.A.

DEC

Mag

Type

Proper Name

 

 

 

H M S

° ‘

 

 

 

M1

NGC 1952

Tau

5

34.5

22 01

8.4

P. Neb.

Crab Nebula

M2

NGC 7089

Aqr

21

33.5

-00 49

6.5

Gl. Cl.

 

M3

NGC 5272

CVn

13

42.2

28 23

6.4

Gl. Cl.

 

M4

NGC 6121

Sco

16

23.6

-26 32

5.9

Gl. Cl.

 

M5

NGC 5904

Ser

15

18.5

2 05

5.8

Gl. Cl.

 

M6

NGC 6405

Sco

17

40.0

-32 13

4.2

Op. Cl.

Butterfly Cluster

M7

NGC 6475

Sco

17

54.0

-34 49

3.3

Op. Cl.

 

M8

NGC 6523

Sgr

18

03.7

-24 23

5.8

D. Neb.

Lagoon Nebula

M9

NGC 6333

Oph

17

19.2

-18 31

7.9

Gl. Cl.

 

M10

NGC 6254

Oph

16

57.2

-4 06

6.6

Gl. Cl.

 

M11

NGC 6705

Sct

18

51.1

-6 16

5.8

Op. Cl.

Wild Duck Cluster

M12

NGC 6218

Oph

16

47.2

-1 57

6.6

Gl. Cl.

 

M13

NGC 6205

Her

16

41.7

36 28

5.9

Gl. Cl.

Hercules Cluster

M14

NGC 6402

Oph

17

37.6

-3 15

7.6

Gl. Cl.

 

M15

NGC 7078

Peg

21

30.0

12 10

6.4

Gl. Cl.

 

M16

NGC 6611

Ser

18

18.9

-13 47

6.0

D. Neb.

Eagle Nebula

M17

NGC 6618

Sgr

18

20.8

-16 11

7.0

D. Neb.

Omega Nebula

M18

NGC 6613

Sgr

18

19.9

-17 08

6.9

Op. Cl.

 

M19

NGC 6273

Oph

17

02.6

-26 16

7.2

Gl. Cl.

 

M20

NGC 6514

Sgr

18

02.4

-23 02

8.5

D. Neb.

TrifidNebula

M21

NGC 6531

Sgr

18

04.7

-22 30

5.9

Op. Cl.

 

M22

NGC 6656

Sgr

18

36.4

-23 54

5.1

Gl. Cl.

 

M23

NGC 6494

Sgr

17

56.9

-19 01

5.5

Op. Cl.

 

M24

NGC 6603

Sgr

18

16.4

-18 29

4.5

Op. Cl.

 

M25

IC 4725

Sgr

18

31.7

-19 15

4.6

Op. Cl.

 

M26

NGC 6694

Sct

18

45.2

-9 24

8.0

Op. Cl.

 

M27

NGC 6853

Vul

19

59.6

22 43

8.1

P. Neb.

Dumbbell Nebula

M28

NGC 6626

Sgr

18

24.6

-24 52

6.9

Gl. Cl.

 

M29

NGC 6913

Cyg

20

23.0

38 32

6.6

Op. Cl.

 

M30

NGC 7099

Cap

21

40.4

-23 11

7.5

Gl. Cl.

 

M31

NGC 224

And

0

42.7

41 16

3.4

Sp. Gx.

Andromeda Galaxy

M32

NGC 221

And

0

42.7

40 52

8.2

El. Gx.

 

M33

NGC 598

Tri

1

33.8

30 39

5.7

Sp. Gx.

Pinwheel Galaxy

M34

NGC 1039

Per

2

42.0

42 47

5.2

Op. Cl.

 

M35

NGC 2168

Gem

6

08.8

24 20

5.1

Op. Cl.

 

56 • The Messier Catalog

Image 56
Contents C150-HD and G-8N Newtonian Page B L E N T E N T S Celestial Photography T R O D U C T I O N How to Use this Manual Word of Caution Newtonian Optical System S E M B L I N G Y O U R N E W T O N I a N T E L E S C O P E Unpacking Your G-8NG-8N C150-HD Setting Up the Tripod Adjusting the Tripod HeightAttaching the Accessory Tray Attaching the Equatorial Mount They are needed later for polar alignmentAttaching the R.A. Slow Motion Knob Attaching the Declination Slow Motion Knob Attaching the Counterweight Bar and Counterweight Attaching the Telescope to the Mount For G-8N Attaching the Telescope to the Mount For C150- HD Removing the Lens Cap Balancing the Telescope in R.ABalancing the Telescope in DEC CompletelyG-8N C150-HD Installing the Finderscope Installing the Eye- piece Technical Specifications Image Orientation ActualVeiw NewtonianViewFocusing Aligning the Finder Your First Look Daytime ObservingNighttime Observing Calculating Magnification Determining Field of View T R O N O M Y B a S I C S Celestial Coordi- nate SystemMotion of the Stars Polar Alignment DefinitionFinding the Pole Latitude Scales Pointing at Polaris Declination Drift Aligning the R.A Setting Circle Polar Alignment FindersL E S T I a L O B S E R V I N G Observing the Moon PlanetsObserving the S u n Observing Deep-Sky ObjectsUsing the Setting Circles Star Hopping Celestial Observing Viewing Conditions TransparencySky Illumination SeeingCelestial Observing L E S T I a L P H O T O G R a P H Y Lunar Phase ISO Crescent Quarter 125 Full 250 Short Exposure Prime F o c u sPiggyback Celestial Photography Care and Cleaning of the Optics Collimation L E S C O P E M a I N T E N a N C EOr back out the holder screws more than one 1 to two 2 turns T I O N a L a C C E S S O R I E S Optional Accessories Single Axis Motor Drive System #93518 Themessiercatalog Great Orion Nebula Elliptical Galaxy List of Bright Stars For Further Reading Celestron ONE Year Warranty