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Celestron CR-150 HD Themessiercatalog, Ngc#, Const, Type, Proper Name, H M S, The Messier Catalog

Models: CR-150 HD

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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.

The Messier Catalog • 53

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Celestron CR-150 HD instruction manual Themessiercatalog, Ngc#, Const, Type, Proper Name, H M S, The Messier Catalog

Contents

6 Refractor Model #21017The CR-150HD Assembling the CG-5Equatorial Mount T A B L E O F C O N T E N T Sii Table of Contents Table of Contents Using the Lens Cap Aperture Stop4 Introduction I N T R O D U C T I O NIntroduction How to Use This Manual AWordofCaution6 Introduction The Refractor Optical SystemThe Mount Unpacking Your CR-150HD A S S E M B L I N G Y O U R C R - 1 5 0 H DThe CR-150HD Assembling the CG-5Equatorial Mount Setting Up the Tripod Adjusting the Tripod HeightTripod Head The CR-150HD10 The CR-150HD Attaching the Accessory TrayThe CR-150HD Attaching the Equatorial Mount12 The CR-150HD Attaching the R.A. Slow Motion KnobThe CR-150HD Attaching the Declination Slow Motion Knob14 The CR-150HD 1.Lock the DEC clamp to hold the mount in placeTube Rings Dovetail Bracket Attaching the Telescope to the MountThe CR-150HD 16 The CR-150HD Balancing the Telescope in R.AThe CR-150HD Balancing the Telescope in DECCOMPLETELY 18 The CR-150HD Adjusting the Mount in AltitudeAdjusting the Mount in Azimuth Disassembling and Transporting Your CR 150 HD Technical SpecificationsStoring Your CR- 150 HD OPTICAL TUBET E L E S C O P E B A S I C S Attaching the AccessoriesThe Star Diagonal The EyepieceFocuser Tension 1 1/4 AccessoryAdapter Built-inT-Adapter22 Telescope Basics FocusingAttaching the Finder Telescope Basics Aligning the FinderYourFirstLook Image OrientationDaytimeObserving NEVER POINT YOUR TELESCOPE AT THE SUN UNLESSTelescope Basics • Nighttime Observing26 Telescope Basics Calculating MagnificationDetermining Field of View Telescope Basics GeneralPhotographyHints Your Celestron telescope can be used for both terrestrial and astronomical photography. Your telescope has a fixed aperture and, as a result, a fixed f/ratio. To properly expose your subjects photographically, you need to set your shutter speed accordingly. Most 35mm single lens reflex SLR cameras offer through-the-lens metering that lets you know if your picture is under or overexposed. This is important for terrestrial photography where exposure times are measured in fractions of a second. In astrophotography, the exposures are much longer, requiring that you use the “B” setting on your camera. The actual exposure time is determined by how long you keep the shutter open. More on this in the section on “Celestial Photography.”28 Astronomy Basics A S T R O N O M Y B A S I C SThe Celestial Coordi- nate System Astronomy Basics Motion of the StarsEquator Polar AlignmentDefinition 30 Astronomy BasicsAstronomy Basics Finding the PoleDefinition 32 Astronomy Basics Latitude ScalesAstronomy Basics PointingatPolaris34 Astronomy Basics DeclinationDriftAstronomy Basics Aligning the R.A Setting CirclePolar Alignment Finders Observing the Observing the MoonPlanets C E L E S T I A L O B S E R V I N GObserving the Sun Using the Lens Cap Aperture StopSOLAROBSERVINGHINTS Celestial Observing38 Celestial Observing Using the Setting CirclesObserving Deep-SkyObjects Celestial Observing StarHopping40 Celestial Observing Transparency Viewing ConditionsSky Illumination Seeing42 Celestial Observing Celestial Photography C E L E S T I A L P H O T O G R A P H YLunar Phase Short Exposure Prime FocusCrescent QuarterCelestial Photography The exposure times listed here should be used as a starting point. Always make exposures that are longer and shorter than the recommended time. Also, try bracketing your exposures, taking a few photos at each shutter speed. This will ensure that you will get a good photo. If using black and white film, try a yellow filter to reduce the light intensity and to increase contrast46 Celestial Photography PiggybackCelestial Photography Ektar 1000 color print Konica 3200 color print48 Celestial Photography Projection PhotographyTelescope Maintenance Care and Cleaning of the OpticsT E L E S C O P E M A I N T E N A N C E O P T I O N A L A C C E S S O R I E S 50 Optional AccessoriesDual Axis Drive System - #93523 Super Modified Achromatic SMA EyepiecesOptional Accessories Motor Drive System - #93518 52 Optional AccessoriesNGC# THEMESSIERCATALOGConst TypeConst NGC#Type Proper NameConst NGC#Type Proper NameEpoch LIST OF BRIGHT STARSStar Name ConstellationAstronomy Texts FOR FURTHER READINGAtlases General Observational AstronomyCELESTRON ONE YEAR WARRANTY Item #21017-INST Price $10.00 Celestron International 2835 Columbia StreetTorrance, CA Tel Fax