Celestron C9-S, C8-S, C5-S instruction manual Eclipsing or obscuring the brightness of the star

Page 55

 

telescope at this rate. The rate is 15 arc seconds per second or 15 degrees per hour.

T -

 

Terminator

The boundary line between the light and dark portion of the moon or a planet.

U -

 

Universe

The totality of astronomical things, events, relations and energies capable of being described

V -

objectively.

 

Variable Star

A star whose brightness varies over time due to either inherent properties of the star or something

W -

eclipsing or obscuring the brightness of the star.

 

Waning Moon

The period of the moon's cycle between full and new, when its illuminated portion is decreasing.

Waxing Moon

The period of the moon's cycle between new and full, when its illuminated portion is increasing.

Z -

 

Zenith

Zodiac

The point on the Celestial Sphere directly above the observer.

The zodiac is the portion of the Celestial Sphere that lies within 8 degrees on either side of the Ecliptic. The apparent paths of the Sun, the Moon, and the planets, with the exception of some portions of the path of Pluto, lie within this band. Twelve divisions, or signs, each 30 degrees in width, comprise the zodiac. These signs coincided with the zodiacal constellations about 2,000 years ago. Because of the Precession of the Earth's axis, the Vernal Equinox has moved westward by about 30 degrees since that time; the signs have moved with it and thus no longer coincide with the constellations.

55

Page 54 Page 56
Image 55
Page 54 Page 56
Contents Advanced Series Advanced Series GT Introduction Assembly Telescope Maintenance Page Advanced Series Advanced Series GT C9.25-S Setting up the TripodAttaching the Equatorial Mount Installing the Counterweight BarAttaching the Center Leg Brace Attaching the Hand Control Holder Advanced GT Models Only Installing the CounterweightAttaching the Visual Back Attaching the Optical Tube to the MountInstalling the Eyepiece Installing the Star DiagonalInstalling the Finderscope Rear Cell Removing the Lens CapBalancing The Mount in R.A Moving the Telescope ManuallyAdjusting the Mount in Altitude Adjusting the MountBalancing The Mount in DEC Adjusting the Mount in Azimuth Powering the TelescopeAttaching the Declination Cable For GT Models Only Advanced GT Hand Control Double Stars Hand Control OperationStartup Procedure Alignment ProceduresAuto Three-Star Align Auto AlignLast Alignment Quick-AlignRe-Alignment Finding Planets Object CatalogSelecting an Object Slewing to an ObjectRate Button Tour ModeConstellation Tour Direction ButtonsSetup Procedures Identify Precise GoTo Observing Tip Helpful Hint Utility Features Helpful Hint Advanced GT Image Orientation Aligning the Finderscope FocusingCalculating Magnification General Observing Hints Determining Field of ViewCelestial Coordinate System Motion of the Stars Latitude Scales Definition Finding the North Celestial PoleDeclination Drift Method of Polar Alignment Observing the Sun Observing the MoonLunar Observing Hints Observing the PlanetsTransparency Solar Observing HintsObserving Deep Sky Objects Seeing ConditionsPage Short Exposure Prime Focus Photography Full Eyepiece ProjectionPlanet ISO Moon Mercury Venus Mars Jupiter Saturn Long Exposure Prime Focus PhotographyPage CCD Imaging Terrestrial PhotographyMetering Reducing VibrationAuto Guiding Collimation Care and Cleaning of the OpticsCollimated telescope Should appear Symmetrical with Page Page Page Appendix a Technical Specifications Appendix B Glossary of Terms Page Eclipsing or obscuring the brightness of the star Appendix C Longitudes Latitudes Georgia Minnesota Rhode Island Canada Appendix D RS-232 Connection Additional RS232 Commands Appendix E Maps of Time Zones Page Page Page Page Page Page Page Celestron TWO Year Warranty
Related manuals
Manual 69 pages 53.18 Kb

C5-S, C9-S, C8-S specifications

Celestron, a leader in the field of amateur and professional astronomy, offers a range of telescopes ideal for both novices and experienced stargazers. Among their most celebrated models are the C8-S, C5-S, and C9.25-S, each designed with unique features and technologies that enhance the observational experience.

The Celestron C8-S is an iconic telescope known for its 8-inch aperture. This Schmidt-Cassegrain design combines a compact form factor with a powerful light-gathering capability, making it perfect for deep-sky observing. Its optical tube has a focal length of 2032mm, providing an excellent balance of wide field viewing and high magnification. The C8-S features Celestron's StarBright XLT optical coating, enhancing light transmission and contrast, ensuring that even faint objects are visible. With compatibility for various accessories and a sturdy mount, the C8-S stands as a versatile option for different observing styles.

Moving to the C5-S, this model boasts a 5-inch aperture while maintains a compact and portable design. It is particularly popular among travelers and casual astronomers who value convenience without compromising on quality. The C5-S also employs the Schmidt-Cassegrain design, providing sharp images and improved color correction. With its shorter focal length of 1250mm, the C5-S excels in both planetary and deep-sky observation. The telescope's lightweight build makes it easy to transport, while the integrated optical systems ensure a clear view of celestial objects.

The C9.25-S represents a step up in performance, featuring a 9.25-inch aperture that captures more light than its smaller counterparts. This telescope offers a versatile focal length of 2350mm, allowing for impressive high-power planetary views, as well as detailed observations of deep-sky objects. The C9.25-S utilizes a unique StarBright XLT coating and features advanced optics that minimize optical distortion, resulting in sharp, high-contrast images. It is equipped with a sturdy mount that ensures stability during extended observation sessions.

All three models are compatible with Celestron's advanced computer-driven mount systems, allowing for effortless tracking and alignment. With built-in features such as GoTo technology, users can easily locate thousands of celestial objects with the touch of a button. This combination of advanced optics, portability, and user-friendly technology makes the Celestron C8-S, C5-S, and C9.25-S excellent choices for anyone looking to explore the cosmos more deeply. Whether for casual stargazing or serious astronomical study, these telescopes deliver exceptional performance to meet a variety of needs.
Top Page Image Contents