User manual MEADE PERSONAL SOLAR TELESCOPE

[. . . ] Begin the timing as the star crosses one edge of the scale and end the timing as the star crosses the other edge of the scale. Record the timings and average them. 8. 2 3 4 360° Position Angle Segmented in Units of 5° Scale Double Crossline/ Concentric Circle Guiding Scale Four Concentric Circles with Each Inner Circle Representing . 5 Width, . 25 Width, and . 10 Width of the Outer Circle Dimension, Bisected with a Double Crossline With the timings recorded and averaged, an accurate determination of the angular diameter of the sky that the Linear Diameter Scale represents can be calculated. Stars at or near the zenith move across the sky at 15 arc seconds per second (sidereal rate). To determine the true angular diameter in arc seconds, multiply the number of seconds of the averaged timing of the scale by 15. [. . . ] Repeat these steps if the Eyepiece is used on a different setup (e. g. , used with a different diagonal, a Barlow lens, etc. ). Knowing the measurements of the scales of the reticle, the observer can take measurements to determine apparent diameters or angular separations of celestial objects (e. g. , planets, deep-sky objects, craters on the Moon, double stars, etc. ). Other measurements can be made, such as the periodic error of the telescope's drive system. 3. 6. -2Determining Position Angle: Position angle (PA) in astronomical terms is the direction in the sky of one celestial body with respect to another, measured from 0° to 360° in an easterly direction from north. Position angles are used by astronomers, for example, to give the position of a tail of a comet with respect to the nucleus of the comet, or to measure the position angle one component of a multiple star to another. To make a position angle measurement, calibrate the orientation of the 360° Position Angle Scale (3, Fig. Set up the telescope and insert the Astrometric Eyepiece with the LED illuminator turned on. Check the collimation of the telescope (refer to the telescope's instruction manual). Aim the telescope at or very near (within +/- 5°) the zenith (perpendicular to the ground). Release the set-screw of the eyepiece holder and rotate the Astrometric Eyepiece within the eyepiece holder so that a star drifts across the 90° mark of the Position Angle Scale and then exits across the 270° mark. Find the object that the position angle is measured for (e. g. , discernable edge or center line of a comet's jet or tail that extends across the eyepiece field of view). · Clean the battery contacts and also those of the device prior to battery installation. · Ensure the batteries are installed correctly with regard to polarity (+ and -). · Remove the batteries from any weather station which is not to be used for an extended period of time. · Do not mix alkaline, lithium, standard (Carbon Zinc), or rechargeable (Nickel Cadmium) batteries. Caution: · If batteries or parts are swallowed, see a doctor immediately. STANDARD WARRANTY INFORMATION This product is warranted by Meade Instruments Corp. (MIC) to be free of defects in materials and workmanship for a period of ONE YEAR from date of original retail purchase in the U. S. A. MIC will repair or replace the product, or part thereof, found upon inspection by MIC to be defective, provided the defective part or product is returned to MIC, freight prepaid, with proof of purchase. This warranty applies to the original purchaser only and is non-transferable. Meade products purchased outside North America are not included in this warranty. RGA Number Required: Prior to the return of any product or part, a Return Goods Authorization (RGA) number must be obtained by writing to Meade's Customer Service Department or by calling 800-626-3233. [. . . ] This warranty supersedes all previous Meade product warranties. 3. · · Guiding the Telescope: The Double Crossline/Concentric Circle Guiding Scale (4, Fig. 2) is specifically designed for guiding on a star during an astrophotograph. The finest astrophotographs have sharply focused stars that are perfectly round. In order to achieve this level of quality in the final image, constant monitoring of a "guide star" is required to make the proper "drive corrections. " The double crosslines and concentric circles of the Guiding Scale allow for a single star or group of stars to be guided on simultaneously. [. . . ]