Assessments - 2, GPA: 4 ( )

Fabricante : iOptron Arquivo Tamanho: 1.17 mb Arquivo Nome : Língua de Ensino:

Press < or > key, move the cursor to the line below time info to set the time zone information (add or subtract 60 minutes per time zone). Enter minutes “ahead of” or “behind” UT (universal time). • New York City is 300 minutes “behind” UT • Los Angeles is 480 minutes “behind” UT • Rome is 60 minutes “ahead of” UT • Beijing is 480 minutes “ahead of” UT • Sydney is 600 minutes “ahead of” UT All the time zones in North America are behind UT (universal time), as shown in the following table. So make sure it shows “behind” instead of “ahead of” UT. Time Zone Hours behind UT Enter Minutes Hawaii -10 600 Alaska -9 540 Pacific -8 480 Mountain -7 420 Central -6 360 Eastern -5 300 To adjust minutes, move the cursor to each digit and use the n^ or Ў key to change the number. To change the “behind” or “ahead of” UT, move the cursor to “ahead of” and using ^ or Ў key to toggle between “behind” and “ahead of”. For other parts of the world, you can find out your “time zone” information from internet, such as DO NOT COUNT DAYLIGHT SAVING TIME. To set daylight saving time, use the < or > key to move the cursor to the bottom of the screen, use ^ or Ў button to toggle the Daylight Time Saving between X, which means “No” and v, which means (Yes). When the number is correct, press ENTER and go to “Setup Site Info” screen: Set up site info: Longitude: W071d27m47s Latitude: N42d15m40s The longitude and latitude coordinates will be updated when the GPS picks up satellite signals. “W/E” means west/east hemisphere; “N/S” means north/south hemisphere; “d” means degree; “m” means minute; and “s” means second. 13 If for any reason your GPS can’t pick up a signal you can manually enter the GPS coordinates. Press < or > key to move the cursor and using ^ or Ў key to toggle between “W” and “E”, “N” and “S”, or to change the numbers. It is always a good idea to do your home work to get the GPS coordinates before traveling to a new observation site. The site coordinates information can be found from internet, such as GPSVisualizer (by entering the city name or address. In case you only find the site information in decimal format you can convert them into d:m:s format by multiplying the decimal numbers by 60. For example, N47.53 can be changed to N47.31'48”: 47.53. = 47. +0.53., 0.53.=0.53x60'=31.8', 0.8'=0.8x60"=48". Therefore, 47.53.=47.31'48" or 47d31m48s. Same as N47.31.8’: 31.8’=31’+0.8’, 0.8’=0.8x60”=48”. 4.2.2. Using your telescope Selecting an Eyepiece: 1. Always begin viewing with the lowest power eyepiece. (Note: a 25 mm focal length eyepiece has a lower power than a 10 mm one.) A formula can be used to determine the power of each eyepiece: Telescope focal length divided by eyepiece focal length equals magnification. Ex. 400mm . 25mm = 16X (magnification). The rule of thumb is that the magnification should not be too much larger than the OTA aperture, otherwise view and color distortion may occur. 2. A 45° Erecting Diagonal Prism is included in the R80 or MC90 telescope. The Erecting Diagonal Prism is used to erect the image you will see. Astronomical telescopes are designed in such a way that the image you see may be UPSIDE DOWN and REVERSED. This is perfect for viewing celestial bodies. However, it will feel strange when observing a land object or a bird. Focusing Telescope: 1. After selecting the desired eyepiece aim the telescope tube at a land-based target at least 200 yards away (e.g. A telephone pole or building). Fully extend focusing tube by turning the focus knob. 2. While looking through selected eyepiece, slowly retract focusing tube by turning focusing knob until object comes into focus. Aligning Finderscope: 1. Look through main telescope tube and establish a well-defined target (see focusing telescope section). Tighten all lock knobs (Declination, Latitude, Right Ascension, Horizontal Axis) so that telescope’s aim is not disturbed. 2. Turn on the red dot finder and look through the finder window. Adjust the red dot alignment screws to center the red dot on the object. 3. Now, objects located with the finderscope first will be centered in field of view of the main telescope. 4.2.3. Go to the Moon After performing these setups, the mount is ready to GOTO and track objects. The most common object will be the Moon. Press MENU button, select “Select and Slew” by press ENTER button. Select “Planets, Sun, Moon”, and using ^ or Ў button to select Moon. Press ENTER. The telescope will automatically slew to the Moon and lock on. It will automatically begin to track once it locks on to it. Use the arrow keys to center the Moon in your eyepiece, if it is not centered. Press BACK key to stop GOTO during the slew. Press ENTER key to stop the tracking. 4.2.4. Initial Star Alignment A simple alignment/synchronization can be performed to improve the GOTO and 14 tracking accuracy. To do so, press MENU button, scroll down to “Align”, select “Easy One Star A...

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