Welcome to Astronomy & Telescope Astronomy



· Home
· AvantGo
· Content
· Downloads
· Encyclopedia
· Feedback
· Forums
· Journal
· Members List
· Private Messages
· Recommend Us
· Reviews
· Search
· Statistics
· Stories Archive
· Submit News
· Surveys
· Top 10
· Topics
· Web Links
· Your Account

  Who's Online

There are currently, 9 guest(s) and 0 member(s) that are online.

You are Anonymous user. You can register for free by clicking here




Select Interface Language:


  Random Headlines

Piggyback Camera
[ Piggyback Camera ]

·Astronomy: Piggyback Camera - THE PIGGYBACK PLATFORM
·Astronomy: Piggyback Camera - GUIDING OUT ERRORS
·Astronomy: Piggyback Camera - FILM AND EXPOSURES
·Astronomy: Piggyback Camera - Alignment-PRECISE ALIGNMENT
·Astronomy: Piggyback Camera

  Computer Control: Astronomy: Computer Control - SETTING CIRCLES
Posted on Wednesday, December 01 @ 15:38:51 CST by astronomy
  Computer Control


Most equatorial mounts have numbered dials on each axis. These are manual, or analog, setting circles, and they can be used to locate an object using its right ascension and declination coordinates. However, newcomers to astronomy rarely find setting circles very helpful. The dials require careful adjustments with every use and can quickly lose accuracy as the sky moves during the night.

Computerized, or digital, setting circles, are generally more useful, though more expensive. These devices are programmed with the locations of hundreds, if not thousands, of stars, nebulas, clusters, and galaxies—and even planets on some models. Add-on digital setting circles come with a pair of encoders one tor each axis of the mount. The encoders sense the motion of the mount and keep track of how far it has moved.

Digital setting circles are easy to use and provide a highly accurate method of locating objects. You begin aiming the telescope at two bright stars on either side of the sky. These two positions are all the computer needs to know to guide you to any of the objects in its memory. Call up one of those objects and a display shows which way to swing the telescope and indicates when you are on target. Look in the eyepiece and there the object is!

Digital setting circles can be added to most of today's popular telescopes. Remarkably, they do not need a polar-aligned equatorial mount, and will work , on altazimuth or Dobsonian mounts. Most models sell for the price of a beginner's telescope.




Don't have an account yet? You can create one. As a registered user you have some advantages like theme manager, comments configuration and post comments with your name.

  Related Links

· More about Computer Control
· News by astronomy

Most read story about Computer Control:
Astronomy: Computer Control


  Article Rating

Average Score: 0
Votes: 0

Please take a second and vote for this article:

Very Good



 Printer Friendly Printer Friendly

 Send to a Friend Send to a Friend


Associated Topics

Computer Control

"Login" | Login/Create an Account | 0 comments
The comments are owned by the poster. We aren't responsible for their content.

No Comments Allowed for Anonymous, please register

  Astronomy & Telescope Astronomy

All logos and trademarks in this site are property of their respective owner. The comments are property of their posters, all the rest © 2004 by Astronomy & Telescope Astronomy
You can syndicate our news using the file backend.php or ultramode.txt