This will be a review and overview of the Meade Autostar and Audiostar systems. I will use the Autostar 497 hand control as the example but the features discussed are common to virtually all of the Autostar and Audiostar systems.
The Autostar 497 handset is a computerized telescope control system introduced in the late 1990s by Meade as an upgrade to their ETX telescope line. The ETX 497 hand control could be added to an existing ETX-EC telescope system to create a fully robotic telescope that could find planets and deep-sky objects and then track them as they travel through the sky. Later the Autostar 497 hand control became a standard part of the ETX line with the ETX AT telescopes.
Meade expanded the use of the Autostar hand control and software to offer a wide choice of robotic telescope systems. The early versions of the 497 handsets had over 1000 objects in the database. Over time that increased to over 30,000 objects.
These robotic telescope systems, offered by Meade, Celestron, and others, came to be known generally as “GoTo” systems reflecting the GoTo button on the handset. This is a term still used today to refer to motor-driven computer-operated telescopes. Once the telescope is put through a basic alignment sequence, so it knows where it is on planet Earth, it can find anything in the sky that is contained in its database.
Over the years, Meade has incorporated AutoStar into a variety of hand controls that have been packaged with specific Meade telescope lines. Popular versions of the handset include the Autostar 494 which was standard with the Meade ETX 80 Backpack Observer. The Autostar 495 came with the Meade DS series and the 497, previously mentioned, was for the ETX line. The Autostar II comes with the Meade LX200 series and there are other variations of the handset for full computer control.
Meade recently released the Audiostar system with an updated handset with a built-in speaker to play audio tracks that tell about the planets, deep space objects and stars that are being observed. The Audiostar handsets have over 30,000 celestial objects included in their database. The Autostar II handset included with the Meade LX200 series has over 140,000 objects in its database.
The good thing about the Autostar and Audiostar systems is that they all operate in a very similar fashion. So if you have experience with one, you can operate them all with very little adjustment. I have owned the ETX 60, ETX 80 AT, ETX 80 Observer and the ETX 125 EC with the optional Autostar 497 controller. When I had the opportunity to operate the Meade LX200 14” at the Custer Observatory, it was just like using one of the ETX scopes.
I will go over the capability of the Autostar and Audiostar systems using the Meade 497 handset as an example, but as stated earlier, they all operate in basically the same way. One clear exception is that Audiostar is the only one with sound capabilities in the hand controller.
As seen in the earlier picture, the handset consists of a 2 line screen. Next are three command keys, Enter, Mode, and GoTo. Next, you have 4 direction arrow keys that allow you to move the scope manually. This is followed by a 10 keypad which is used to enter target names or numbers and can also be used to set the slew speed, how fast the telescope moves when you hit the direction keys.
Next, are up and down keys for negotiating menus. And last, but not least, the key which brings up the help system.
The handset is plugged into a port on the telescope. The computer contained in the handset gives commands to the drive motors in the telescope mount and that is how the telescope moves.
The software operation is organized into functional groups that are accessed by menus. There are no commands to memorize. You just select from the menus.
Set-up – This is where you enter the date, time, location. Here is where you identify what model telescope you have, whether daylight savings is active and other details. This information is generally entered once with most models and then retained.
Alignment – This is where you choose what type of alignment you want to do. There are several options. We will review the EASY option later as this is likely to be the most often used.
Object – Here is where you select whether you want to view solar system objects, constellations, deep sky objects, stars, satellites or objects you stored in the handset as you can also enter user objects, things that are custom to you.
Guided Tour – If you don’t know what to look for that night, Autostar will take you to a series of targets so you don’t even have to tell it what you want it to see. Just select Guided Tour and it will take you through a series of showcase targets that are in the sky tonight.
There is a terms glossary. If you are confused by a term, look it up here.
Utilities – This menu will let you set a timer, alarms, set brightness, and similar features. It also has an eyepiece calculator which allows you to enter the focal length of the eyepiece you want to use and it will tell you the magnification it will provide.
Like any computerized system, the quality of information put in will equal the quality of information you get out. In the case of Autostar or Audiostar, the quality of the alignment you do will determine how accurately the telescope can find the targets you want to see.
Easy alignment is so simple. You place the optical tube level and facing North. This is called the home position. This gives the telescope an approximate starting point to determine exactly where it is and where everything in the sky should be.
Power the telescope and the handset will remind you to go to the home position, as described above. Now you select “Easy Alignment”. The Autostar handset now picks a bright star and slews the telescope toward that bright star. It might not hit it exactly, but that is OK. Your job is to use the arrow keys to get that star centered in the eyepiece. Once you do that you hit “Enter”.
The Autostar handset now picks a second bright star and swings the telescope to where it thinks that star should be. Again, usually, it won’t get it exactly right. You use the arrow keys to center that bright star in the eyepiece and hit enter.
The telescope is now aligned. From this point on you enter what you want to see in the handset and Autostar will turn the telescope to find it. Usually, it will be accurate enough to get the star, planet, nebula, globular cluster, galaxy, or whatever it is you entered into the handset, into the field of view of your low power eyepiece.
Once found you can use the arrow keys to make the minor adjustments needed to get that target perfectly centered in the field of view. At this point, the Autostar or Audiostar system will track that target as it moves through the sky.
As a matter of personal experience, I have set my ETX scope on Jupiter, gone into the house to get a drink, and when I came back outside, Jupiter was still in the eyepiece. If this were a manual scope, Jupiter will have moved out of the field of view and I would have to go find it again.
Having a telescope find things for you is great, and having it track them is even better. But where this really shines is where there is a lot of light pollution. The Autostar system can point you at targets in parts of your sky where there are no stars because of light pollution. So, in my opinion, the more light pollution you face the more valuable the Autostar system can be.
Electronically Enhanced Astronomy
This emerging area of astronomy, abbreviated as EAA, uses a video camera to replace the eyepiece. The camera sends the signal to a computer that captures the information. Over time it accumulates light, through a process called stacking. The result is similar to but not exactly like long-exposure astrophotography. With the Autostar system’s ability to track an object you can use this EAA approach to enter the world of astroimaging.
The Autostar system is an advanced computer control system that is used in both entry-level Meade telescope systems and their more advanced systems. There are a variety of handsets but the basic software operation is the same across all of them.
Meade’s Autostar and Audiostar GoTo systems are among the simplest to operate making them perfect for the beginner or the advanced telescope user.