Now with Scripting for Telescope Automation.
Read the FAQ - or - Find Out What's new -
Visit the RTGUI Facebook Page
Read or Join the RTGUI Group on "groups.io" . (Original RTGUI Yahoo Group is now discontinued.)
Astro Adventure Weekly's Youtube Video explaining how to use RTGUI.
"it ROCKS! It's simple, small, and interfaces to Cartes du Ciel. What more can you ask for?"
- Astronomy author Rod Mollise. Read his review of RTGUI (Acrobat PDF reader is required).
Copyright (c) 2003-2019 by Robert Sheaffer
Free Windows Program - Controls Most
"Goto" Telescopes
Press a button for "Goto", or for an 'Instant Skychart' of the selected
object!
Download
Self-Extracting Archive Program for RTGUI, Version
12 (download size is only about
710k).
If updating to
this new version of RTGUI+S
from an older one, it is not necessary to unpack
the new home location file RTGUI.HOM, saving you the trouble of
re-entering your latitude, longitude, and telescope data. Download
RTGUI, Version 12 as a ZIP
archive.
(Windows Defender or your Browser
may warn that the downloaded
RTGUI file might be “dangerous,” simply because they do not know what
it is. Just ignore this warning, and install it anyway. If you have any
concerns, you can download RTGUI Ver. 12 as a ZIP file, and virus check
the archive. Over 35,000 people have visited this page since 2005, and
no legitimate security issues have ever arisen.)
Read the FAQ - or - Read the program documentation
RTGUI
works well with Mike Swanson's Nexstar Control Pad 
Auxiliary Catalogs:(unzip catalogs into rtgui directory)
Download
Messier Marathon Catalog (3k download, 11k
unzipped. 110 entries). Once a year, in mid to late March, is
it possible for mid-northern observers to see all 110 Messier objects
in a single night's marathon observing session. This catalog contains
all of the Messier objects, in the order that you need to observe them
(whatever sets the soonest is "next"!). There is also a separate
catalog for southern observers, with the visible M-objects ordered for
their search. Just search for "M", and keep hitting "next"! (It's
probably also a good idea to print out the list, for your location
& time.)
Download
Washington Double Star Catalog 1.8 Meg
Download, 8.4 Meg unzipped. Revised Jan. 31, 2006 for compatibility
with new Search Wizard. Includes constellation names for every object.
Complete WDS 2001 catalog, 84,468 entries. Contains virtually every
visual double star known. Don't waste those moonlit nights - observe
thousands of double stars! In addition to the Constellation Names, I
have cross-indexed the WDS with the HR and PPM catalogs, picking up
Bayer (Gam Vir) and Flamsteed (61 Cyg) designations, as well as SAO
numbers, where available. (Entries in the original WDS catalog contain
only the WDS designation, and the DM numbers, so it's hardly
user-friendly.) Separation and magnitude of companion are given, where
available. I know of no other catalog of double stars so complete yet
easy to search. For more information about this catalog, see http://ad.usno.navy.mil/wds.
Download
PPM.ZIP Positions and Proper Motions Star
Catalog in .RTG format ( 9.4 Meg download, 46.7 Meg unzipped. 468,861
entries). Contains all SAO catalog objects, also has PPM
numbers, & HD numbers, now cross-referenced with data in the
Bright Star catalog. Every entry now has a constellation name. ( For
information on the PPM, see http://heasarc.gsfc.nasa.gov/W3Browse/star-catalog/ppm.html
). Catalog is in reverse
order, starting with north polar objects and moving southward. This
also places the smaller SAO and PPM numbers at the start rather than
the end.