Update 2.121 for COELIX APEX
If you have an older version than 2.115, you must do
a full installation of the current version here.

Also, this update does not work with COELIX LITE. The lite version has its own updates.
To be considered complete, this update of COELIX APEX may require the execution of more than one installation program: main update of the software, update of the orbital elements of comets, update of orbital elements of asteroids, etc.

In each case, the download dialog box of your browser asks if you want to execute immediately or save the installation programs. Choose "Save" to keep a copy, and then run them from your computer.

Complementary updates

Update of the orbital elements of comets and asteroids

Click here to find out how to do the updates of the orbital elements of comets and asteroids.

These updates are necessary to allow COELIX to display accurately the positions of comets and asteroids and calculate precisely the ephemeris of these celestial bodies.

Since the 2.094 version, for several comets and asteroids, Coelix uses the ephemeris calculated by the JPL, taking into account the gravitational perturbations, in order to obtain even greater precision. See here for more information.

Update of the longitude of the Jupiter's Red Spot

The longitude of Jupiter's Red Spot is now equal to
336 according to data from JUPOS.
You can update this value in COELIX in the menu Preferences and settings / Longitude of the Jupiter's Red Spot.

The longitude of the Red Spot varies randomly with time and must be updated several times a year to ensure that the Red Spot appears at the right place on the globe of Jupiter and that the times of its transits are accurate.

Installation of the Guide Star Catalogue

Required to ensure that COELIX APEX can show the stars to magnitude 15.6 in the sky maps of 16X zoom and in the visual fields.

You can install the Guide Star Catalogue if you got COELIX APEX via download and have not yet installed the GSC.
Installation of the GhostScript and GSView programs

The two free programs GhostScript and GSView are necessary to enable COELIX to save the sky maps and the graphic almanac in vectorial PDF format. You will then be able to view and print these maps and almanacs with Acrobat Reader ™.

See help in COELIX to download and install these programs.

Installation of the ASCOM platform

In order to control a motorized telescope with COELIX, you must download and install the ASCOM platform and the driver of the model of the telescope. These free programs are available on the ASCOM Website.

See help in COELIX to install and use ASCOM.
Description of the current update
Galileo project JPL NASA
Version Date Description
2.120 Dec. 24, 2019 Telescope control
Ability to control with COELIX, telescopes modified with the SKYPIKIT project. See the page on the ARDUINO-SKYPIKIT motor control project.
Close encounters of celestial bodies
List a greater number of close encounters of celestial bodies (Moon-planets-stars) in the Graphic Almanac and in the lists of phenomena.
Graphic Almanac
Almanac 2020 available for free LITE version.
Meteor showers
Updating elements of meteor showers for 2020.
Other minor updates and corrections.
Nov. 11, 2018 Comets and asteroids
Significant change in how orbital elements of comets and asteroids are updated as a result of a change in the Minor Planet Center website.
See the Updating Comets and Asteroids page on this site for more details.

Graphic Almanac
Almanac 2019 available for free LITE version.
Meteor showers
Updating elements of meteor showers for 2019.
Other minor updates and corrections.
2.117 Dec. 15, 2017 Comets and asteroids
Ability to calculate and display the ephemeris and trajectories of objects whose orbit is hyperbolic. This can happen for an object that comes from outside the solar system and only passes once. An example is the asteroid 2017 U1 Oumuamua that you can add. An example is given in the help under item Solar System / Comets and Asteroids / Orbiting Elements of an Asteroid.
Update of orbital elements of JPL comets and numbered asteroids (more than 508000).

Visual fields
Adding 83 predefined models of CCD cameras and several models of Canon APN cameras.

View of the Sun-Earth-Moon system
Enlarging the view to better see the phenomena.

Graphic Almanac
Almanac 2018 available for free LITE version.
Meteor showers
Updating elements of meteor showers for 2018.
Other minor updates and corrections.
2.116 March 18, 2017 Tables of the ephemerides of comets and asteroids
Addition of two columns to give the displacement rates in arcsec/hour, in right ascension and declination.
This information can be used by an autoguiding software like PHD2 Guiding when you want to keep a comet motionless on a long exposure photo, but using a star to guide. The PHD2 Guiding software will automatically make corrections to keep the comet motionless during the photo if it knows the rate of displacement of the comet in relation to the stars.

Graphic Almanac
Possibility to choose certain elements to display or not to display.

Comets and asteroids
Update of orbital elements of JPL comets and numbered asteroids (more than 488000).

Zoomed view and visual fields
Possibility of not displaying comets and asteroids.
Increasing reaction speed when clicking on an object in these views to see its properties (especially when choosing to display a large number of asteroids).

The phenomena of the current month
Fixed a bug that could give false positives for simultaneous transits of shadows and/or satellites in front of Jupiter. (Note: there are some of these phenomena expected in May and June 2017).
2.115 Jan. 28, 2017 Bright variable stars
Updating the times of maxima and minima.

List of stars and deep sky objects
Possibility to display a maximum of 6000 lines (was 2000 lines).
Fixed a bug that limited the number of lines displayed.

Observation planner
Fixed a bug in the project "The most beautiful double stars".

Software Installation
Changing the installer. Simplified and faster installation. Smaller file (better compression).
From now on, the installation will be done in the folder C:\NGC7000\CoelixApex\ for the APEX version
or C:\NGC7000\CoelixLite\ for the LITE version.
The program can now be uninstalled with the "Uninstall or modify a program" utility in Windows.
History of the five previous updates
Main update                                            

Follow the instructions of the running installation program. Choose to install the update to the folder that already contains COELIXAPEX, eg C:\NGC7000\COELIXAPEX.

Please submit your personal activation key (include all characters, including the +, the -, the semicolon, etc.): (
Note: the key may be disabled if the update is downloaded to more three different computers).

Version Date Description
2.121 May 3, 2020
3D views   New
Adding a new section allowing to have 3-dimensional views of phenomena using red and cyan 3D glasses.

In this version, you can get an animated view of the movement of the Earth and a comet or an asteroid in their orbits with a real perspective effect. Go to the new section "3D VIEWS".

Bug fix: ephemeris and paths of comets with hyperbolic orbit were not calculated correctly from the orbital elements of the MPC. These comets are rare but the comet C/2020 F8 SWAN visible in 2020 is one of them.

Added very precise ephemeris from JPL Horizon for the following comets in the comethp folder:
C/2019 Y4 ATLAS, C/2020 F8 SWAN, C/2020 F3 NEOWISE, C/2019 U6 LEMMON.
Note 1: You can use this activation key to download and install this update on up to three computers you own.

Note 2: In case of problems, please contact us at the email address given in the Contact page by sending us your activation key in your message.

See below
for improvements, changes and fixes in this update.

Telescope Motorization


See here