CNebulaX - FAQ: Frequently Asked Questions


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José R. Torres

 

If you do not find the answer you need, send me an email and I will answer you as soon as possible

 

 

I have just installed the program and I am getting a runtime error. What is going wrong?

You are likely installing an old release. New setup files and updates are available in the website. The runtime error happened with the old setup files created with the Microsoft Application & Deployment wizard from Visual Studio 6. New setup files created with Microsoft Windows Installer do not present runtime errors and are installed without any problem to my knowledge. Please, report me any setup error.

 

Be sure that you are not trying to update an old release of the program (Windex, SkyIndex or a release of CNebulaX 1.04 or older) by copying the CNebulaX.exe file in the program folder. That is not enough: you should uninstall the old release, installing then the new release. I advise you to make a full update to the new release, since the changes, corrections and new features make it highly recommend.

 

 

The map shows meaningless characters (screen font), and I cannot read anything

Grab the new release. No errors have been reported up to now with the new setup files. Please, report me any error you could have in this sense.

 

 

I need some help to learn how to use the program

Have a look to the new handbook. The major update 1.05.59 includes new help files. Consult me any doubt you could have.

 

 

I want more databases. How can I get the maps I see in the web?

You need to install the additional databases AND the latest CNebulaX exe file. All those files are linked is in the complements webpage. Just unzip the database files in the specified directories.

 

 

How can I display photos?

The 1.03 release (and later) can display pictures, provided some cautions are kept:

            The allowed formats are GIF or JPG

            Each file name should coincide with the respective object name in the database without spaces: A file for "PK 164+31.1" could be "PK164+31.1.JPG", and "NGC7331.JPG" is a graphic file for NGC 7331

            The files should be properly stored in the folders indicated in Setup/Config/Files tab

 

 

How do the image folders work?

Three categories of image folders are established:

            IMAGEDB - the root main image folder, which contains several subfolders, one for each object class (OPNCL, GLOCL, GALXY, CL+NB, PLNNB, BRTNB, etc). A given object file should be stored according to its class in the respective subfolder (e.g., "M 97" within PLNNB, "M 31" within GALXY, etc)

            USERDB - the user database folder. It is a special folder that can contain unclassified graphic files (without subfolders). It is not recommended to use this folder to store all images since it would slow down the program. However, it can be used for storing a "small" collection (i.e., less than one thousand)

            DSS - The Digital Sky Survey files. If the NGC/IC project has been downloaded for offline browsing and the location of the DSS subfolder properly specified in the Setup/Config/Files tab, the program will display the pictures.

 

Since the NGC/IC project represents a thorough revision of NGC and IC objects. I have given to DSS higher hierarchy for being displayed. So, the order is: (1) DSS, (2) IMAGEDB, and (3) USERDB. The displayed image corresponds to the first file found following this sequence. There are other special folders/subfolders (i.e., PGC) in my personal release.

 

The colors are not well displayed in my screen, and I need more/less stars in my screen

The program is being developed in a 3GHz notebook at 1024x768 resolution and 32M colors. Blue colors, which are shown nicely soft in my TFT screen, appear often too dark in plasma screens. You should customize the display to your screen to get a proper representation for your computer:

         ● COLORS:  Go to the Setup/Colours tab and change the map background to a dark value, and the MilkyWay to a slightly brighter one with the same hue. The faintest stars in the 1.04 release are dots to avoid cluttering, so select a star background bright enough to allow showing them (a mid or bright gray is quite good). In the 1.03, the faintest stars are small circles, so a dark gray works better.

         ● STARS:   Go the Main tab and find the boxes labeled as "m-object", "r-offset" and "level":

                              m-offset: magnitude offset to be added to the automagnitude value. If you want less stars, put a negative value (e.g., ‑0.5) and if your screen is larger and you want more stars, put a positive value (e.g, +0.5)

                              r-offset: radius offset that make the stars appearing larger. Introduce a value larger than zero (e.g., +0.5) to enlarge stars, and a negative one (e.g, ‑0.5) to make them smaller

                              Level: contrast value, that make the progression in bright soft or more sudden (a value form 1 to 10). A mid value (5) gave a nearly linear increment in star radius.

 

What has happened with the MSDOS release?

It is obsolete. The latest distributed release (4.2) is not compatible anymore with the new database files, so I had to update it (4.3rs) to make it able to display the GSC and new databases. However, memory limitations under MSDOS emulators prevent me introducing more improvements that are needed. Thus, I have decided to stop its public distribution: the windows version is nowadays able to perform nearly equivalent tasks without memory limitations, so let's go ahead with the new one.

 

 

I lost the latitude/longitude settings when I close the program (or the eyepiece list)

This was a bug fixed in the 1.04 release; update the program and install the current release

 

 

How much space do I need for a full setup?

The minimal installation requires, besides the windows controls and visual basic 6 runtime files, around 45 Mb: the program and auxiliary files (2 Mb), Tycho II star database (12-16 Mb), the first section of the GENERAL database (7 Mb) and the help files (25 Mb).

The full installation add to these the Guide Star Catalogue 1.2 as star database extension (120 Mb) and some deep sky catalogues: Galaxies (50 Mb including HyperLEDA), variable stars (15 Mb), double stars (21 Mb) and other nonstellar objects (14 Mb). This means around 220 Mb , so 265 Mb is what a full installation with the complete GSC and 1,250,000 deep sky objects would require. There are also some other minor databases and auxiliary programs as well.

The image collection can be as huge as one wishes. I have around 150,000 files occupying around 1Gb, but a quite good image collection (NGC/IC project) can be stored in 200 Mb.

To sum up, a very good installation with a power similar to Guide or the Sky would require 265 Mb (500 Mb including images).

 

All the files you need (with the exception of images) are in the download and complements webpages.

 

 

I want the program in another language (e.g., Spanish)

I am not in conditions to tackling it. Translating CNebulaX would be too hard and time-consuming, and I have no help of other people. I think that people using the program will really prefer having new features implemented, that loosing them for having the program translated instead. I developed CNebulaX in English (instead of Spanish, my native language) with the intention of helping people of other countries.

 

I have read in some webs negative connotations on this, but sincerely, they are wrong. If CNebulaX would be a professional project with earning intentions and a team was working on it, the translation would be essential. Unfortunately, I am guy working alone and investing my free time with no compensations.

 

 

 

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