Re: [nbos] Astro sector generator feedback
"Dalton Calford"
Tue Dec 29th, 2009
If you post the logic behind what you are doing, I will put it into a firebird SQL database.
Firebird is free, fast and VERY powerful.
We use it for realtime mission critical systems (I work for a phone company and it runs the telco switches).

As AS3 looks to be going the SQL route, it would be easy for me to dump the results directly into the AS file format.

The other benefit is, since I have the servers, I can run the calculations VERY quickly (having a bank of servers in your office has some benefits).

-----Original Message-----
From: nbossoftware-bounces-at-nbos.com [mailto:nbossoftware-bounces-at-nbos.com] On Behalf Of Cam Kirmser
Sent: December 19, 2009 11:39 AM
To: fitzsimons-at-mintel.net; nbossoftware-at-nbos.com
Subject: Re: [nbos] Astro sector generator feedback

I've attached a file that I use to convert RA, Dec and Dist into X, Y, Z and reverse. This collection of functions are for Excel, just paste them into your VBasic editor and enable macros.

The two relevant routines are rectangular() and spherical(). It is important to note that the above two functions are just coordinate conversion routines. They are generic and need two other functions - RA2Deg() and
Deg2RA() - to convert RA to and from degrees (recall that RA is based on a clock with 24 major divisions divided into 60 minutes each of 60 seconds and degrees have 360 degrees, so they need a conversion to and from).

Bear in mind that RA and DEC are equatorial coordinates; in other words, their base plane is coincident with the Earth's equator. If you want your base plane to be the Galactic equator, there are additional conversions to make. But, this is mainly cosmetic. All converting from Equatorial to Galactic does is rotate the axis a mite.

If you want an accurate map, just the RA, Dec and Dist won't be enough. You also need their proper motion and use that data to adjust the X, Y, Z coordinates appropriately according to their distance. Otherwise, you'll just have a position that relates to where they are seen from Earth, not where they actually are. And, for a game with star drives - Traveller, Star Trek, Babylon Five, Ringworld, whatever - each star's ACTUAL position is needed, not their APPARENT position.

I am in the process of making an Access database that will correct the position of each star based upon its proper motion and the time of the individual campaign. This uses a baseline database I found that has about 118,000 entries for 1000ly around Earth using the Hipparcos, Yale and Gliese catalogs. It's slow going because of real life issues, but when I'm finished I can see if it's something that can be attached to an email and post it here. Or, I can see if I can post it to the NBOS download site.

----- Original Message -----
From: "Terry FitzSimons" <fitzsimons-at-mintel.net>
To: <nbossoftware-at-nbos.com>
Sent: Friday, December 18, 2009 5:22 PM
Subject: Re: [nbos] Astro sector generator feedback


>I had started it awhile back but gave up after the third search led to no
> identifiable star.
>
> I was using the kepner_1000lyr_stars.csv and getting the exosolar planets
> data from http://en.wikipedia.org/wiki/List_of_extrasolar_planets and
> http://en.wikipedia.org/wiki/List_of_unconfirmed_exoplanets to be done
> next
> and with http://en.wikipedia.org/wiki/List_of_extrasolar_planet_extremes
> planned on being done last.
>
> The problem that I have is with star named WASP 1, WASP 18, XO3, ect. For
> me to enter them, I need to convert the RA and Dec to something in X,Y,Z.
> Could someone make a converter? Or point me to one that doesn't need a
> thick instruction manual.
>
> I don't have a problem with finding the BD, CPD, CoD, HD, HIP, they are
> all
> in the csv and I can find them once in a while in the stars "Other
> designations" box, but even then it has holes as HIP 7513 isn't listed.
>
> But its going to be a while before I get time to figure out how to do the
> rest.
>
> Terry
>
> On Sat, 12 Dec 2009 04:06:05 +0000, <axldm-at-hotmail.com> wrote:
>
>>
>>Hello all,
>>
>> ... Snip
>>
>>2) Not really a generator question, but I don't suppose anyone has input
>>all known exoplanet data into a real stars dataset..? A bit like painting
>>the Forth Bridge as new data are always coming through, but it would be
>>quite satisfying to have!
>>
>>Marchand
>>
> --
>
> Terry FitzSimons
> fitzsimons-at-mintel.net
>
> _______________________________________________
> Nbossoftware mailing list
>
>
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