Re: [nbos] Star Chart Base Data Release.
Dalton Calford
Mon Jun 13th, 2011
Hi Rob,

Any chance of getting the calculations you used for x,y,z from the RA/Dec?

Also, are there any newer databases available online for star data?

Best regards

Dalton

-----Original Message-----
From: nbossoftware-bounces-at-nbos.com [mailto:nbossoftware-bounces-at-nbos.com] On Behalf Of Robert Graham
Sent: Monday, June 13, 2011 8:03 AM
To: nbossoftware-at-nbos.com
Subject: Re: [nbos] Star Chart Base Data Release.

Mike,

Well basically by and by, the data your seeing there.. is the data that created the 100, 200, 500, 1000, 10000 LY products I put out when Astro 2 came out, hence why in some respects they likely look familiar ;).

You can read it in as a tab-deliminated file but you'll need to modify the file slightly.. you'll need to remove the insert into starchart values (

And take it from a tab deliminated or comma deliminated to being deliminated
by ' ' marks.


But I'll see about doing a mdb dump if I get a chance I can't promise though I've not had a load of time of late and I've been feeling less then above the weather.

-Rob.

-----Original Message-----
From: nbossoftware-bounces-at-nbos.com [mailto:nbossoftware-bounces-at-nbos.com]
On Behalf Of Mike Oliver
Sent: Monday, 13 June 2011 8:13 PM
To: nbossoftware-at-nbos.com
Subject: Re: [nbos] Star Chart Base Data Release.

Cam:

See my on-going correspondence with Rob. I admire your ability to handle the math - I'm not sure I could. I also own the T2300 package and started playing around with the data provided on their tables compared to more "serious" info. I found one or two discrepancies but nothing serious. I got into correspondence with somebody on more or less the same tack that you are taking but I've lost track of it. I'll try to find it and see if any of it looks like it might be useful to you.

Rob's file, imported into Excel as a csv file, looks very much like the Kepner lists I used for my AS2 Star Trek map and my next step is to see if it will go into AS2 with a little juggling.

Cheers,

Mike
www.warmodelling.co.uk


-----Original Message-----
From: nbossoftware-bounces-at-nbos.com [mailto:nbossoftware-bounces-at-nbos.com]
On Behalf Of Cam Kirmser
Sent: 12 June 2011 20:32
To: nbossoftware-at-nbos.com
Subject: Re: [nbos] Star Chart Base Data Release.


> Mike,
>
> If I'm not wrong with out needing an actual MySql or MS sql databse
> you
can
> use Microsoft access to import the file.
>
> -Rob

True, you can. Or, download - what is it, SQL Express? MySQL? Something like that.

I've been working on the same sort of thing, but trying to attach as much as possible to real stars. Then, something most catalogues don't take into account, I adjust for their distance from Earth. In other words, most - if not all - star catalogs, like Hipparcos - give coordinate data for how the star is seen from Earth. Makes sense; after all, the catalog is not a navigation tool, but a viewing tool. So, armed with the star's X, Y, Z data, I then take the star's distance from Earth in LYs and then adjust accordingly using the star's real motion. With that, I then record the actual position of each star, not just the apparent position from Earth.

The problem that arises is that, often, the star's radial velocity is not provided. I've got a database for Traveller, T2300 and Star Trek that, I think, is correct for the local group of 50 LY. It's been about a year since I've worked on it, maybe two, so I'd have to go over it to make sure it's clean. But, I think it is. I've got data for every known star, something like 120,000 records and a bit cumbersome for AS as a whole.


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