08-22-2018, 11:17 PM | #21 |
Join Date: May 2005
Location: Oz
|
Re: Stellar Mapping
The function is probably more practical if you have a significant number of stars. I have a 646-row by 125-column distance table for selected inhabited worlds in my setting, and it's unusable except for MAX and MIN functions and table lookups.
__________________
Decay is inherent in all composite things. Nod head. Get treat. |
08-23-2018, 09:12 AM | #22 |
Join Date: Aug 2010
Location: The Land of Enchantment
|
Re: Stellar Mapping
OK, I'm going through the RECONS list of the 100 nearest stellar systems and is it just me or is Wolf 359 not in the Hipparcos dataset? Googling around, it doesn't seem to have a Hipparcos number. And when I search for various identifiers that I do have (Wolf 359, CN Leonis, GJ 406, distance in parsec) in the XHIP dataset I get nothing. That would kind of undermine my trust.
Annoying, considering that it's the third closest system to ours, and thus often looms large in fiction. Heck, even Star Trek's Federation had The Battle of Wolf 359 versus the Borg. EDIT-- Hmmm, GJ 65 (BL and UV Ceti) and GL 905 are also missing. I suspect that I'm going to find several missing near stars. Which measurements should I consider more accurate? XHIP or RECONS? Both date from 2012, but I think XHIP was just a re-hashing of older data, whereas RECONS claims newer, more accurate data.
__________________
I'd need to get a grant and go shoot a thousand goats to figure it out. Last edited by acrosome; 08-23-2018 at 11:09 AM. |
08-23-2018, 12:48 PM | #23 | |
Join Date: Jul 2008
Location: Munich, Germany
|
Re: Stellar Mapping
Quote:
RECONS is, as I understand it, an ongoing project making new (ground-based) observations; the most recent publications are from this year. So you're probably better off using that, since it will be more complete for the really faint stars. |
|
08-23-2018, 01:00 PM | #24 | |
Join Date: Aug 2010
Location: The Land of Enchantment
|
Re: Stellar Mapping
Quote:
__________________
I'd need to get a grant and go shoot a thousand goats to figure it out. |
|
08-23-2018, 02:59 PM | #25 | |
Join Date: Jul 2008
Location: Munich, Germany
|
Re: Stellar Mapping
Quote:
If you wanted to be really thorough, you could look at the references in Henry et al.'s Table 4, track down those papers, and add the systems listed therein. There's a total of 79 - 13 = 66 systems (not counting brown dwarfs) discovered since the 1995 Yale Parallax Catalog which are not in the Hipparcos catalog -- if you tracked those down and added them to the Hipparcos catalog, you'd be pretty darn close to complete. I can't see any publicly available master database from the RECONS folks, though I imagine they have one. (From skimming the 2018 paper, I get the impression they're waiting for the second Data Release from the Gaia satellite before they publish a proper complete catalog of stars within 10 pc.) |
|
08-23-2018, 03:17 PM | #26 |
Join Date: May 2005
Location: Oz
|
Re: Stellar Mapping
There's a table here of stars with parallaxes that were published in papers by members of RECONS to 12 May 2016. It includes spectral classes where known.
__________________
Decay is inherent in all composite things. Nod head. Get treat. |
08-23-2018, 06:13 PM | #27 | |
Join Date: Aug 2004
Location: Buffalo, New York
|
Re: Stellar Mapping
Quote:
Also, if you're interested in that kind of stuff, there is also the software Astrosynthesis located at... http://www.nbos.com/products/astrosynthesis The nice thing about Astrosynthesis is that it will also show system maps. If you know when a planet will reach its closest approach to the star or its furthest approach to the star, you can modify the database to include that within your files and generate a spiffy system map showing planetary locations at a given date. Heck, I used it to create a system map of the Earth for use with the year 2100 AD for Transhuman Space. <Shrug> |
|
08-23-2018, 07:44 PM | #28 |
Join Date: May 2005
Location: Oz
|
Re: Stellar Mapping
Acrosome said in the original post that he is using Astrosynthesis. The question is one of up-to-date data to use in an Astrosynthesis input file.
__________________
Decay is inherent in all composite things. Nod head. Get treat. |
08-23-2018, 09:10 PM | #29 |
Join Date: Aug 2004
Location: Buffalo, New York
|
Re: Stellar Mapping
|
08-24-2018, 12:43 PM | #30 | |
Join Date: Aug 2010
Location: The Land of Enchantment
|
Re: Stellar Mapping
Quote:
__________________
I'd need to get a grant and go shoot a thousand goats to figure it out. Last edited by acrosome; 08-24-2018 at 12:46 PM. |
|
Tags |
sci-fi, star catalog |
|
|