Tag Archive for 'update'

[2300AD] Realistic Star Map Project Update #2 (corrected American Arm!)

Yes, it’s another update! After I did the last update to the French and Chinese Arms, I was pointed to some new data that changed the locations for some of the Brown Dwarfs used here. Most of the affected BDs shifted only slightly (not enough to change their positions in the subway map), but a few of them did change significantly, and one of the ones that moved significantly was WISE J1541-2250, whose location changed from being about 9 ly from Sol to being 44 ly away! Unfortunately, that was one of the systems at the start of the American Arm so an update was required for the American Arm – now the American Arm is back to sharing its first few systems with the Chinese Arm. All of the changes that resulted from the new data are described below:

– Since WISE J1541-2250 is no longer in the right place, the American Arm now starts at Sol and then follows the Chinese Arm through Alpha Centauri (Tirane), Barnard’s Star, Ross 154 and AX Microscopii. Serurier is now at Ross 154 (as it is in canon), and Broward is now at AX Microscopii. The American Arm now continues through the binary brown dwarf system SCR 1845-635(7), the very young red dwarf Gliese 674, and then rejoins the rest of the Arm at 36 Ophiuchi (DM -26 12026).

– As a result of these changes, Broward is no longer located at Wolf 1061, and Wolf 1061 is no longer considered part of the American Arm (though it is still accessible from it). Serurier is similarly no longer at WISE J1049-5319 (though that system is still on the French Arm and is now just a waystation on the way to Nyotekundu).

Ross 458 has been removed from one end of the Pentapod Arm, since it is now out of range because of the new data – the Pentapod Arm now ends at Gliese 516 A.

– The brown dwarf WISEPA J1828+2650 is no longer located between Mu Herculis (Hermes) and Gliese 745 (the BD is now out of range and further away from Sol). This means that a Stutterwarp Tug is necessary to access Gliese 745 from Mu Herculis, and then from Gliese 745 another Stutterwarp Tug is required to reach Gliese 748 in the Beta Aquilae Cluster. This makes it somewhat harder to reach the Cluster, since there are no longer any brown dwarfs to bridge even part of the distance to it.

– The subway maps for all three Arms have been updated with these changes, so be sure to check them again!

– There is also now a “secret route” between the Antares and Beta Canum branches of the French Arm. I haven’t shown this route on the French Arm subway map because it’s not actually terribly useful, but I mention it here for completeness. The route goes from Gliese 518 on the Antares branch to Gliese 486 to WISEP J1217+1626 (a new Brown Dwarf) to Gliese 436 to (61 Ursae Majoris, Gliese 450, and Xi Ursae Majoris). The star Denebola can also be reached directly from J1217+1626. I originally thought that the existence of this new route might allow the Kafers to reach to Beta Canum to attack it during their invasion of human space, but it’s very unlikely that they would be able to actually locate such a dim object with their technology. It could allow a human force to travel between the arms, however.

You can check out the updated American Arm here: http://evildrganymede.net/wp/2013/09/09/2300ad-realistic-star-map-project-part-iv-the-new-american-arm/.

Hopefully this will be the last update to this 2300AD Realistic Star Map Project – I don’t intend to make any further changes or additions unless there’s something really major to update (new brown dwarfs near Sol, radically updated distance etc)!

[2300AD] Realistic Star Map Project Update (corrected French and Chinese Arms!)

tl;dr version: I inadvertently placed a Brown Dwarf near Sol in the wrong position on the Realistic Star Maps, which messed up the start of the French and Chinese Arms. But I’ve now fixed that and made a few other changes too, so be sure to check the updated pages!

The long version: A commenter here (thanks, Schutze!) pointed out that I’d made an error in the location of the brown dwarf WISE J1049-5319, which I previously placed at the start of the French and Chinese Arms. It turned out that I had used the Co-ordinate Converter from my Stellar Mapping page to calculate the location of that one system, but I’d forgotten to convert from the Galactic XYZ co-ordinates that it outputs into the Astrosynthesis XYZ format – so it ended up in the wrong place since everything around it was (correctly) in Astrosynthesis XYZ co-ordinates. There shouldn’t be any more errors like that in the maps – I’m pretty sure that was the only system for which I could have used the Galactic co-ordinates since everything else was converted using the Bulk Converter spreadsheet (which explicitly has Astrosynthesis XYZ columns that I copy the values from).

As a result, J1049-5319 was placed on the map in the wrong position, and fixing that really changed the start of the French Arm and somewhat changed the start of the Chinese Arm too. On the plus side though, the correct position of the J1049-5319 bridged the gap between Sol and Wolf 359 so that actually fixed that issue with the French Arm, and the new position also meant that the start of the Chinese Arm was more like it was in 2300AD canon.

Aside from the changes to the start of the French and Chinese Arms (involving the addition, removal and/or re-ordering of some systems), I’ve also significantly revamped Kafer Space by moving the Kafer homeworld to Psi Serpentis and adding a fictional Brown Dwarf between Psi and Lambda Serpentis, for reasons explained on the updated New French Arm page (it makes more sense like this now, and actually allows the Kafers to access human space!).

I’ve now updated the maps and descriptions on the New French Arm and New Chinese Arm posts, and also updated the Overview and Introduction posts to make all the preamble consistent (the New American Arm is unaffected by this, so it remains as it was).

So please be sure to check out the updated pages for the corrected information, and I’m sorry for missing that!