Stars Unlimited

[Slink182]

For those who are interested, Stars Unlimited (a T20 subsector/system generator I wrote over last weekend) is now available at eLibrary. Standard UWP format is used, and each system entry has extra notes providing info on other system items (gas giants, hab.zones, etc.).

Hope people find it useful.

Current Project: a T20 world builder/detailer, with integrated animal encounter generator.

 

[Flynn]

Looks great, Slink, but I did notice a few things:

1) It creates WAY too many asteroid belts. I think the size determination may be a little off, somewhere.

2) I'd like it if the output followed the standard *.sec file format, since that's easier to read into Galactic and other software. An example of that format can be found here:
http://www.mu.org/~joe/traveller/archive/General/sectors/

Look inside any of the sector files there, and you should see the format detailed. (For world names, simply use a period '.' for a placeholder.)

3) I'd like it if this could also generate sectors, in addition to subsectors.

Thanks for all the hard work, though,
Flynn

 

[Slink182]

Flynn: I'll look at your asteroid belts comment this weekend. However, the size determination is as the tables dictates, with appropriate modifiers based on system info. The modifiers are all -ve, so with enough system mods, the size gets driven to 0 pretty quickly.

I'm looking at adding an option to allow for a .sec file format to be saved instead, but haven't figured out how to do the file saving routine logically yet. Actual implementation will have to wait until after I get my basic set of tools done.

A full sector generation option will also be on the next go-around.

 

[StuartFerris]

I'm not really familiar with T20 sector generation rules, but was under the impression they were very close to the rulesets in other versions of Traveller.

If this is the case your Atmosphere and Hydrographics routines are a bit flawed resulting in too many low values which in turn is screwing up your Trade Code references.

Nice effort though, as well as extending to sectors how about putting sector maps in place too. You should also consider allowing users to save in HES as well as SEC format

Stuart Ferris
www.heavenandearth2.com

 

[Slink182]

Flynn: The overabundance of asteroid belts in the generation rules are because:

1) Stars have an average of 75% probability of being a red dwarf (V M) - the "M" spectral class is automatically assigned (T20, Star System Development - step 3, pg. 372).
2) Both dwarfs and main sequence stars with an "M" spectral class are automatically assigned a minimum orbit of zero (T20, Star System Development - step 7, pg. 373).
3) Both dwarfs and main sequence stars with an "M" spectral class are automatically assigned a habitable zone of zero (T20, Star System Development - step 7, pg. 373-374).
4) World size is determined by 2d6-2 with an automatic -5 penalty if the world is in orbit zero (T20, World Development - step 2, pg. 375).
5) If the world circles a spectral class "M" star, the world size is modified by an additional -2.

Since the statistical average of 2d6-2 is 5 (3.5 + 3.5 - 2 = 5), then that means that on average over half of all red dwarfs will have an asteroid belt as a "primary" world (modified size = -2, rounded to 0).

The orbit and spectral class modifiers do appear correct when compared to LBB6: Scouts. The code itself checks out clean - it is performing exactly what the tables and rules outline.

The only places I can see where there might be an error in the rules is in the habitable zone assignment (point 3 above). Should the habitable zone for red dwarfs/main sequence stars when they are spectral class "M" automatically be zero, or is this an error that the erratas missed? Because if the T20 tables ARE correct (and barring that I'd overlooked something obvious), then there are a LOT of systems in T20 that have red dwarf stars with asteroid belts listed as their primary main world.

(BTW, the zero Size is having a cascading effect on Atmosphere and Hydrographics, resulting in a lot of SAH values of 000. Someone from QuikLink should take a look at the T20 star generation system to see if the tables are correct. And for the record, I'm using 1st printing with the errata applied.)

 

[StuartFerris]

That being the case I would agree that it is the T20 rules that are flawed. The abundance of low sized planets and the knock-on effects of that on atmosphere and hydrographics doesn't really create an ideal life supporting system.

I think the problem simply stems from the fact that it would appear that 75% of systems are designated Type M using T20. With the modifiers in place this does create an abundance of Planetoid Belts or small sized worlds.

Stuart Ferris
www.heavenandearth2.com

 

[Straybow]

They need to do something other than a flat -5 to planet size in orbit 0. It is very clear from existing exoplanet surveys that planets of any size can exist as close as 0.06 au to the primary (even if they don't form that close to the primary).

Substitute a -1d6 instead.

Larger MV stars are nearly half the mass of Sol, and the mass available for planet formation should not be significantly diminished. Even MV5 stars are nearly a quarter Msol, and unless the system has a Jupiter mass planet hogging all the resources there shouldn't be a penalty (but then, how can you get a Mjup+ planet hogging all the resources… catch 22).

 

[Slink182]

Straybow: The -5 modifier is straight from LLB6. However, I think that the hab.orbit assignment is wrong, or the star size distribution is wrong, or possibly both.

If orbit 0 is a -1d6 (I'd prefer a -1d5), then orbit 1 would likely have a -1d4 and orbit 2 a -1d2 assignment towards world size.

Alt assignments for orbits 0/1/2: -(1d6-1), -(1d5-1) and -(1d2-1).

T20 needs a fix for this problem BAAAAAAD!

 

[Flynn]

I like your alternate ideas, and would like to see what that would produce. Could you make the changes and generate a dense subsector, then post the output here for us to peruse?

Thanks in advance,
Flynn

 

[Slink182]

Originally posted by Flynn:
I like your alternate ideas, and would like to see what that would produce. Could you make the changes and generate a dense subsector, then post the output here for us to peruse?

Thanks in advance,
Flynn

Can do. I'll have it up tomorrow (Tuesday).

 

[Slink182]

Made some modifications to how Stars Unlimited generates stars and mainworld sizes. Below are the results from both mods (apologies for the length of this post):

Mod 1: mainworld sizes are now modified as follows - orbit 0, -(1d6-1); orbit 1, -(1d5-1); orbit 2, -(1d2-1).
Impact: red dwarfs occur at about 78% of the time, vacuum worlds 30% of the time, asteroid belts 21% of the time.
Sample Space: 5 dense subsectors
---- ------------- -------------- ---- --- ------------ --------------------------
Hex UWP Trade Class Zone PBG Stellar Data System Notes
---- ------------- -------------- ---- --- ------------ --------------------------
0101 E000783-4 Na De As 322 M2 V red dwf prim., 2 l.GGs, min.orbit 0, hab.zone 0, main world orbit 0, +0 planets
0102 E0006AA-4 Na Ni De As 631 M5 V red dwf prim., 1 l.GG, min.orbit 0, hab.zone 0, main world orbit 0, +0 planets
0103 A8B6473-D SN Ni 512 F3 Ia lgt.yellow br. super giant prim., binary system, 2 s.GGs, min.orbit 4, hab.zone 11, main world orbit 11, +5 planets
0105 X530204-0 Ni Po De 211 M7 V red dwf prim., 1 l.GG, min.orbit 4, hab.zone 0, main world orbit 4, +2 planets
0106 B31079B-8 Na De 511 F9 V lgt.yellow main seq. prim., 1 s.GG, min.orbit 4, hab.zone 4, main world orbit 4, +4 planets
0107 X600037-0 Ni De Va 911 M6 V red dwf prim., binary system, 1 s.GG, min.orbit 4, hab.zone 0, main world orbit 4, +3 planets
0108 A565446-9 N Ni 511 M4 V red dwf prim., 1 s.GG, min.orbit 4, hab.zone 0, main world orbit 4, +4 planets
0110 A0006A7-E SN Na Ni De As 211 F2 V lgt.yellow main seq. prim., 1 l.GG, min.orbit 4, hab.zone 5, main world orbit 5, +4 planets
0201 E300344-4 Ni De Va 931 M8 V red dwf prim., 1 l.GG, min.orbit 4, hab.zone 0, main world orbit 4, +3 planets
0203 X300022-2 Ni De Va 521 M4 V red dwf prim., trinary system, 1 l.GG, min.orbit 4, hab.zone 0, main world orbit 4, +3 planets
0204 B200756-8 Na De Va 124 M4 V red dwf prim., 3 s.GGs, 1 l.GG, min.orbit 4, hab.zone 0, main world orbit 4, +5 planets
0205 BAA5645-6 Ni A 124 F9 V lgt.yellow main seq. prim., 4 s.GGs, min.orbit 4, hab.zone 4, main world orbit 4, +0 planets
0206 C000551-8 Ni De As 421 M9 V red dwf prim., 1 s.GG, min.orbit 4, hab.zone 0, main world orbit 4, +2 planets
0207 X522232-1 Ni Po 722 M1 V red dwf prim., 2 s.GGs, min.orbit 4, hab.zone 0, main world orbit 4, +0 planets
0208 X300000-4 Ni De Va 123 W1 D white dwf prim., 1 s.GG, 2 l.GGs, min.orbit 4, hab.zone 0, main world orbit 4, +4 planets
0209 X754000-1 Ni 931 M7 V red dwf prim., 1 s.GG, min.orbit 4, hab.zone 0, main world orbit 4, +5 planets
0301 C87756B-6 S Ag Ni A 931 M4 V red dwf prim., binary system, 1 s.GG, min.orbit 4, hab.zone 0, main world orbit 4, +0 planets
0302 B469525-C Ni 132 F0 V lgt.yellow main seq. prim., 2 s.GGs, min.orbit 4, hab.zone 4, main world orbit 4, +0 planets
0303 B322457-C N Ni Po A 934 M4 V red dwf prim., 2 s.GGs, 2 l.GGs, min.orbit 4, hab.zone 0, main world orbit 4, +0 planets
0304 E425102-6 Ni 434 M6 V red dwf prim., 1 s.GG, 3 l.GGs, min.orbit 4, hab.zone 0, main world orbit 4, +0 planets
0305 X500003-4 Ni De Va 114 M9 V red dwf prim., binary system, 2 s.GGs, 2 l.GGs, min.orbit 4, hab.zone 0, main world orbit 4, +3 planets
0306 C300322-A Ni De Va 814 M6 V red dwf prim., 1 s.GG, 3 l.GGs, min.orbit 4, hab.zone 0, main world orbit 4, +0 planets
0307 X866105-0 Ni 314 M7 V red dwf prim., 2 s.GGs, 2 l.GGs, min.orbit 4, hab.zone 0, main world orbit 4, +4 planets
0309 X945005-1 Ni 811 W5 D white dwf prim., 1 l.GG, min.orbit 4, hab.zone 0, main world orbit 4, +2 planets
0310 A100646-C SN Na Ni De Va 112 M3 V red dwf prim., binary system, 1 s.GG, 1 l.GG, min.orbit 4, hab.zone 0, main world orbit 4, +0 planets
0402 X000003-3 Ni De As 612 M4 V red dwf prim., 2 l.GGs, min.orbit 4, hab.zone 0, main world orbit 4, +3 planets
0405 X300222-2 Ni De Va 915 M2 V red dwf prim., binary system, 2 s.GGs, 3 l.GGs, min.orbit 4, hab.zone 0, main world orbit 4, +3 planets
0408 X300035-0 Ni De Va 811 M6 V red dwf prim., binary system, 1 s.GG, min.orbit 4, hab.zone 0, main world orbit 4, +0 planets
0409 E410144-8 Ni De 911 M1 V red dwf prim., binary system, 1 s.GG, min.orbit 4, hab.zone 0, main world orbit 4, +3 planets
0410 X310200-5 Ni De R 212 M7 V red dwf prim., 2 s.GGs, min.orbit 4, hab.zone 0, main world orbit 4, +4 planets
0503 C000340-8 S Ni De As 911 F5 V lgt.yellow main seq. prim., 1 l.GG, min.orbit 4, hab.zone 6, main world orbit 6, +2 planets
0504 B446433-B Ni 611 F1 V lgt.yellow main seq. prim., 1 l.GG, min.orbit 4, hab.zone 4, main world orbit 4, +5 planets
0505 X521221-1 Ni Po A 122 M5 V red dwf prim., 1 s.GG, 1 l.GG, min.orbit 4, hab.zone 0, main world orbit 4, +4 planets
0506 X000365-4 Ni De As A 122 M4 V red dwf prim., binary system, 1 s.GG, 1 l.GG, min.orbit 4, hab.zone 0, main world orbit 4, +0 planets
0507 X300003-4 Ni De Va 921 M4 V red dwf prim., 1 l.GG, min.orbit 4, hab.zone 0, main world orbit 4, +3 planets
0508 X000221-1 Ni De As 721 M6 V red dwf prim., 1 s.GG, min.orbit 4, hab.zone 0, main world orbit 4, +4 planets
0509 X200220-2 Ni De Va 721 M5 V red dwf prim., 1 s.GG, min.orbit 4, hab.zone 0, main world orbit 4, +5 planets
0510 A624421-9 N Ni 621 M6 V red dwf prim., 1 l.GG, min.orbit 4, hab.zone 0, main world orbit 4, +5 planets
0601 X000000-4 Ni De As 722 M7 V red dwf prim., 2 l.GGs, min.orbit 4, hab.zone 0, main world orbit 4, +4 planets
0602 X000100-5 Ni De As R 521 M9 V red dwf prim., 1 s.GG, min.orbit 4, hab.zone 0, main world orbit 4, +7 planets
0603 C100445-7 S Ni De Va A 321 F7 V lgt.yellow main seq. prim., 1 s.GG, min.orbit 4, hab.zone 6, main world orbit 6, +1 planet
0604 A400744-B Na De Va 711 K0 III orange giant prim., 1 l.GG, min.orbit 5, hab.zone 8, main world orbit 8, +8 planets
0608 X600230-0 Ni De Va 115 M9 V red dwf prim., 4 s.GGs, 1 l.GG, min.orbit 5, hab.zone 0, main world orbit 5, +3 planets
0609 X000120-1 Ni De As 612 M2 V red dwf prim., binary system, 2 l.GGs, min.orbit 5, hab.zone 0, main world orbit 5, +2 planets
0610 C400246-A Ni De Va 212 W0 D white dwf prim., binary system, 1 s.GG, 1 l.GG, min.orbit 5, hab.zone 0, main world orbit 5, +6 planets
0702 B20048A-D SN Ni De Va 712 M9 V red dwf prim., 2 l.GGs, min.orbit 5, hab.zone 0, main world orbit 5, +3 planets
0703 B200323-A SN Ni De Va 411 G3 V yellow main seq. prim., binary system, 1 s.GG, min.orbit 5, hab.zone 3, main world orbit 5, +3 planets
0707 D510352-4 Ni De R 413 M3 V red dwf prim., 3 s.GGs, min.orbit 5, hab.zone 0, main world orbit 5, +3 planets
0708 X100004-3 Ni De Va A 333 M0 V red dwf prim., binary system, 2 s.GGs, 1 l.GG, min.orbit 5, hab.zone 0, main world orbit 5, +1 planet
0709 X200231-0 Ni De Va 613 M4 V red dwf prim., binary system, 2 s.GGs, 1 l.GG, min.orbit 5, hab.zone 0, main world orbit 5, +1 planet
0801 E320310-6 Ni Po De 111 M0 V red dwf prim., binary system, 1 l.GG, min.orbit 5, hab.zone 0, main world orbit 5, +6 planets
0802 E33068A-7 Na Ni Po De 911 M5 V red dwf prim., 1 s.GG, min.orbit 5, hab.zone 0, main world orbit 5, +3 planets
0803 X000000-5 Ni De As 321 M5 V red dwf prim., binary system, 1 s.GG, min.orbit 5, hab.zone 0, main world orbit 5, +1 planet
0806 X300000-3 Ni De Va 112 M5 V red dwf prim., binary system, 2 l.GGs, min.orbit 5, hab.zone 0, main world orbit 5, +5 planets
0807 X510225-2 Ni De R 612 M5 V red dwf prim., binary system, 1 s.GG, 1 l.GG, min.orbit 5, hab.zone 0, main world orbit 5, +7 planets
0808 X000301-7 Ni De As 522 M8 V red dwf prim., 2 l.GGs, min.orbit 5, hab.zone 0, main world orbit 5, +2 planets
0809 C542489-6 Ni Po 822 M8 Ib red weak super giant prim., 1 s.GG, 1 l.GG, min.orbit 8, hab.zone 12, main world orbit 12, +1 planet


Mod 2: mainworlds are modded as Mod 1, but changed occurence rate of red dwarfs to 50%
Impact: red dwarfs occur at about 51% of the time, vacuum worlds 23% of the time, asteroid belts 18% of the time.
Sample Space: 5 dense subsectors
---- ------------- -------------- ---- --- ------------ --------------------------
Hex UWP Trade Class Zone PBG Stellar Data System Notes
---- ------------- -------------- ---- --- ------------ --------------------------
0101 E000889-6 Na De As 602 M8 V red dwf prim., binary system, 1 s.GG, 1 l.GG, min.orbit 0, hab.zone 0, main world orbit 0, +2 planets
0103 A10088A-D Na De Va 914 M0 V red dwf prim., 3 s.GGs, 1 l.GG, min.orbit 0, hab.zone 0, main world orbit 0, +5 planets
0104 B355486-7 Ni 912 B5 V lgt.blue main seq. prim., 1 s.GG, 1 l.GG, min.orbit 0, hab.zone 12, main world orbit 12, +4 planets
0105 X310333-1 Ni De 312 M1 V red dwf prim., 1 s.GG, 1 l.GG, min.orbit 0, hab.zone 0, main world orbit 0, +0 planets
0106 X100510-2 Ni De Va 722 F4 V lgt.yellow main seq. prim., 1 s.GG, 1 l.GG, min.orbit 0, hab.zone 5, main world orbit 5, +1 planet
0108 C3336AC-5 Na Ni Po 721 M5 V red dwf prim., 1 s.GG, min.orbit 0, hab.zone 0, main world orbit 0, +4 planets
0109 A652653-9 Ni Po 621 M7 V red dwf prim., 1 l.GG, min.orbit 0, hab.zone 0, main world orbit 0, +2 planets
0110 X578013-0 Ni 321 M5 V red dwf prim., binary system, 1 l.GG, min.orbit 0, hab.zone 0, main world orbit 0, +6 planets
0201 C564579-6 S Ag Ni 411 B4 V lgt.blue main seq. prim., binary system, 1 l.GG, min.orbit 0, hab.zone 12, main world orbit 12, +1 planet
0203 X000002-2 Ni De As 811 M5 V red dwf prim., 1 s.GG, min.orbit 0, hab.zone 0, main world orbit 0, +1 planet
0204 X8A6154-1 Ni 311 F9 V lgt.yellow main seq. prim., binary system, 1 s.GG, min.orbit 0, hab.zone 4, main world orbit 4, +4 planets
0205 X8546A8-0 Ag Ni 922 W4 D white dwf prim., binary system, 1 s.GG, 1 l.GG, min.orbit 0, hab.zone 4, main world orbit 4, +1 planet
0206 E225335-7 Ni 622 M0 V red dwf prim., 2 l.GGs, min.orbit 0, hab.zone 0, main world orbit 0, +1 planet
0207 X000122-2 Ni De As A 111 M3 V red dwf prim., 1 s.GG, min.orbit 0, hab.zone 0, main world orbit 0, +7 planets
0209 C000458-A Ni De As 821 M3 V red dwf prim., 1 s.GG, min.orbit 0, hab.zone 0, main world orbit 0, +1 planet
0302 A100866-E Na De Va 925 M4 V red dwf prim., 3 s.GGs, 2 l.GGs, min.orbit 0, hab.zone 0, main world orbit 0, +0 planets
0303 E322568-8 Ni Po 411 M5 V red dwf prim., 1 s.GG, min.orbit 0, hab.zone 0, main world orbit 0, +4 planets
0305 B7B6569-8 Ni 513 M3 V red dwf prim., binary system, 1 s.GG, 2 l.GGs, min.orbit 0, hab.zone 0, main world orbit 0, +0 planets
0306 B731344-B N Ni Po A 411 F7 V lgt.yellow main seq. prim., 1 l.GG, min.orbit 0, hab.zone 4, main world orbit 4, +3 planets
0307 C879335-A Ni 811 M9 III red giant prim., 1 l.GG, min.orbit 6, hab.zone 8, main world orbit 8, +5 planets
0308 E766851-2 Ri 311 F6 V lgt.yellow main seq. prim., 1 l.GG, min.orbit 6, hab.zone 6, main world orbit 6, +3 planets
0309 A400400-D N Ni De Va 511 M8 V red dwf prim., binary system, 1 s.GG, min.orbit 6, hab.zone 0, main world orbit 6, +8 planets
0310 E644377-6 Ni 112 F2 V lgt.yellow main seq. prim., binary system, 1 s.GG, 1 l.GG, min.orbit 6, hab.zone 5, main world orbit 6, +3 planets
0401 E961332-6 Ni 611 G5 V yellow main seq. prim., 1 l.GG, min.orbit 6, hab.zone 4, main world orbit 6, +6 planets
0402 C500464-5 Ni De Va 312 K2 V orange main seq. prim., binary system, 2 s.GGs, min.orbit 6, hab.zone 4, main world orbit 6, +3 planets
0406 X000011-4 Ni De As 812 M9 V red dwf prim., 2 s.GGs, min.orbit 6, hab.zone 0, main world orbit 6, +0 planets
0408 C400645-6 S Na Ni De Va 311 M9 V red dwf prim., 1 s.GG, min.orbit 6, hab.zone 0, main world orbit 6, +5 planets
0409 E200363-4 Ni De Va 411 M0 V red dwf prim., binary system, 1 l.GG, min.orbit 6, hab.zone 0, main world orbit 6, +2 planets
0410 C354446-6 Ni 432 F4 V lgt.yellow main seq. prim., 2 s.GGs, min.orbit 6, hab.zone 6, main world orbit 6, +0 planets
0501 X300000-4 Ni De Va 131 F1 V lgt.yellow main seq. prim., binary system, 1 l.GG, min.orbit 6, hab.zone 5, main world orbit 6, +3 planets
0502 X310000-1 Ni De A 811 M0 V red dwf prim., 1 l.GG, min.orbit 6, hab.zone 0, main world orbit 6, +6 planets
0503 X600024-1 Ni De Va 311 M5 V red dwf prim., binary system, 1 l.GG, min.orbit 6, hab.zone 0, main world orbit 6, +2 planets
0504 X710045-0 Ni De 513 W8 D white dwf prim., binary system, 2 s.GGs, 1 l.GG, min.orbit 6, hab.zone 0, main world orbit 6, +4 planets
0505 C100333-7 Ni De Va 911 M1 V red dwf prim., binary system, 1 l.GG, min.orbit 6, hab.zone 0, main world orbit 6, +7 planets
0506 X400023-2 Ni De Va A 412 G4 V yellow main seq. prim., binary system, 2 l.GGs, min.orbit 6, hab.zone 2, main world orbit 6, +6 planets
0507 C764643-8 Ag Ni Ri 912 M0 V red dwf prim., binary system, 2 l.GGs, min.orbit 6, hab.zone 0, main world orbit 6, +0 planets
0508 X200046-4 Ni De Va 111 M7 V red dwf prim., 1 l.GG, min.orbit 6, hab.zone 0, main world orbit 6, +6 planets
0509 X120001-1 Ni Po De 812 M0 V red dwf prim., binary system, 2 l.GGs, min.orbit 6, hab.zone 0, main world orbit 6, +4 planets
0510 B600578-7 S Ni De Va 332 F3 V lgt.yellow main seq. prim., 1 s.GG, 1 l.GG, min.orbit 6, hab.zone 5, main world orbit 6, +4 planets
0601 E764688-4 Ag Ni Ri 114 M3 V red dwf prim., 1 s.GG, 3 l.GGs, min.orbit 6, hab.zone 0, main world orbit 6, +1 planet
0602 X210155-3 Ni De 612 G4 V yellow main seq. prim., 2 l.GGs, min.orbit 6, hab.zone 2, main world orbit 6, +3 planets
0604 X764320-0 Ni 411 F0 V lgt.yellow main seq. prim., 1 s.GG, min.orbit 6, hab.zone 4, main world orbit 6, +6 planets
0605 C300310-B Ni De Va 122 M1 V red dwf prim., 1 s.GG, 1 l.GG, min.orbit 6, hab.zone 0, main world orbit 6, +1 planet
0606 B667565-A S Ag Ni 922 K8 II orange br. giant prim., 1 s.GG, 1 l.GG, min.orbit 5, hab.zone 7, main world orbit 7, +0 planets
0607 E253300-6 Ni Po 422 A8 V white main seq. prim., binary system, 1 s.GG, 1 l.GG, min.orbit 5, hab.zone 6, main world orbit 6, +1 planet
0608 X300005-3 Ni De Va 112 M9 V red dwf prim., 1 s.GG, 1 l.GG, min.orbit 5, hab.zone 0, main world orbit 5, +1 planet
0703 C000659-B Na Ni De As 823 M0 V red dwf prim., 3 l.GGs, min.orbit 5, hab.zone 0, main world orbit 5, +0 planets
0704 X200012-0 Ni De Va A 223 M2 V red dwf prim., 1 s.GG, 2 l.GGs, min.orbit 5, hab.zone 0, main world orbit 5, +4 planets
0705 C320346-6 Ni Po De 712 M2 V red dwf prim., 1 s.GG, 1 l.GG, min.orbit 5, hab.zone 0, main world orbit 5, +3 planets
0706 X400000-2 Ni De Va 112 M7 V red dwf prim., 1 s.GG, 1 l.GG, min.orbit 5, hab.zone 0, main world orbit 5, +6 planets
0708 B520650-B Na Ni Po De 812 F1 V lgt.yellow main seq. prim., trinary system, 2 s.GGs, min.orbit 5, hab.zone 6, main world orbit 6, +6 planets
0710 C653259-A S Ni Po 812 K9 V orange main seq. prim., binary system, 2 l.GGs, min.orbit 5, hab.zone 3, main world orbit 5, +5 planets
0801 A59C673-8 Ni Wa A 222 F8 V lgt.yellow main seq. prim., binary system, 2 s.GGs, min.orbit 5, hab.zone 6, main world orbit 6, +0 planets
0802 D000442-8 S Ni De As 722 W7 D white dwf prim., 2 s.GGs, min.orbit 5, hab.zone 6, main world orbit 6, +3 planets
0804 X500100-3 Ni De Va 721 M1 V red dwf prim., 1 l.GG, min.orbit 5, hab.zone 0, main world orbit 5, +0 planets
0806 D75178B-5 Po 321 G0 V yellow main seq. prim., 1 l.GG, min.orbit 5, hab.zone 2, main world orbit 5, +1 planet
0808 X300000-5 Ni De Va 821 M7 V red dwf prim., binary system, 1 l.GG, min.orbit 5, hab.zone 0, main world orbit 5, +5 planets
0809 C510232-9 Ni De 521 M3 V red dwf prim., 1 l.GG, min.orbit 5, hab.zone 0, main world orbit 5, +2 planets
0810 X230012-0 Ni Po De 114 M8 V red dwf prim., binary system, 3 s.GGs, 1 l.GG, min.orbit 5, hab.zone 0, main world orbit 5, +2 planets


Off-hand, I would have to say that the 75% occurence rate of the red dwarfs (V M) are seriously messing up the T20 system generation system. The move to a 50% occurence rate was a guess based on what I eyeballed from LLB6.

Comments?

 

[Vargas]

The test runs I did generated a lot of worlds with E and X Class 'ports.

 

[Flynn]

Definitely a lot more variety from each of these than we saw in the previous release. You may consider allowing a configuration to be set by the Referee, for choosing which options he'd like to set for the creation of random subsectors/sectors.

Now, what does it look like if you drop the orbit mods all together?

Thanks,
Flynn

 

[Slink182]

Flynn: Yes, I have to agree. I personally think that the high number of red dwarfs, and the associated mainworld assignments/modifiers, is causing a lot of asteroid belts to be generated. Maybe the occurence of red dwarfs is "correct" with real occurence levels (as opposed to what we knew 25 years ago), but having that reflected in the system generation system pretty much makes Canon level sectors/subsectors next to impossible (ultra-high level of asteroid belts).

I'd like to know if anyone has encountered this problem if they generated a subsector by hand (system and mainworld) according to the rules. I can't be bothered - I mean, that's why I WROTE the program.

Vargas: I believe that there are modifiers on starports based on mainworld data - and mainworld data generation is kind of wonked (my opinion).

But if you think about it, a lot of systems that have asteroid and vacuum mainworlds will likely have only the barest facilities for starships.

 

[Straybow]

Size adjustment doesn't need to be linear. For a hand-rolled system I'd use a 2d6 table.

2-5 no change
6-7 -1 size
8-9 -2
10 -3
11 -4
12 -5

That gives percentages of 28/31/25 for 0/-1/-2 and 1 in 6 for higher reduction.

Use a -1 on the roll for orbit 1, -2 for orbit 2. Of course, for a computer program you can throw in any distribution you want.

 

[Malenfant]

As I pointed out on the other thread on the T20 Q&A board:

Book 6 actually says (on page 33, step 4C):

"If size 0-, use S"

I dunno if T20 has that, but S is the size code for a world that is a couple of hundred km in diameter (it says 200 km, but I just assume it's less than 500 miles (800 km) in diameter).

So if you use that, you'll have an over abundances of tiny rockballs in close orbits around M stars instead of asteroid belts, which may be a bit more reasonable. The 75% probability of the star being an M V is about right though.

Using the basic UWP system from book 3 or 6 doesn't factor in orbit position or star type, so it's possible to generate worlds that don't agree with the Type M limitations despite the fact that the planet orbits one.

 

[Flynn]

Malenfant,

Size "S" is not used for Mainworlds, only for secondary worlds. It could be that T20 is missing a line that indicates the same thing, which woul bring it back in line with CT's Book 6.

Something else to add to errata...

-Flynn

 

[Malenfant]

I've replied on the T20 Q&A board, just so the discussion can continue in one place. Though I think I did find a possible RW reason for asteroid belts in close orbits around M V stars, described there