T5 Worldbuilding question

[Drakon]

I am trying my hand at worldbuilding for the Lemish system. I figure the first step is to get as much survey data as possible.

Hex Name UWP Remarks {Ix} (Ex) [Cx] N B Z PBG W A Stellar
1808 Lemish A79568C-C Ag Ni Cp { 2 } (956+2) [988F] BCF N 101 8 Im M1 V M2 V

Second survey data indicates there are two stars, an M1V, and an M2V. But it does not indicate their relative orbits. Lemish is in the habitable zone, but for either star, that is Orbit Zero. And even both stars together, the habitable zone is still only orbit zero.

I am not sure how to use the table on page 436 Table 1.

 

[arentol]

I am not entirely sure where you got the second survey data for that system. Did you generate it yourself, or find a resource online for the stuff not directly determinable from the UWP?

Regardless, I can tell you how to use Pg. 436, Table 1.

Roll Flux Three times, once on column C, once on Column N, and once on column F. If any result is +3, +4, or +5 then there is a second star in that orbit zone. For each star that is present (Prime a/o C, N, F) roll Flux on the Companion column to determine if there is a companion to that star (another star inside orbit 0 of that given star). Once you determine the stars and companions present go to Table 3 to determine the C, N, and F orbit relative to the primary for each star.

There is a problem with this process though. It can put a star in the orbit where the Main world is supposed to go. There are two solutions to this. Solution one is to simply move the star to the nearest available orbit so the main world can be where it should be. This is done for planets that end up randomly in the same orbit, so it should work with stars too. Solution two is to have the Mainworld orbit the secondary star that is displacing it from its orbit around the Primary star.

All that being said... In My Traveller Universe I change Page 436 Table 1 to get a C result only on +5 and an N result only on +4 or +5. I don't see how you would realistically have stable planetary orbits around a secondary star when that star is in orbit 0 around a primary.... The primary would HAVE to be screwing with the secondaries satellites pretty badly if they are that close together. So I prefer that the odds of secondary stars be lower in general, and that the odds also heavily favor secondary stars being much further out from the primary. But that is just me, do what you like IYTU.

 

[Drakon]

Cite Sources

This is what I got from Travellermap.com and Traveller wiki

Hex Name UWP Remarks {Ix} (Ex) [Cx] N B Z PBG W A Stellar
1808 Lemish A79568C-C Ag Ni Cp { 2 } (956+2) [988F] BCF N 101 8 Im M1 V M2 V
http://travellermap.com/api/sec?sector=Corridor&type=SecondSurvey

The Lemish Subsector subsector contains 32 worlds with a population of 2.4 billion. The highest population is 900 million, at Alfive. The highest tech level is D at Dzaedenforr and Aurolee. The subsector capital is at Lemish.
http://travellermap.com/sector.htm?sector=Corridor#

Lemish's starport and industrial capacity were severely damaged by recent Vargr raids. The planetary governor fervently declared his unwillingness to pay protection money to Vargr corsairs. In retaliation, the Vargr mustered a fleet and sacked the planet, specifically concentrating their attacks on the port and manufacturing complexes. The planet's technology dropped three levels. The shipyards were totally destroyed, and the other port facilities were barely functional after the attack.
At present, rebuilding efforts are in progress, but the disruption of interstellar trade in the sector has prevented the inhabitants from getting crucial supplies. Remnants of the Vargr fleet continue to patrol the system, and travellers are advised to avoid Lemish if possible. http://wiki.travellerrpg.com/Lemish_(world)

Lemish Subsector is defended by the 60th and 105th fleets.
http://wiki.travellerrpg.com/Lemish_Subsector

So as far as I know this is all the canonical information available. If there is any more, please tell me as I want to make this as canony as possible. The Second Survey data indicates a second star already. But does not indicate if they are companion stars, close orbit, or what ever.

I agree with you about companion stars with orbiting planets. If the two stars are tight binaries, and small enough, then it seems to me that orbit 0 would be in the HZ zone, but only that orbit, even with a second M class star.

I've never dealt with the world building before, been more concentrated on the shipbuilding side of things.

 

[rancke]

So as far as I know this is all the canonical information available. If there is any more, please tell me as I want to make this as canony as possible. The Second Survey data indicates a second star already. But does not indicate if they are companion stars, close orbit, or what ever.

Did you notice that the wiki reference makes the two stars an M5 V and an M2 V?


Hans

 

[Drakon]

Did you notice that the wiki reference makes the two stars an M5 V and an M2 V?


Hans

I did not. I would assume Travellermap trumps Wiki, but is that a good assumption?

 

[rancke]

I did not. I would assume Travellermap trumps Wiki, but is that a good assumption?

I know very little about Travellermap, but I shouldn't think so. If Travellermap provides references, you could compare the two canon sources and see which one is the best. For whatever definition of 'best' you prefer.

Canon isn't holy writ. It's a way to make sure (or at least improve the odds) that someone else doesn't create information about (in casu) Lemish that is incompatible with the stuff you make up about Lemish. And when two different bits of canon says two different things, there's always the chance that someone else will use the bit you didn't.

I believe there's a complete list of UWPs for the Imperium created for T5. The best you can do, I think, is to track down the T5 listing for Lemish and go with that.


Hans

 

[fridge]

Travellermap has the T5 Second Survey UWPs. If it included the T5 extensions, which it looks to have, you have the latest version. The wiki is catching up.

 

[Drakon]

Stellar Cartography

Travellermap has the T5 Second Survey UWPs. If it included the T5 extensions, which it looks to have, you have the latest version. The wiki is catching up.

That was my guess as well. There is also a site called Traveller Atlas, which does not have the T5 extension.

And I would rather use the Travellermap.com T5 extensions since I really blew the [Cx] rolls.

The original "first survey" appears to have been published by DGP, and I do not have access to that material. From a game standpoint, it does not matter if it is M5V or M1V. The only HZ orbit is orbit 0.

From a astrographics point, an M1V is hotter than an M2V which is hotter than an M5V. Shouldn't the hotter star be the primary?

 

[Drakon]

Raw map

In the art gallery, I posted my first attempt at a map for the planet Lemish.

 

[Fovean]

From a astrographics point, an M1V is hotter than an M2V which is hotter than an M5V. Shouldn't the hotter star be the primary?

Yes. Conventionally, the hottest star (ie, the brightest) is considered the primary of a multi-star system.

 

[Drakon]

Roll, roll, roll your dice

Regardless, I can tell you how to use Pg. 436, Table 1.

Roll Flux Three times, once on column C, once on Column N, and once on column F. If any result is +3, +4, or +5 then there is a second star in that orbit zone. For each star that is present (Prime a/o C, N, F) roll Flux on the Companion column to determine if there is a companion to that star (another star inside orbit 0 of that given star). Once you determine the stars and companions present go to Table 3 to determine the C, N, and F orbit relative to the primary for each star.

Roll 3 times, once each for C, N and F. Roll for each Primary to see if they have a companion. What if you blow all 4 rolls? (I did) The data says the stars are there, just not where there they are.

How bout, if you blow the rolls for each of the three orbit zones, then the second star is companion inside orbit zero?

I did roll for Worlds and Orbits (p432) and got +2=Planet, 0HZ variance. So Lemish is in Orbit zero, of a tight binary pair.

 

[arentol]

Roll 3 times, once each for C, N and F. Roll for each Primary to see if they have a companion. What if you blow all 4 rolls? (I did) The data says the stars are there, just not where there they are.

How bout, if you blow the rolls for each of the three orbit zones, then the second star is companion inside orbit zero?

I did roll for Worlds and Orbits (p432) and got +2=Planet, 0HZ variance. So Lemish is in Orbit zero, of a tight binary pair.

You asked how to use the table. I explained how to use the table. My answer was independent of your question about Lemish.

The table is not designed to be used to create a star system about which you already have secondary survey data. I don't know how to handle that kind of situation officially. Unofficially I would just roll a D6, 1 it is companion, 2 it is close, 3-4 it is near, 5-6 it is far. Then I would follow the normal process for placing it in its exact orbit, and finish out the rest of the system as normal.

 

[Drakon]

The table is not designed to be used to create a star system about which you already have secondary survey data. I don't know how to handle that kind of situation officially. Unofficially I would just roll a D6, 1 it is companion, 2 it is close, 3-4 it is near, 5-6 it is far. Then I would follow the normal process for placing it in its exact orbit, and finish out the rest of the system as normal.

I am looking for the official way to handle this, but I like your idea better. Especially after blowing 7 Flux rolls in a row.

Or you could treat it as a very big LGG?