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In My Traveller Universe Detail what parts of Traveller you do (or don't) use in your campaign.

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  #1  
Old April 3rd, 2018, 12:54 PM
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Default Real-universe jump distances

I built a spreadsheet of the 54 closest stars (including known brown dwarves) off Wikipedia's page and then added 14 additional near systems with known exoplanets within 31 LY.

I did some Excel magic to convert the right ascension, declination, and distance to X, Y, Z coordinates with Sol at 0,0,0.

I turned that into a matrix that shows the distance from each of those stars to each other, in parsecs.

I applied highlighting rules to call out the stars that were within 1 parsec of another star. With some COUNTIF rules, I was able to make a column for each star to show how many stars it could reach within 1.0, 1.5, 1.7, 1.9, 2.0, and 3.0 parsecs.

Of the 66 stars on my chart (including Sol), there are 2145 pairs of stars.

I can calculate how many (what %) of stars have a pair within a given distance. Furthermore, I can count how many stars are entirely unreachable.

12 pairs (0.56%) are within 1 parsec of one another. 55 (83%) are unreachable.

32 (1.5%) are within 1.5 pc. 40 (61%) are unreachable.

46 (2.1%) are within 1.7 pc. 35 (53%) are unreachable.

52 (2.4%) are within 1.8 pc. 33 (50%) are unreachable.

141 (6.6%) are within 2.0 pc. 0 (0%) are unreachable.


It's like our galactic neighborhood was built for jump-2.
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Old April 3rd, 2018, 05:59 PM
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Quote:
Originally Posted by Adam Dray View Post
It's like our galactic neighborhood was built for jump-2.

Or jump-1 with tanks just like GDW wrote way back in 1986 in Classic's Solomani Alien Module.
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Old April 4th, 2018, 02:46 AM
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Also doesn't Near Stars use some sort of hypothetical dim stars or something to allow for Jump-1 usage?
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Old April 4th, 2018, 03:07 AM
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Also doesn't Near Stars use some sort of hypothetical dim stars or something to allow for Jump-1 usage?
No. Not in the original one T:2300 NSL. They used a 7.7 LY limit for the drive. Avoids that.

It's out on the fringes that they added some in a supplement - but it was because they wanted a Kafer arm
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Old April 4th, 2018, 03:07 AM
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Quote:
Originally Posted by Orr View Post
Or jump-1 with tanks just like GDW wrote way back in 1986 in Classic's Solomani Alien Module.
Not tanks, a refueling station in the Oort.
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Archduke of Sylea (CORE 2118)
Duke of the Third Imperium (SPIN 0534)
Count Terra (SOLO 1827)
Count Gorod (REFT 1302)
Count of the Third Imperium (SPIN 2232)
Viscount of Adabicci (SPIN 1824)
Marquis of the Solomani Rim (SOLO 0606)
Marquis of the Third Imperium (SPIN 2410)
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Sir William Hostman (OLDE 0512)
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Knight of Deneb (REFT 2239)
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SEH w/Diamonds for Extreme Heroism - Battle of Boughene
MCG - Battle of Boughene
TAS: William Hostman (CORR 2506)
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IMTU ct+ tm++ tne tg-- tt+ tmo+ t4- t20+ to ru+ ge+ 3i+ c+ jt au ls pi+ ta he+ st+
Wil Hostman 0602 C539857-9 S A724
OTU: 95% 3i an+ au+ br- cpu± dt± f+ fs++ ge± ih- inf± j± jf+ jm+ jt+ ls- n= nc+ pi+ pp-- tp+ tr+ tv- vi-- xb+-
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Old April 4th, 2018, 07:51 AM
Taythorian Taythorian is offline
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Hiya

Would you mind sharing your spreadsheet?

I was thinking of doing something similar but you beat me to it.

Cheers
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Old April 4th, 2018, 11:29 AM
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I posted it in the files section: http://www.travellerrpg.com/CotI/Dis...d.php?p=585007
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Old April 4th, 2018, 04:40 PM
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Quote:
Originally Posted by aramis View Post
Not tanks, a refueling station in the Oort.
No. The Classic Alien Module states: It took several years before a US Space Force team based on Luna tried a mission which, in several trips, established an intermediate stopover and refuelling point about one parsec out.

"About parsec out", not in the Oort.
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Old April 4th, 2018, 05:27 PM
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No. The Classic Alien Module states: It took several years before a US Space Force team based on Luna tried a mission which, in several trips, established an intermediate stopover and refuelling point about one parsec out.

"About parsec out", not in the Oort.
The Oort can stretch out a parsec.

https://en.wikipedia.org/wiki/Oort_cloud
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Old April 4th, 2018, 05:27 PM
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Quote:
Originally Posted by Adam Dray View Post
It's like our galactic neighborhood was built for jump-2.
Evidence of Grandfather's manipulations!
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