Revised Dark Nebula Planetary Data

An artist’s rendition of the garden world of Satwor (DARK 2610 A867632-A) in the Akuusir Cluster. Source: Solomani Ministry of Information holopamphlet, “The Border Worlds of the Confederation” (5661).

In addition to tweaking stellar data, I also wanted to add Traveller⁵ trade classifications for climate and satellites, and potentially seed a few larger world sizes into my house sector data for Dark Nebula. I also found a few irregularities in the data currently available on Traveller Map, most likely the result of earlier passes from the T5 Second Survey (T5SS). Finally, I had a couple of random changes I wanted to add.

Mainworld Placement

By determining the mainworld’s orbit, we also establish the mainworld’s climate and whether the mainworld is tide-locked to the primary or not. Traveller⁵ assumes that mainworlds are generally found in or around the habitable zone orbit (HZ) of their primary. The specific orbit is determined randomly with a Flux roll. Accordingly, most worlds will orbit in the HZ and have a moderate climate range. A low Flux puts a mainworld in orbit HZ-1, with a Hot (Ho) or Tropic (Tr) trade classification; a high Flux puts a mainworld in orbit HZ+1, with a Cold (Co) or Tundra (Tu) classification.

The most common modifier is for class M main sequence stars: M0 V, M1 V, M2 V, or M3 V. The HZ for such stars is orbit 0 (about 0.2 AU), so worlds orbiting these stars cannot occupy one orbit in: the modifier pushes their orbits to the HZ (orbit 0), HZ+1 (orbit 1), or HZ+2 (orbit 2). A world orbiting in HZ+2 might qualify for the Frozen (Fr) code, often associated with worlds in the outer system.

After generating orbital placements for Dark Nebula, I then made a series of passes to massage the resulting data. I swapped the climate codes of several worlds with breathable atmospheres (4–9, E) with worlds with unbreathable atmospheres (0–3, A–C) to move more of the former into an HZ orbit and more of the latter out of an HZ orbit.

Planet or Satellite

Traveller⁵ determines whether a mainworld is a planet or the satellite of a gas giant or large terrestrial planet with another Flux roll. An important rule of thumb that I followed was to prevent worlds that orbit too close to the primary (orbits 0 or 1) from being satellites: this removed several satellites from the dataset, since M and K class main sequence stars are so common. I also moved several satellite codes from larger worlds (7+) to smaller worlds (4-).

Tide-Locking and Resonant Orbits

One inevitable consequence of applying Traveller⁵ world generation rules to sector data is that, because class K and M main sequence stars are so common, you end up with a LOT of mainworlds in orbits 0 or 1. By default, worlds in these orbits are considered tide-locked with the trade classification Twilight Zone (Tz).

As I noted in my post on Dark Nebula stellar data, there is an interesting debate going on right now about the habitability of such worlds, with strong arguments being made for and against. Worlds with either no, trace, or exotic atmospheres make sense as tide-locked worlds. Similarly, worlds with either a great deal of water (8+) or very little water (3-) also made sense as tide-locked.

Although Traveller⁵ does not provide for this possibility, worlds in close orbit to the primary may fall into a resonant orbit with the primary, like Mercury in the Sol system. I took a hard look at Twilight Zone worlds with breathable atmospheres and moderate hydrographic percentages. And for a select number of these worlds, I overrode the Twilight Zone code and assumed they have resonant orbits:

• Aleikhes (DARK 0710 A755657-D)
• Arahao (DARK 1008 C544733-5)
• Meskok (DARK 2308 C654768-5)
• Niysk (DARK 2405 E867424-2)
• Springflow (DARK 2510 B777465-8)
• Satwor (DARK 2610 A867632-A)
• Temgassung (DARK 3205 C777422-5)
• Eweuas (DARK 0112 A585745-C)
• Merpikhnomi (DARK 1116 E544653-5)
• Turnovo (DARK 3020 D766762-4)
• Aiaiso (DARK 0727 C678747-8)
• Eohe (DARK 0536 B776686-A)
• Hroilr (DARK 1536 A556788-C)
• Eiar (DARK 2539 C884788-8)
• Miken (DARK 3033 B678564-9)

Large Terrestrial Planets

Traveller⁵ allows for mainworlds of larger than size A, though these are fairly rare. Recent discoveries in exoplanetology seem to support this idea, so I increased the size of the following size A Dark Nebula mainworlds accordingly:

World Size Changes

Hex	Name	UWP	Remarks
0909	Syasaral	DCA5499-8	Fl Ni Px
2605	Dengmi	CB88486-4	Ni Pa
0315	Etlaorla	CDC5166-A	Fl Lo Sa
2838	Olruiwos	BBA5786-A	Fl Tz

Forbidden Worlds

As discussed previously, many Dark Nebula worlds with starport X in Atlas of the Imperium had their starport codes changed to E or higher with Red travel zones during one round of T5SS review. For many of these worlds, the starport codes were reverted back to X during a subsequent round of review. But several starports lost both the X designation and the Red Zone, and I believe this was an error.

Simply adding back class X starports to these worlds presents a challenge. A class X starport imposes a hefty (-4) penalty on Tech Level. This can result in a maximum TL that is below the minimum necessary, which is determined by Atmosphere. Take, for example, Rormepeni (DARK 0915 E8B4443-8). An Atmo code of B indicates corrosive: “A concentrated gas mix or unusual temperature creates a corrosive environment, which requires the use of a protective suit or vacc suit” (MT Referee’s Manual 20–21). Such a hostile environment requires a minimum TL of 8. But if we gave Rormepeni a class X starport, the maximum TL we could generate would be 6 (1D) -4 (starport) +1 (Atmo) +1 (Pop) = 4, not enough to make it with a corrosive atmosphere.

For such worlds, we can leave the Class E starport but add a Red Zone travel code and the Forbidden (Fo) trade classification: Eahaeah (DARK 0206 E523498-7), Ahuawiyoi (DARK 0607 E8C4544-9), Ealyurei (DARK 0120 E100266-7), Rormepeni (DARK 0915 E8B4443-8), Ktealau (DARK 0130 E998123-7), Hlehekah (DARK 1127 E100545-A), Eakhyehiyye (DARK 0740 E544643-6), and Aiheisaus (DARK 1637 E100443-7). Only the world of Yetiuaya (DARK 2340 E768448-7) can also have its starport X reinstated.

Most of these red-zoned worlds are likely self-interdicted.

Hydro Codes

Several worlds in Dark Nebula have Hydrographics codes out of range from the Atmosphere codes: Ul (DARK 0603 A682698-A), Pannusgario (DARK 1003 A5829DB-A), Eariure (DARK 1901 C73A332-A), Lachbes (DARK 2501 D73A146-6), Asati (DARK 1912 D729400-9), Nabokov (DARK 3118 DAF5532-3), Shrlmia (DARK 3119 B7C2644-9), Ftihahe' (DARK 1023 D5A0798-8), Ekhiy (DARK 2023 B629386-B), O'awiy (DARK 2525 E84A897-8), Hkitei (DARK 0634 B73A367-E), Ahiyh (DARK 0838 E62A7A9-9), Hiwoieikh (DARK 1832 D893435-6), and Hynrl-Lavo (DARK 3036 A539543-E).

The T5SS was generally pretty rigorous in enforcing these limits and it looks like most of these are simple omissions. Most can be fixed by adjusting the Hydro code and occassionaly adding or removing a trade classification. Hkitei and Ahiyh, however, could not be adjusted without also changing the TL, which then cascades through the Importance, Economic, and Cultural extensions. For both worlds we can adjust the Atmo to 5.

Other Changes

The world 541-668 (DARK 2601 X541668-5) was explicitly described in Solomani and Aslan as being known only by its hex location (“2601”) but was issued a Scout Service type name. I had brought this up to Don McKinney during one pass of the T5SS but was overruled. Given that the original “name” has canonical backing I reverted the name for my own take.

Finally, Earle (Dark Nebula 0307) is described in Solomani and Aslan as an “Aslan world with high percentage of human population” (p 69). This would also correspond with the history of the world as noted on page 99. Based on this, I would recommend adding the remark “Huma4,” which would represent some 12 billion humans.

Change Log

Here are the resulting changes from adding Traveller⁵ classifications to the legacy Dark Nebula data:

• Uiwe (0106) - add remark Tz.
• Oukheayekh (0107) - add remark Co.
• Oifairouw (0109) - add remark Tu.
• Yeasea (0201) - add remark Tz.
• Eahaeah (0206) - add remarks Tz Fo; Add R code to Travel Zone field to reflect Atlas of the Imperium.
• Aohoikiy (0207) - add remark Lk.
• Earle (0307) - add remarks Ho, Huma4 to reflect Solomani & Aslan.
• Eakhtya'i (0402) - add remarks Sa Fr.
• Sowhkeiy (0407) - add remarks Tz Ho.
• Haiaokoa (0408) - add remark Tz.
• Ularin (0501) - add remark Co.
• Limenas (0502) - add remark Fr.
• Usun (0503) - add remarks Sa Co.
• Oekhaihikh (0507) - add remark Tz.
• Amar (0601) - add remark Tz.
• Ul (0603) - change UWP to A683698-A to put Hydro code within range.
• Ahuawiyoi (0607) - add remarks Tz Fo; add R code to Travel Zone field to reflect Atlas of the Imperium.
• Tahetlo (0609) - add remark Ho.
• Oiwohas (0707) - add remarks Lk Co.
• Nalale (0801) - add remark Tz.
• Elulor (0805) - add remark Tz.
• Fteite (0807) - add remark Sa.
• Hye (0809) - add remark Tz.
• Chesall (0903) - add remark Sa.
• Aoaki (0907) - add remark Lk.
• Syasaral (0909) - change UWP to DCA5499-8; add remarks Tz Ho.
• Pannusgario (1003) - change UWP to A5839DB-A to place Hydro code within range.
• Walryaei (1004) - add remarks Tz Co.
• Yoaieal (1104) - add remark Tz.
• Hrowele (1107) - add remarks Tz Tr.
• Osuilyuh (1110) - add remark Tz.
• Trienamm (1203) - add remark Tz.
• Uaweisa (1205) - add remark Co.
• Hfieao (1207) - add remark Co.
• Ftahalr (1208) - add remark Tz.
• Canshar (1304) - add remark Tz.
• Teioyukh (1310) - add remarks Tz Ho.
• Reawaiy (1402) - add remarks Tz Co.
• Oheou (1501) - add remark Tz.
• Nihoipo (1504) - add remark Tz.
• Hyeirih (1506) - add remark Sa.
• Irekhal (1508) - add remark Ho.
• Iweheh (1603) - add remarks Sa Co.
• Jardeng (1604) - add remarks Tz Ho.
• Eiyriou (1608) - add remark Tz.
• Brensat (1609) - add remark Tz.
• Aowoiktes (1705) - add remark Tz.
• Yeyofui' (1708) - add remark Tz.
• Doning (1804) - add remark Tz.
• Bathanfel (1805) - add remark Ho.
• Earlure (1901) - change UWP to C738332-A to put Hydro code within range; remove Wa remark; add remarks Tz Ho.
• Murphy (1902) - add remarks Sa Co.
• Aeia (1907) - add remark Lk.
• Bontennes (2001) - add remark Tz.
• Rodsban (2002) - add remark Tz.
• Sordno (2010) - add remark Tz.
• Febung (2108) - add remark Tz.
• Tauoilais (2109) - add remarks Tz Co.
• Kemsung (2202) - add remark Tz.
• Dloh (2208) - add remarks Sa Ho.
• Datja (2302) - add remark Tu.
• Wisu (2402) - add remark Tz.
• Wanlir (2403) - add remark Tz.
• Mamalt (2404) - add remark Tz Co.
• Mosarelel (2407) - add remark Tz Co.
• Carn Gafall (2408) - add remark Tz.
• Lachbes (2501) - change UWP to D738146-6 to put Hydro code within range; remove Wa remark; add remark Tz.
• Karziv (2603) - add remarks Tz Ho.
• Dengmi (2605) - change UWP to CB88486-4.
• Fonfado (2606) - add remark Fr.
• Morlisbon (2609) - add remark Tz.
• Rana (2710) - add remark Ho.
• Romart (2810) - add remark Tz.
• Mosgat (2901) - add remark Tz.
• Renfrew (2904) - add remark Tz.
• Angle (3005) - add remark Tz.
• Patawidmam (3009) - add remark Ho.
• Wormen (3106) - add remark Lk.
• Linate (3204) - add remarks Lk Ho.
• Ouleawos (0114) - add remarks Tz Co.
• Tyakhyo (0115) - add remark Tz.
• Ealyurei (0120) - add remarks Lk Fo; add R code to Travel Zone field to reflect Atlas of the Imperium.
• Aulyetyu (0214) - add remark Tz.
• Au'aiyyee (0220) - add remarks Sa Co.
• Ayeiyfua (0311) - add remarks Lk Ho.
• Kikeasa (0314) - add remark Tz.
• Etlaorla (0315) - change UWP to CDC5166-A.
• Oyuyes (0316) - add remark Tz.
• Ealalrye (0317) - add remark Tz.
• Htaheatelr (0411) - add remarks Tz Co.
• Ftyuealoi (0416) - add remark Co.
• Hkyewao (0519) - add remark Lk.
• Htiyhoai (0612) - add remark Tz.
• Hirliyse (0613) - add remark Lk.
• Ktarua (0614) - add remarks Tz Co.
• Leftearl (0615) - add remark Sa.
• Uioirli (0811) - add remarks Tz Co.
• Nishror (0812) - add remarks Tz Tu.
• Chorikhnare (0815) - add remark Tz.
• Htaweal (0817) - add remarks Tz Ho.
• Siniob (0819) - add remark Tz.
• Kipelaresh (0914) - add remark Tz.
• Rormepeni (0915) - add remarks Tz Fo; add R code to Travel Zone field to reflect Atlas of the Imperium.
• I'etle (0916) - add remarks Sa Co.
• Ewuia (0918) - add remark Ho.
• Hopeshre (1014) - add remark Tz.
• Ihkasya (1020) - add remark Fr.
• Alaooh (1111) - add remark Tz.
• Osa (1112) - add remark Tz.
• Eaisakh (1120) - add remark Ho.
• Thometha (1213) - add remarks Sa Co.
• Meshmo (1215) - add remarks Tz Ho.
• Iopfen (1217) - add remark Tz.
• Oyarn (1420) - add remark Ho.
• Ekhtekih (1518) - add remark Tz.
• Eauie (1519) - add remark Tz.
• Aseahya (1611) - add remarks Tz Co.
• Sherarehi (1615) - add remarks Sa Ho.
• Hlao (1719) - add remark Tz.
• Ye (1813) - add remark Tz.
• Asati (1912) - change UWP to D727400-9 to put Hydro code within range; add remarks Tz Ho.
• Kakhisil (1915) - add remark Fr.
• Horrace (1916) - add remark Tz.
• Khoakta (1918) - add remarks Lk Co.
• Taeahehe (2011) - add remark Tz.
• Morain (2012) - add remark Fr.
• Hleahao (2018) - add remarks Lk Co.
• Oiaous (2020) - add remark Tz.
• Ikhaeal (2111) - add remark Tz.
• Sharp (2117) - add remark Tz.
• Pritchard (2214) - add remark Tz.
• Yakolev (2215) - add remark Co.
• Crain (2216) - add remark Tz.
• Ehoioi (2218) - add remark Tz.
• Strin (2316) - add remark Lk.
• Nigdye (2413) - add remark Tz.
• Ilriyhya (2415) - add remark Ho.
• Stop Gap (2416) - add remark Sa.
• Lima (2511) - add remarks Fr Sa.
• Tortsad (2516) - add remarks Sa Co.
• Wolsone (2613) - add remark Tz.
• Hichape (2713) - add remark Tz.
• Ninnihrang (2812) - add remark Tz.
• Merejace (2815) - add remark Tz.
• Waq (2819) - add remark Co.
• Shobind (2911) - add remark Tz.
• Yakoru (3114) - add remark Tz.
• Morsang (3116) - add remark Tz.
• Nabokov (3118) - change UWP to DAF6532-3 to put Hydro code within range.
• Shrimia (3119) - change UWP to B7C3644-9 to put Hydro code within range; remove He remark; add remark Tz.
• Pangringgan (3120) - add remarks Co Tz.
• Aiolio (3214) - add remark Tz.
• Wangmetjem (3217) - add remarks Tz Ho.
• Iruma (3219) - add remark Tz.
• Kteatau (0130) - add remark Fo; add R code to Travel Zone field to reflect Atlas of the Imperium.
• Yehta (0226) - add remark Lk.
• Seilrye (0227) - add remark Tz.
• Iyyoiy (0321) - add remark Fr.
• Ktaol (0327) - add remark Tz.
• Ruiloih (0328) - add remark Sa Co.
• Wuhtiaweh (0329) - add remarks Tz Co.
• Ye'aeaoafokh (0330) - add remark Lk.
• Atayekhe (0421) - add remark Tz.
• Yokiyheir (0423) - add remark Tz.
• Teaiyre (0427) - add remark Tz.
• Eftaeikui (0428) - add remark Lk.
• Hoireh (0523) - add remark Sa.
• Heiaieai' (0524) - add remarks Sa Ho.
• Ao'iyaulra (0627) - add remark Tz.
• Khteau (0628) - add remark Co.
• Ihkeh (0629) - add remarks Tz Co.
• Stofakhail (0630) - add remark Lk.
• Stui (0721) - add remark Tz.
• Yasai (0722) - add remark Tz.
• Erloufteaw (0725) - add remark Ho.
• Ziha (0824) - add remark Tz
• Auyal (0825) - add remark Tz.
• Khtyu (0827) - add remarks Lk Co.
• Foiheliy (0922) - add remark Tz.
• Ftihahe' (1023) - change UWP to D5A1798-8 to put Hydro code within range; add remarks Fl Lk Co.
• Leihkyeau (1025) - add remarks Lk Co.
• Ilkhah (1027) - add remark Tz.
• Oarua (1121) - add remark Tz.
• Ahehuikh (1124) - add remark Tz.
• Htehekah (1127) - add remarks Sa Co Fo; add R code to Travel Zone field to reflect Atlas of the Imperium.
• Hlitilar (1224) - add remark Lk.
• Naco (1321) - add remark Tz.
• Iyokh (1430) - add remarks Tz Co.
• Foiseihyaluh (1522) - add remark Tz.
• Mihraga (1621) - add remark Ho.
• Hyesiyr (1622) - add remark Lk.
• Heahelie (1629) - add remark Tz.
• Easouyao (1721) - add remarks Sa Co.
• Syailei (1724) - add remark Tz.
• Tenarna (1825) - add remarks Tz Ho.
• Yelrailr (1829) - add remarks Tz Co.
• Iyaiah (1925) - add remark Lk.
• Tiylewoiw (1930) - add remark Tz.
• Ewirarl (2021) - add remark Sa.
• Ekhiy (2023) - achange UWP to B627386-B to put Hydro code within range; add remark Tz.
• Fyawahri (2026) - add remarks Lk Co.
• Kihahouwu (2028) - add remarks Tz Ho.
• Sewalair (2121) - add remark Lk.
• Iyhahorl (2125) - add remark Tz.
• Aohitao (2126) - add remark Tz.
• Khtyasitrao (2322) - add remark Tz.
• Styaroir (2325) - add remarks Tz Co.
• Oskvo (2422) - add remarks Tz Ho.
• Iweakhte (2426) - add remark Tz.
• Eiouktoh (2427) - add remark Tz.
• Oiirl (2430) - add remarks Tz Co.
• Besmam (2523) - add remark Tz.
• Sovkhersk (2524) - add remark Ho.
• O'awiy (2525) - change UWP to E849857-8 to put Hydro code within range and maintain TL; remove Wa remark.
• Earltras (2527) - add remark Fr.
• Dranweis (2624) - add remark Sa.
• Gallbre (2629) - add remarks Tz Co.
• Aokhtiyfti (2728) - add remarks Sa Co.
• Kanna (2824) - add remark Ho.
• Petal (3024) - add remark Tz.
• Bridgehead (3121) - add remark Tz.
• Shin (3123) - add remark Tz.
• Terenn (3128) - add remark Tz.
• Garnenshold (3129) - add remark Tz.
• Abmi (3223) - add remark Tz.
• Cupuepue (3226) - add remarks Tz Co.
• Iykye (0136) - add remark Co.
• Hkiho (0140) - add remark Lk.
• Khiyu (0239) - add remark Lk.
• Aotui'asiyr (0334) - add remarks Tz Co.
• Wiykhearl (0335) - add remarks Sa Ho.
• Eaoer (0336) - add remark Tz.
• Iytaow (0432) - add remark Tz.
• Eoyaea (0435) - add remarks Sa Co.
• Traihoa (0437) - add remark Tz.
• Ihkealresiy (0440) - add remarks Sa Ho.
• Hkitei (0634) - change atmo to 5; add remark Tz.
• Waohar (0738) - add remark Tz.
• Eakhyehiyye (0740) - add remark Fo; add R code to Travel Zone field to reflect Atlas of the Imperium.
• Feakh (0835) - add remarks Tz Co.
• Ahiyh (0838) - change atmo to 5; remove remark Pi; add remarks Wa Ho.
• Ewei (0839) - add remarks Tz Co.
• Soukhi' (0934) - add remark Sa.
• Uryarlil (0937) - add remarks Lk Ho.
• Seiyasar (0939) - add remark Tz.
• Kheiei (1034) - add remark Sa.
• Taleiw (1037) - add remarks Tz Co.
• Isikhas (1232) - add remark Sa.
• Eiefei'os (1235) - add remarks Sa Co.
• Eikhilua (1236) - add remark Tz.
• Teayokhtae (1238) - add remark Tz.
• Htakaoea (1331) - add remark Tz.
• Heaeakh (1335) - add remark Tz.
• Suikhiyeisela (1337) - add remark Sa.
• Yoreah (1431) - add remark Sa.
• Oihaiyo (1434) - add remark Tz.
• Ikhoalreih (1439) - add remark Lk.
• Aiheisaus (1637) - add remarks Co Fo; add R code to Travel Zone field to reflect Atlas of the Imperium.
• Eihkeha (1638) - add remark Tz.
• Tlaea'yeryel (1640) - add remark Tz.
• Ihtye (1731) - add remark Fr.
• Asefihea (1740) - add remark Tz.
• Hiwoieikh (1832) - change UWP to D894435-6 to put Hydro code within range; add remarks Pa Tz.
• Atoiloilol (1939) - add remark Tz.
• Oakheiye (2031) - add remarks Tz Co.
• Eahkihkao (2033) - add remarks Tz Ho.
• Htao'ewyalr (2038) - add remark Tz.
• Eiaohe (2039) - add remark Sa.
• Ehairiwa (2131) - add remark Tz.
• Hkyosali (2132) - add remark Ho.
• Ewausiaktiy (2136) - add remarks Tz Co.
• Hkayuea (2140) - add remark Tz.
• Erelefo (2335) - add remark Tr.
• Yetiuaya (2340) - Change UWP to X768448-3 to match Atlas of the Imperium; add remarks Fo Tz; change Cultural Extension to [4153]; add R code to Travel Zone field.
• Uiwealirlao (2435) - add remarks Tz Ho.
• Oeafowyahlulr (2537) - add remark Tz.
• Khaolao (2635) - add remark Tz.
• Hyefteite (2639) - add remark Tz.
• Jingleswelt (2732) - add remark Tz.
• Ohkiylyo (2734) - add remarks Tz Co.
• Theleme (2836) - add remarks Lk Ho.
• Brimate (2837) - add remark Lk.
• Olruiwos (2838) - change UWP to BBA5786-A; add remark Tz.
• Teaoiyekh (2839) - add remark Tz.
• Ilalt (2937) - add remark Tz.
• Gimemuh (2938) - add remarks Tz Co.
• Caparro (3032) - add remarks Tz Co.
• Hynri-lavo (3036) - change UWP to A538543-E to put Hydro code within range; add remark Tz.
• Treege (3132) - add remark Tz.
• Junganyika (3236) - add remark Lk.
• Newquay (3240) - add remark Tz.

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