Esil (world)

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This is a world-system under construction and is currently being input-programmed into the Traveller RPG Wiki.

Esil/Jerik (Halcyon 0429)
Classic Era (1115)
C342533-5
StarportC Routine: No Construction, Major Repair, Unrefined fuel
Size3 Small (4,800 km, 0.24g - 0.34g)
Atmosphere4 Thin (tainted)
Hydrographics2 Dry World 20%
Population5 Moderate (400 thousand)
Government3 Self-Perpetuating Oligarchy
Law3 Low Law (no automatic weapons)
Tech Level5 Industrial (mass production)
See also UWP
System Details
Primary M0 V M1 V
Planetoid Belts 1
Gas Giants 2
jumpmap?sector=Halcyon&hex=0429&options=8451&jump=3&scale=32&junk=junk.png
Jump map from Travellermap.com [1]

Esil is a poor, nonindustrial hellworld with a population struggling to survive in an inhospitable environment.

  • Hellworlds often offer daily, and sometimes even hourly, life-threatening situations to their inhabitants. Survivors often form intense survival skills and tend to be grim realists.
  • It requires extensive imports of outside technology to maintain a modern, star-faring society.
  • This a "low technology" world with technology competency well below technology standards for Charted Space.
  • It is a Non-Aligned world dominated by human sophonts located in the Jerik Subsector of Halcyon Sector.


Astrography and Planetology[edit]

This star system is detailed using the Fringian Variant System Description.

Binary Solar System[edit]

Esil Binary Star System
Star Name Hierarchy Color Classification Remarks
Esil Primary Primary Red M0 V
Esil Companion Secondary Red M1 V 1.73 AU from primary


System Data[edit]

Marabar-Esil System[edit]

The primary is Marabar, an ordinary red main sequence star. It has a luminosity of 0.04 Sols, a mass of 0.489 Sols, and a diameter of 764,000 km. (I-I) Esil, designated the mainworld, and (I-II) a very thin atmosphere radworld, have a shared orbit within the habitable zone. (II) an exotic atmosphere radworld forms the inner part of the outer system. Orbital positions (III) through (VII) are unavailable due to the presence of the companion star. (VIII-I) a dense icy planetoid belt, (VIII-II) a small gas giant, and (IX) a ringed large gas giant orbit the system's barycenter and form the outer part of the outer system. Many of the worlds retain satellites.

  • The star experiences periodic flare activity.

Onguth Subsystem[edit]

The companion is Onguth, an ordinary red main sequence star lying approximately 1.73 AU (orbital position (V), 258.8 million km) from Marabar. It has a luminosity of 0.0334 Sols, a mass of 0.4574 Sols, and a diameter of 711,000 km. (I-I) a very thin atmosphere radworld, and (I-II) a trace atmosphere radworld, have a shared orbit within the habitable zone. (II) a corrosive atmosphere bigworld forms the outer system. Many of the worlds retain satellites.

  • The star experiences periodic flare activity.
  • The two stars have similar masses and orbit a barycenter located at around 0.84 AU (orbital position (III), 125.7 million km). They have an orbital period around one another of 289 days 1 hour.

Mainworld Data[edit]

(I-I) Esil[edit]

(I-I) Esil is designated the mainworld. It orbits Marabar at a mean distance of 0.12 AU (17.9 million km), within the habitable zone. It has an orbital period of 21 days 17 hours: it is tidally locked to [primary]. The axial tilt is 2 degrees relative to Marabar. Esil has a diameter of 5,194 km, a density of 2.83 g/cm³, and a surface gravity of 0.21 G. Tidal stresses generated by the gravitational pull of Marabar cause frequent geological activity. Its atmosphere is rated as Thin, Tainted, with a mean surface pressure of 0.55 bar and a composition of 80% nitrogen (N2), 18% oxygen (O2), 1% argon (Ar), and 1% water vapor (H2O), carbon dioxide (CO2), ozone (O3), radon (Rn), neon (Ne) and other trace gases. The taint is caused by the high levels of background radiation: emission rates exceed 45 rads per hour. Approximately 22% of the surface is covered in seas of liquid water: average tidal ranges exceed 0.3m. Mean surface temperature: 32°C. The climate is rated as Hot and is static, with no seasonal changes during the local year. The atmosphere is dynamic and strong weather systems driven by the star and the seas sweep across the globe.

Mainworld Geography and Topography[edit]

Total surface area: 85 million km², Land surface area: 66 million km², Water surface area: 19 million km².

  • Esil is a Twilight Zone World.
  • The world experiences libration, which causes the star to move in the sky and periodically rise and fall above the horizon in the twilight region.

Native Lifeforms[edit]

Marabar-Esil System[edit]

Esil, the mainworld, has extensive radiation-tolerant native life, consisting of microscopic organisms, stromatolite-parallels and primitive flora that can be found in almost every ecological niche. Their metabolic functions drive the process of atmospheric renewal.

The temperate radworld lying in orbital position (I-II) (within the habitable zone) has primitive radiation-tolerant native life, consisting entirely of microscopic cyanobacteria-parallels that thrive in the harsh conditions. Their metabolic functions drive the process of atmospheric renewal.

No other world in the system is known to have native life.

Onguth Subsystem[edit]

The temperate radworld lying in orbital position (I-I) (within the habitable zone) has extensive radiation-tolerant native life, consisting of minute multicellular organisms that can be found in most ecological niches. Their metabolic functions drive the process of atmospheric renewal.

The temperate radworld lying in orbital position (I-II) (within the habitable zone) has primitive radiation-tolerant native life, consisting entirely of microscopic cyanobacteria-parallels that thrive in the harsh conditions. Their metabolic functions drive the process of atmospheric renewal.

No other world in the subsystem is known to have native life.

History & Background (Dossier)[edit]

No information yet available.

World starport[edit]

Esil has a routine quality starport.

  • A Class C Starport Facility has minimal if any shipyards and can only perform extremely limited repair work.
  • This facility has many very skilled personnel who can perform surprisingly sophisticated repair work despite the limited facilities.
  • This facility has refueling infrastructure and limited refining capabilities. One may purchase unrefined fuel here.
  • Starports of this class rarely have both a Lowport and a Highport.

World technology level[edit]

Esil possesses a Technology Level of TL–5.

World government[edit]

Esil has a Self-Perpetuating Oligarchy government.

  • It is a government by a restricted minority, with little or no input from the masses.
  • The typical power source of this government is an Oligarchy.
  • The typical power structure of this government is a Hegemony.

World military[edit]

No information yet available.

World economy[edit]

No information yet available.

Trade data[edit]

No information yet available.

World demographics[edit]

No information yet available.

World culture[edit]

No information yet available.

Historical data[edit]

No information yet available.

World timeline[edit]

No information yet available.

UWP listing[edit]

No information yet available.

References & Contributors / Sources[edit]

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  1. "Jump Map API" and map location from Travellermap.com