Henoz (world)

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Henoz/Rhylanor (Spinward Marches 2912)
Milieu 1116
StarportA Excellent: Starship Construction, Overhaul, Refined fuel
Size5 Medium (8,000 km, 0.40g - 0.57g)
Atmosphere4 Thin (tainted)
Hydrographics5 Wet World 50%
Population5 Moderate (800 thousand)
Government4 Representative Democracy
Law3 Low Law (no automatic weapons)
Tech LevelB Average Stellar (large starships)
See also UWP
System Details
Primary F3 V
Worlds 11
Gas Giants 4
Planetoid Belts 2
Cultural Details
Government Representative democracy
Law Level Low
Cultural Extension 2728
Army Size (BEs) 0
Economic Details
Technology Level 11
Economic Extension
ResourcesDVery abundant
Labor4Moderate (80 thousand)
Infrastructure6 Limited
Importance Extension 2
Resource Units 281
GWP (BCr) 2
World Trade Number 4
Trade Volume (MCr/year) 3,307
Starport Details
Classification Class-A
Port Size 4
Building Capacity (Tons) 0
Port employees 290
Port passengers (annual) 1,500

Henoz is an agricultural world with an ideal environment for producing food from plants, animals, or other forms. The system has a population between 100,000 and 10 million sophonts. It is a member of Third Imperium in the Rhylanor Subsector of Spinward Marches Sector and in the Domain of Deneb. Henoz, as a member world of the Third Imperium, holds the estate of an Imperial knight and the fiefdom of a baron. Both are members of the Imperial Nobility charged with overseeing the world.

Astrography & Planetology[edit]

Henoz is a member of the Spinward Main.

Henoz is a small world with a thin atmosphere. This atmosphere is tainted with heavy metal dust. These conditions require than humans wear protective gear equipped with a respirator when venturing outside. Henoz has a 25-hour local day.

Monostellar System[edit]

Henoz Monostellar System
Star Name Hierarchy Category Mass (Sol) Temp (K) Luminosity (Sol)

F3 V

Primary Main Sequence 1.46 6500 - 7000 5.34
Unit Diameter Min Distance Hab Zone Jump Shadow M-Drive Limit
AU 0.01414 0.19167 1.84 - 2.99 1.414 14.14
Orbit #  * 0 5 4 7


Henoz is a moon, but is subject to the gravity of its giant neighbor. These tidal forces stretch the moon, increase the geologic activity. Impacts by rocks and asteroids are also not uncommon, though large impacts are rarely a danger.

Climate is generally cool at the equator, averaging 28 Celsius. Weather is dynamic and high winds are common. Henoz has permanent polar ice caps.

There are large sections of plains and plateau around the equatorial region. Volcanos have formed along long north-south cracks in the surface caused by tidal forces of the gas giant. The volcanos' activity varies in intensity with the orbit of Henoz, but the pattern of eruption is difficult to predict. More stable mountain ranges form 2 rings at the approximately 40 degrees North and 40 degrees South. The major cities tend to be found in these regions, which are each serviced by dual maglev train systems which follow the mountain rings.

Henoz Startown is set in the center of a large, stable tectonic plate at the equator. Maglev trains run from the startown to connect the ring train systems. The juncture to the North is a Henoz City, the capital. To the South, is the larger Juarez City.

Notable Creatures[edit]

Henoz has a sizable Chirper population located in 3 major habitats in the Southern Ring mountains: Quip, Kite and Jing.

Henoz (Mainworld Data)[edit]

  • Mass : 0.3 earth
  • Apparent day length : 25.0 hours
  • Axial Tilt : 5.5 degrees
  • Atmospheric pressure : 0.3 atm
  • Atmospheric composition : nitrogen 78%, oxygen 20%, others 2%
  • Hydrographics : 40%, no oceans
  • Albedo : 0.32
  • Greenhouse effect : 0.3
  • Average surface temperature (G:Space) : 284 K (Cool)
  • Weather factor : 3 (Earth=10, so dynamic)
  • Life : simple animals, max IQ 2 (no primate/cetacean equivalents);
  • Moons: 0

System Overview[edit]

This system is dominated by the bright central star, a white-yellow star with a radius of slightly more than 1.5 Sol radii. This star is a Cepheid variable, and as such of interest to astrophysicists of all stripes. Henoz orbits a gas giant residing within the inner edge of the habitable region of this system. Historically, the Henoz system names seem to have been derived from the family names of the original settlers or ancient Terran cities. Culturally, the origins of Henoz are from a Terran Latin culture, possibly from the Mexican or Cuban regions.

Main Contents Stars Orbital Distances (AU)
* Central star * Primary White-Yellow, F3 V * Inner limit 1.9
* 1 terrestrial world * Temperature (K) 6800 * Inner life 1.600
* 2 Small Gas giants * Mass (sols) 1.55 * Snow line 4.02
* 2 Large Gas giants * *


Orbit SubOrbit Name Diameter Density Gravity Rotation Revolution e World Type
0.5 -- Gonzalez 25000 5.7 1.2 34.2h 630d 0.4 Gas Giant
1.25 -- Havana 42000 1.3 2.3 13.2h 1666.25d 0.02 Gas Giant
5 -- Maya 31000 0.9 1.2 21.7 34.2h 0.05 Gas Giant
12 -- Maria 16500 1.3 0.8 17.1h 41.5y 0.01 Ice Giant


  • Orbit is in AU or planetary radii for satellites
  • Diam = diameter in miles (X 1.609 for km)
  • Dens = average density in g/cc
  • Grav = 'surface' gravity in G's
  • Rot/Rev = rotation or revolution period in hours (h), days (d), or years (y) ; tl = tide-locked
  • e = orbital eccentricity
  • Type = G:Space/FI classification


A large gas giant with many moons. A fairly warm giant, with a constantly changing face.


A large gas giant with few moons, and a system police presence.


A small ice giant with few moons.

System Navigation[edit]

Henoz system can be divided into 3 distinct traffic areas.

The inner planet is rarely visited, being a distorted "hot Jupiter" with no moons; a science station is located in the shadow of that planet as a observatory of this arrangement. The science team there has dubbed this boiling planet "Doom", but its formal name is Gonzalez. There is a largely metallic asteroid belt separating Doom from the mid-system.

The inner Gas Giants, Havana and Maya, and their moons have a regular traffic pattern, with some fuel tenders and in-system police vessels. Henoz is the largest moon in the system, orbiting Havana along with a cloud of smaller moons. Maya is a gas giant with many moons, but few large enough to even consider for a small base. The Henoz system police nonetheless have made use of the 3 largest Mayan moons as SDC bases and supply depots. The largest such base is called simply P1, and essentially a excavated asteroid used as a stationary hull.

Going outwards, there is rocky asteroid belt and, further out, a typical ice giant, Maria. This area has traffic control sensors and navigation beacons, but ships have no reason to visit. It seems that the arrangement of the giant planets has precluded the formation of independent terrestrial planets.

History & Background (Dossier)[edit]

Imperial High (Landed) Nobility[edit]

Henoz, as a member world of the Third Imperium, holds the estates of two members of the Imperial Nobility, who are charged with overseeing the world.


Henoz is part of the 4-system County of Celepina. The worlds of the county are:

The capitol is currently Henoz City, and alternates with Juarez City every 10 years. The government is made of a quadricameral structure: Northern Assembly, Southern Assembly, Northern Synod, Southern Synod. The Northern structures create laws for the Northern region; the Southern structures for the Southern region. Laws passed passed by a simple majority in one region are then "offered" to the opposite structures, which may accept it without a vote or reject it by a super-majority of 60%. Rejected laws force a confirmation vote in the originating region, requiring a 60% super-majority to survive. Such "Split-Laws" are then considered to apply only the originating region. This style of government is very peculiar and has many eccentricities.

Laws pertaining the planetary interests (budget, military, star-town) are met in a bicameral structure.

The Executive wields the power of the military and directs the bureaucracy.

Unsurprisingly, there are Northern and Southern Supreme Courts, and a Court of Henoz to try to keep all laws and procedures straight.


Henoz has a mid-sized downport (called Henoz startown) for shuttles and smaller starships. The construction yard at the orbital port has a reputation for excellent quality work with reasonable delivery times. Be advised that military and scout ship requests will take precedence to commercial work. Read the small print before signing any service or repair authorizations if there are deadlines to be met!

The class-A downport is essentially three large concentric ring structures. Landing zones are spaced along these rings, with a rail system connecting the starport proper to the startown. There are heavy construction zones, and specialized launch sites for non-streamlined vessels. The main startown houses a city whose culture will be more familiar to travellers. All the services of an A-class starport are present including security, bonded warehouses and chandlers. The commercial area has banks, hotels, bars and restaurants, shops selling military surplus and catering to military tastes, as well as a strong flavour of "tourist-oriented" shops.


In addition to the star town, the equatorial plain areas are used for agriculture as the soil tends to be rich and fertile. Grains and sugars are common. Many plants have been engineered or bred to better survive the intense weather and low pressure. Most crops have biomechanisms to chelate the heavy metal particles. Some dry regions cultivate a type of cactus, which is used as a fruit and for distillation.

The mountain rings provide a source of metals from mining.

Most manufactories are located just outside the rings towards the polar climes, and use heavy-duty train systems to move goods to the cities and the startown. Argicultural technology, bio-engineering, pharmaceutical and chemical products are quite advanced.

System Military[edit]

Local Details There are usually no more than 6 SDBs in the system at any time, as Henoz is resource limited. The primary base is Henoz itself. This base is basic, but contains a functional spaceport capable of servicing the system SDBs. Two SDBs are stationed here, with regular deployments to reinforce operations at Maya. Two SDBs are usually hidden at Maya at or about P1. Two SDBs are found on local patrol around Havana.


Henoz is home to a relaxed culture. It is common for events to have 15 or even 30 minute leeway with its start and end times. The constantly shifting weather patterns makes this a practical attitude perhaps, as strong storms can appear within minutes. To counteract the loss of productivity inherent, there is a strong element of project management in most aspects of industry, education and government. It is this tendency to be organized within the chaos that allows Henoz to be successful.

Business hours are considered to be 10am - 7pm.

References & Contributors (Sources)[edit]

This list of sources was used by the Traveller Wiki Editorial Team and individual contributors to compose this article. Copyrighted material is used under license from Far Future Enterprises or by permission of the author. The page history lists all of the contributions.