The Cauldron
The Cauldron Nebula is a reflection nebula located within the heart of Cauldron Sector, within the Where The Stars End region of the Empty Stars.
- It is an astrographic feature and a nebula.
- It is part of Uncharted Space.
Description (Specifications)
The Cauldron nebula is a large group of bright nebulae and dark clouds measuring around 20 parsecs coreward-rimward by 15 parsecs spinward-trailing.
- It is classified as a reflection nebula and is primarily formed of ionized gases, thrown off by the giant stars at its center many millennia ago.
- The gases consist of about 90% hydrogen (H2), with the remainder made up of varying concentrations of helium (He), oxygen (O2), nitrogen (N2), and other elements. The clouds have a mean density of 102–106 particles/cm³.
It is considered to contain 32 separate stars of varying ages grouped into twelve separate star systems. These include x2 Bright Giants, x6 Giants, x5 Subgiants, x11 Main Sequence, x1 Subdwarf, and x7 Dwarfs.
Image Repository
:
The systems at the heart of the Cauldron nebula.
Garazal System
Hex location: Cauldron Sector 1720
Garazal has three stars in the star system. Garazal 
Type Category Mass (Sol) Temperature (K) Luminosity G4 IV Subgiant 1.95 4800 - 5700 5.22 Unit Diameter Safe Distance Habitable Zone Jump Shadow M-Drive Limit AU 0.0255 0.1895 1.82 - 2.96 2.55 25.5 Orbit # * 0 5 5 8 Remarks None Garazal 
Type Category Mass (Sol) Temperature (K) Luminosity M0 V Main Sequence (Dwarf) 0.57 3770 - 3850 0.13982 Unit Diameter Safe Distance Habitable Zone Jump Shadow M-Drive Limit AU 0.0055 0.031 0.39 - 0.74 0.55 5.5 Orbit # * * 2 1 6 Remarks Orbits primary at 2200 AU Garazal
Type Category Mass (Sol) Temperature (K) Luminosity M1 V Main Sequence (Dwarf) 0.5 3620 - 3660 0.08839 Unit Diameter Safe Distance Habitable Zone Jump Shadow M-Drive Limit AU 0.0047 0.0247 0.31 - 0.59 0.47 4.7 Orbit # * * 1 1 6 Remarks Orbits secondary at 0.7 AU
System Diagram:
A basic astrographic chart of the Garazal system, lying in the the heart of the Cauldron Nebula.
System Components:
x4 planetoid belts, no other significant bodies.
Three vast belts, made up of fine particles and divided by ill-defined transition zones, lie around the primary star. The inner belt is largely made up of metallic and stony materials, the outer belt contains a higher percentage of frozen volatiles, while the middle transition zone belt is a mixture of the two and contains the largest individual bodies, some weighing as much as a few grams.
A broad belt made up of fine particles orbits the distant binary pair companion stars.
The transition zone belt orbiting the primary star is nominally the mainworld.
- Mainworld UWP: ?000???-? As Va
Astrograpic Dangers
The Garazal system is considered a hazard to navigation and health and is classified as a Red Zone:
- A miasma of molecular particles sleets through the system. This interferes with communications and sensors.
- Occasionally, a particularly dense pocket of material may gain enough static charge to trigger a powerful plasma discharge.
- Radiation levels within the inner system are significantly elevated, rising to as high as 300 Rads per hour.
- Both of the companion stars are Flare Stars and are active EM transmitters.
Hergan System
Hex location: Cauldron Sector 1721
| Hergan | ||||||
|---|---|---|---|---|---|---|
|
Type | Category | Mass (Sol) | Temperature (K) | Luminosity | |
| M3 III | Giant | 6.96 | 2300 - 3100 | 1556 | ||
| Unit | Diameter | Safe Distance | Habitable Zone | Jump Shadow | M-Drive Limit | |
| AU | 1.5074 | 3.27182 | 31.36 - 51.12 | 150.74 | 1507.4 | |
| Orbit # | 4 | 5 | 9 | 11 | 14 | |
| Remarks | None | |||||
| Hergan | ||||||
|
Type | Category | Mass (Sol) | Temperature (K) | Luminosity | |
| K0 IV | Subgiant | 2.3 | 4000 - 5000 | 4.67 | ||
| Unit | Diameter | Safe Distance | Habitable Zone | Jump Shadow | M-Drive Limit | |
| AU | 0.03071 | 0.17924 | 1.72 - 2.8 | 3.071 | 30.71 | |
| Orbit # | * | 0 | 5 | 5 | 9 | |
| Remarks | Orbits primary at 4.8 AU | |||||
System Diagram:
A basic astrographic chart of the Hergan system, lying in the the heart of the Cauldron Nebula.
System Components:
x2 planetoid belts, x3 small gas giants, no other significant bodies.
The two stars orbit a barycenter and the region of space immediately around the pair is relatively clear. Two vast distinct belts lie around the stars. The inner belt is largely made up of metallic and stony materials with a maximum size of around a kilogram, while the outer belt contains finer particles with a higher percentage of frozen volatiles. Beyond them are three small spectacularly ringed gas giant worlds, all lacking moons and with eccentric, unstable orbits.
The outer belt (specifically the inner edge of that belt) is nominally the mainworld.
- Mainworld UWP: ?000???-? As Va
Astrograpic Dangers
The Hergan system is considered a hazard to navigation and health and is classified as a Red Zone:
- A miasma of molecular particles sleets through the system. This interferes with communications and sensors.
- Occasionally, a particularly dense pocket of material may gain enough static charge to trigger a powerful plasma discharge.
- Radiation levels within the inner system are significantly elevated, rising to as high as 150 Rads per hour.
Izix System
Hex location: Cauldron Sector 1818
Izix has four stars in the star system. Izix 
Type Category Mass (Sol) Temperature (K) Luminosity A2 II Bright Giant 12.8 8600 - 9400 1660 Unit Diameter Safe Distance Habitable Zone Jump Shadow M-Drive Limit AU 0.1526 3.3794 32.39 - 52.8 15.26 152.6 Orbit # 0 5 9 8 11 Remarks None Izix 
Type Category Mass (Sol) Temperature (K) Luminosity K1 III Giant 4.2 3800 - 4800 140 Unit Diameter Safe Distance Habitable Zone Jump Shadow M-Drive Limit AU 0.19726 0.98141 9.41 - 15.33 19.726 197.26 Orbit # 0 3 7 8 11 Remarks Orbits primary at 150 AU Izix
Type Category Mass (Sol) Temperature (K) Luminosity M8 V Main Sequence (Dwarf) 0.085 2420 - 2570 0.00018 Unit Diameter Safe Distance Habitable Zone Jump Shadow M-Drive Limit AU 0.0011 0.0011 0.01 - 0.03 0.11 1.1 Orbit # * * * 0 3 Remarks Orbits secondary at 3 AU Izix 
Type Category Mass (Sol) Temperature (K) Luminosity D White Dwarf 0.53 6800 - 6800 0 Unit Diameter Safe Distance Habitable Zone Jump Shadow M-Drive Limit AU 0.00011 0.00168 0 - 0.03 0.011 0.11 Orbit # * * * * 0 Remarks Orbits primary at 900 AU
System Diagram:
A basic astrographic chart of the Izix system, lying in the the heart of the Cauldron Nebula.
System Components:
x4 planetoid belts, x3 small gas giants, no other significant bodies.
Two vast belts made up of fine particles lie around the primary star. The inner belt is largely made up of metallic and stony materials while the outer belt contains a higher percentage of frozen volatiles. Beyond them are two small spectacularly ringed gas giant worlds, both lacking moons and with eccentric, unstable orbits.
The secondary and tertiary stars are a binary pair that orbit a barycenter and in turn orbit the primary. They are surrounded by a broad planetoid belt made up of fine particles and a small spectacularly ringed gas giant with a gradually decaying orbit.
The system fringe is marked by a tiny white dwarf star that retains a broad belt made up of fine particles.
The inner edge of the outer belt orbiting the primary star is nominally the mainworld.
- Mainworld UWP: ?000???-? As Va
Astrograpic Dangers
The Izix system is considered a hazard to navigation and health and is classified as a Red Zone:
- A miasma of molecular particles sleets through the system. This interferes with communications and sensors.
- Occasionally, a particularly dense pocket of material may suffer a plasma discharge.
- Radiation levels within the inner system are significantly elevated, rising to as high as 200 Rads per hour.
- The small dim red Far Companion B is a violent Flare Star and is an active EM transmitter.
Kuruhuk System
Hex location: Cauldron Sector 1819, 3 Gas Giants
Kuruhuk has three stars in the star system. Kuruhuk 
Type Category Mass (Sol) Temperature (K) Luminosity F7 IV Subgiant 1.9 5800 - 6500 9.8 Unit Diameter Safe Distance Habitable Zone Jump Shadow M-Drive Limit AU 0.02382 0.25966 2.49 - 4.06 2.382 23.82 Orbit # * 0 5 5 8 Remarks None Kuruhuk 
Type Category Mass (Sol) Temperature (K) Luminosity K1 V Main Sequence (Dwarf) 0.86 5100 - 5170 0.58985 Unit Diameter Safe Distance Habitable Zone Jump Shadow M-Drive Limit AU 0.0074 0.0637 0.76 - 1.36 0.74 7.4 Orbit # * * 3 2 6 Remarks Orbits primary at 2.8 AU Kuruhuk
Type Category Mass (Sol) Temperature (K) Luminosity D White Dwarf 0.53 6800 - 6800 0 Unit Diameter Safe Distance Habitable Zone Jump Shadow M-Drive Limit AU 0.00011 0.00168 0 - 0.03 0.011 0.11 Orbit # * * * * 0 Remarks Orbits secondary at 0.4 AU
System Diagram:
A basic astrographic chart of the Izix system, lying in the the heart of the Cauldron Nebula.
TBD
System Components:
x4 planetoid belts, x3 small gas giants, no other significant bodies.
Two vast belts made up of fine particles lie around the primary star. The inner belt is largely made up of metallic and stony materials while the outer belt contains a higher percentage of frozen volatiles. Beyond them are two small spectacularly ringed gas giant worlds, both lacking moons and with eccentric, unstable orbits.
The secondary and tertiary stars are a binary pair that orbit a barycenter and in turn orbit the primary. They are surrounded by a broad planetoid belt made up of fine particles and a small spectacularly ringed gas giant with a gradually decaying orbit.
The system fringe is marked by a tiny white dwarf star that retains a broad belt made up of fine particles.
The inner edge of the outer belt orbiting the primary star is nominally the mainworld.
- Mainworld UWP: ?000???-? As Va
Hex location: Cauldron Sector 1822, 4 Gas Giants
Cauldron XI-a has a solitary primary star. Cauldron XI-a
Type Category Mass (Sol) Temperature (K) Luminosity K4 V Main Sequence (Dwarf) 0.73 4440 - 4600 0.33238 Unit Diameter Safe Distance Habitable Zone Jump Shadow M-Drive Limit AU 0.0066 0.0478 0.58 - 1.07 0.66 6.6 Orbit # * * 2 2 6 Remarks None
Hex location: Cauldron Sector 1915, 1 Gas Giant
Cauldron VII-abc has three stars in the star system. Cauldron VII-abc 
Type Category Mass (Sol) Temperature (K) Luminosity M6 III Giant 7.85 2000 - 2800 2382.5 Unit Diameter Safe Distance Habitable Zone Jump Shadow M-Drive Limit AU 2.42859 4.04857 38.81 - 63.25 242.859 2428.59 Orbit # 5 6 9 12 15 Remarks None Cauldron VII-abc
Type Category Mass (Sol) Temperature (K) Luminosity M1 V Main Sequence (Dwarf) 0.5 3620 - 3660 0.08839 Unit Diameter Safe Distance Habitable Zone Jump Shadow M-Drive Limit AU 0.0047 0.0247 0.31 - 0.59 0.47 4.7 Orbit # * * 1 1 6 Remarks Orbits primary at 10 AU Cauldron VII-abc
Type Category Mass (Sol) Temperature (K) Luminosity M9 VI Main Sequence (Subdwarf) 0.058 1900 - 2400 0 Unit Diameter Safe Distance Habitable Zone Jump Shadow M-Drive Limit AU 0.00049 0.00064 0.01 - 0.01 0.049 0.49 Orbit # * * * * 1 Remarks Orbits primary at 41 AU
Hex location: Cauldron Sector 1920, 4 Gas Giants
Cauldron IV-abc has three stars in the star system. Cauldron IV-abc
Type Category Mass (Sol) Temperature (K) Luminosity K1 III Giant 4.2 3800 - 4800 140 Unit Diameter Safe Distance Habitable Zone Jump Shadow M-Drive Limit AU 0.19726 0.98141 9.41 - 15.33 19.726 197.26 Orbit # 0 3 7 8 11 Remarks None Cauldron IV-abc
Type Category Mass (Sol) Temperature (K) Luminosity M0 V Main Sequence (Dwarf) 0.57 3770 - 3850 0.13982 Unit Diameter Safe Distance Habitable Zone Jump Shadow M-Drive Limit AU 0.0055 0.031 0.39 - 0.74 0.55 5.5 Orbit # * * 2 1 6 Remarks Orbits primary at 1 AU Cauldron IV-abc
Type Category Mass (Sol) Temperature (K) Luminosity D White Dwarf 0.53 6800 - 6800 0 Unit Diameter Safe Distance Habitable Zone Jump Shadow M-Drive Limit AU 0.00011 0.00168 0 - 0.03 0.011 0.11 Orbit # * * * * 0 Remarks Orbits secondary at 0.2 AU
Hex location: Cauldron Sector 1922, 1 Gas Giant
| Cauldron V-ab | ||||||
|---|---|---|---|---|---|---|
|
|
Type | Category | Mass (Sol) | Temperature (K) | Luminosity | |
| M2 III | Giant | 6.74 | 2400 - 3300 | 1194 | ||
| Unit | Diameter | Safe Distance | Habitable Zone | Jump Shadow | M-Drive Limit | |
| AU | 1.20034 | 2.86607 | 27.47 - 44.78 | 120.034 | 1200.34 | |
| Orbit # | 3 | 5 | 9 | 11 | 14 | |
| Remarks | None | |||||
| Cauldron V-ab | ||||||
|
Type | Category | Mass (Sol) | Temperature (K) | Luminosity | |
| M1 V | Main Sequence (Dwarf) | 0.5 | 3620 - 3660 | 0.08839 | ||
| Unit | Diameter | Safe Distance | Habitable Zone | Jump Shadow | M-Drive Limit | |
| AU | 0.0047 | 0.0247 | 0.31 - 0.59 | 0.47 | 4.7 | |
| Orbit # | * | * | 1 | 1 | 6 | |
| Remarks | Orbits primary at 39 AU | |||||
Hex location: Cauldron Sector 1923, 3 Gas Giants
Cauldron IX-abc has three stars in the star system. Cauldron IX-abc
Type Category Mass (Sol) Temperature (K) Luminosity F0 IV Subgiant 2.5 6900 - 7400 19 Unit Diameter Safe Distance Habitable Zone Jump Shadow M-Drive Limit AU 0.02512 0.36154 3.47 - 5.65 2.512 25.12 Orbit # * 1 6 5 8 Remarks None Cauldron IX-abc
Type Category Mass (Sol) Temperature (K) Luminosity G0 IV Subgiant 1.75 5400 - 6100 6.5 Unit Diameter Safe Distance Habitable Zone Jump Shadow M-Drive Limit AU 0.02326 0.21147 2.03 - 3.3 2.326 23.26 Orbit # * 0 5 5 8 Remarks Orbits primary at 0.7 AU Cauldron IX-abc
Type Category Mass (Sol) Temperature (K) Luminosity M2 V Main Sequence (Dwarf) 0.44 3470 - 3560 0.0565 Unit Diameter Safe Distance Habitable Zone Jump Shadow M-Drive Limit AU 0.0041 0.0197 0.25 - 0.48 0.41 4.1 Orbit # * * 1 1 6 Remarks Orbits primary at 950 AU
Hex location: Cauldron Sector 2021, 0 Gas Giants
Cauldron XII-a has a solitary primary star. Cauldron XII-a
Type Category Mass (Sol) Temperature (K) Luminosity D White Dwarf 0.53 6800 - 6800 0 Unit Diameter Safe Distance Habitable Zone Jump Shadow M-Drive Limit AU 0.00011 0.00168 0 - 0.03 0.011 0.11 Orbit # * * * * 0 Remarks None
Hex location: Cauldron Sector 2122, 2 Gas Giants
Cauldron III-abc has three stars in the star system. Cauldron III-abc 
Type Category Mass (Sol) Temperature (K) Luminosity A3 III Giant 10.2 8400 - 9100 166 Unit Diameter Safe Distance Habitable Zone Jump Shadow M-Drive Limit AU 0.04876 1.06866 10.24 - 16.7 4.876 48.76 Orbit # * 3 7 6 9 Remarks None Cauldron III-abc 
Type Category Mass (Sol) Temperature (K) Luminosity F7 V Main Sequence (Dwarf) 1.21 6180 - 6280 1.94872 Unit Diameter Safe Distance Habitable Zone Jump Shadow M-Drive Limit AU 0.0123 0.1158 1.29 - 2.24 1.23 12.3 Orbit # * 0 4 3 7 Remarks Orbits primary at 2000 AU Cauldron III-abc
Type Category Mass (Sol) Temperature (K) Luminosity D White Dwarf 0.53 6800 - 6800 0 Unit Diameter Safe Distance Habitable Zone Jump Shadow M-Drive Limit AU 0.00011 0.00168 0 - 0.03 0.011 0.11 Orbit # * * * * 0 Remarks Orbits secondary at 10 AU
Hex location: Cauldron Sector 2320, 0 Gas Giants
Cauldron II-abcd has four stars in the star system. Cauldron II-abcd 
Type Category Mass (Sol) Temperature (K) Luminosity G3 II Bright Giant 9.24 4900 - 5800 668 Unit Diameter Safe Distance Habitable Zone Jump Shadow M-Drive Limit AU 0.29962 2.14375 20.55 - 33.49 29.962 299.62 Orbit # 0 4 8 8 12 Remarks Cauldron II-abcd
Type Category Mass (Sol) Temperature (K) Luminosity D White Dwarf 0.53 6800 - 6800 0 Unit Diameter Safe Distance Habitable Zone Jump Shadow M-Drive Limit AU 0.00011 0.00168 0 - 0.03 0.011 0.11 Orbit # * * * * 0 Remarks Orbits primary at 1.7 AU Cauldron II-abcd
Type Category Mass (Sol) Temperature (K) Luminosity M0 V Main Sequence (Dwarf) 0.57 3770 - 3850 0.13982 Unit Diameter Safe Distance Habitable Zone Jump Shadow M-Drive Limit AU 0.0055 0.031 0.39 - 0.74 0.55 5.5 Orbit # * * 2 1 6 Remarks Orbits primary at 320 AU Cauldron II-abcd
Type Category Mass (Sol) Temperature (K) Luminosity D White Dwarf 0.53 6800 - 6800 0 Unit Diameter Safe Distance Habitable Zone Jump Shadow M-Drive Limit AU 0.00011 0.00168 0 - 0.03 0.011 0.11 Orbit # * * * * 0 Remarks Orbits secondary at 0.4 AU
History & Background (Dossier)
The positions and types of the stars present within The Cauldron have been cataloged as part of the University of Tal Varisa Deep Sky Program. A note within the Zelig Journal indicates that one or more scout vessels of the Last Armada may have journeyed into The Cauldron as they passed through the Cauldron Cluster.
Image Repository
Worlds & Sectors (Astrography)
This astrographic feature is primarily found in the following areas:
Uncharted Space:
World Listing: 1105
The following systems and worlds are associated with this astrographic feature:
References & Contributors (Sources)
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- Traveller Wiki Editorial Team
- Author & Contributor: Lord (Marquis) and Master Scout Emeritus Adie Alegoric Stewart of the IISS
- Author & Contributor: WHULorigan
- Author & Contributor: Lord (Marquis) and Master of Sophontology Maksim-Smelchak of the Ministry of Science