An Orbit is a largely stable relationship around an astrographic object.
Library Data Referral Tree
- Observing Charted Space
- Universal World Profile (UWP)
- PBG Sequence
- COG Sequence
- Other System Data
Orbital Definitions: Each orbit should be understood as a generalized band into which an astronomic object such as a planet, belt, or related object may occupy. There are no set distances for each orbit or band, which are determined by the star or stars centered the system.Orbital bands are typically measured in AU or Astronomical Units and the distance between bands is variable.
Generalized Orbit Representation
- Orbit 0 represent an orbit extremely close to the sun and quite dangerous due to solar flares and the like. Only a Twilight Zone World could exist in that orbit and even that is not likely to be safe within the time spans of stars. they might be safe for settlement or mining within the time spans of sophonts, although only with very good technology or an unconventional lifeform suited to the extreme heat. Possibly under other rare conditions.
- Orbits 1 to 6 represent the inner worlds of a system.
- Symbolic orbit 6.5 HZ, the Habitable Zone is the Goldilocks area where conventional life has the greatest odds of developing.
- Orbits 7 to 12 represent the outer worlds of a system.
- Orbits 13 to 144 represent the remote system of Kuiper Belts and Trans-Neptunian Objects.
- Orbits 145 to the edge of an astrographic hex or parsec represent the far system where Oort Clouds and the Hill Sphere is located.
Star System Locations
|Type||World Band||Orbit||Estimated Distance||Location/s||Solar Region||Grav. Relationship||Remarks|
|Star||Very Rare||0 (zero)||Center (zero)||Star||Star||Source||Astronomic but not astrographic centerpoint.|
|Inner System||Inner Zone||1 to 6||Up to 42 Light Minutes||HZ Neg||Heliosphere||Significant gravity||Warmer Worlds|
|HZ||Goldilocks Zone||Variable (Orbit 6.5 Symbolically)||Variable||HZ||Heliosphere||Significant gravity||Just right. Goldilocks Zone. Liquid water.|
|Outer System||Outer Zone||7 to 12||Up to 42 Light Hours||HZ Plus||Heliosphere||Significant gravity||Colder worlds.|
|Remote System||Rogue Worlds||13 to 144||Up to 2 Light Weeks||Remote System||Heliosphere to Heliopause to Interstellar Medium||Insignificant gravity||Kuiper Belt. Trans-Neptunian Objects.|
|Far System||Rogue Worlds||Orbit 145 to (3.27 parsecs)||To limits of an area of a one Parsec volumetric cube||Far System||Interstellar Medium||Very weak gravity||Oort Cloud/s. Hill Sphere.|
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- Marc Miller. Imperial Encyclopedia (Game Designers Workshop, 1987), TBD.
- Frank Chadwick, Dave Nilsen. Traveller: The New Era (Game Designers Workshop, 1993), 192. (Main Rulebook)
- Martin Dougherty. A Guide to Star Systems (Mongoose Publishing, 2015), TBD.
- Marc Miller. T5 Core Rules (Far Future Enterprises, 2013), TBD.
- Traveller Wiki Editorial Team
- Author & Contributor: Lord (Marquis) and Master of Sophontology Maksim-Smelchak of the Ministry of Science