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A red dwarf is a type of star described in the conventions of stellar classification as a small and relatively cool type M red star classified as a dwarf. (ST reference: Star Charts)


Two-thirds of all stars in the galaxy are M-type stars. (Last Unicorn RPG module: Star Trek: The Original Series Core Game Book, Decipher RPG module: Narrator's Guide)

The red dwarf type M0 V has an average brightness 0.01 that of Sol and mass 0.3 that of Sol. Its habitable zone ranges from 0.08 to 0.13 AU, and its gravitational influence reaches 3.6 AU. The red dwarf type M5 V has an average brightness 0.001 that of Sol and mass 0.2 that of Sol. Its habitable zone ranges from 0.0025 to 0.042 AU, and its influence reaches 1.6 AU. The age of these star types ranges from 8 to 24 billion years. (Decipher RPG module: Worlds)

Red dwarf stars remain unchanged for most of their existence, whereas brown dwarfs continually grow cooler. (TLE novel: The Buried Age)

They burn slower than other classes of stars. (Last Unicorn RPG module: Star Trek: The Next Generation Core Game Book, Decipher RPG module: Narrator's Guide)

Animals evolving on planets orbiting dim red dwarfs are more likely to develop a sense of infrared vision. (Star Trek Adventures RPG module: The Sciences Division)


In 2281, several Warrantors of Peace were abandoned by Romulans on a planetoid in a red dwarf binary star system. The binaries were responsible for producing Earth-normal gravity and double shadows. (TOS novel: Dwellers in the Crucible)

In 2376 in system SY-911, the Genesis Wave transformed a yellow giant into a red dwarf. (TNG - The Genesis Wave novel: Book 1)

In 2370, energy from star within the Jenolan Dyson Sphere was drained through subspace into the sphere, aging the star into a red dwarf. (TNG novel: Dyson Sphere)

Alternate realities

In July 2374 of the First Splinter timeline, while tracking Juliana Tainer's homing beacon aboard Archeus, Data investigated the fourth planet in an unnamed system consisting of a main sequence yellow star, a red dwarf, and six planets. It was located 416.2 light years from where he first picked up the signal, not far from Orion. (TNG - Cold Equations novel: The Persistence of Memory)

In 2380, the gas giant Gorsach V appeared to be collapsing into a red dwarf, but instead it was drawn into a quantum fissure and disappeared. (TNG novel: Q & A)

Red dwarfs

Red dwarf stars

Red dwarf binary stars



Stellar classification
By class and type class O blue-violet starclass B blue starclass A blue-white starclass F white star (white dwarf) • class G yellow star (yellow dwarfyellow giant) • class K orange star (orange giant) • class M red star (red dwarfred giant) • boson starbrown dwarfgreen starN-type starR-type starS-type starD-type star
By size or makeup black hole/black starcarbon stardwarf star (brown dwarfred dwarfwhite dwarfyellow dwarf) • giant star (blue giantred giantorange giantyellow giant) • Lazarus starmicrostarneutron star (collapsarmagnetarpulsar) • protostarsupergiant starvariable starwhite holeWolf-Rayet star


  1. 1.0 1.1 1.2 Last Unicorn RPG module: Planets of the UFP
  2. 2.0 2.1 2.2 2.3 2.4 Decipher RPG module: Worlds
  3. Star Trek Adventures RPG module: Beta Quadrant Sourcebook
  4. VOY novel: Pathways
  5. TOS novel: Spock's World
  6. ENT episode: "Shadows of P'Jem"
  7. 7.0 7.1 7.2 7.3 7.4 7.5 7.6 7.7 7.8 ST reference: Star Trek Maps
  8. 8.0 8.1 8.2 8.3 8.4 ST reference: Worlds of the Federation
  9. ENT novel: The Good That Men Do
  10. TOS - Rihannsu novel: The Empty Chair
  11. Last Unicorn RPG module: Raiders, Renegades & Rogues
  12. STO - From the Ashes mission: "Neutral No More"
  13. DS9 - Strange New Worlds II short story: "Change of Heart"
  14. Last Unicorn RPG module: Star Trek: Deep Space Nine - Narrator's Toolkit
  15. Last Unicorn RPG module: All Our Yesterdays: The Time Travel Sourcebook
  16. 16.0 16.1 Last Unicorn RPG module: Star Trek: The Original Series Core Game Book
  17. 17.0 17.1 Last Unicorn RPG module: The Andorians: Among the Clans
  18. 18.0 18.1 DTI novel: Forgotten History
  19. 19.0 19.1 ENT - Rise of the Federation novel: Tower of Babel
  20. DS9 - Prophecy and Change short story: "Chiaroscuro"
  21. TNG novel: Dyson Sphere
  22. VOY episode: "Time and Again"
  23. STO - Delta Quadrant mission: "Nanipia System Patrol"
  24. FASA RPG module: Denial of Destiny
  25. TOS - Myriad Universes - Infinity's Prism novel: A Less Perfect Union
  26. Last Unicorn RPG module: Star Trek: The Next Generation Core Game Book
  27. TOS novel: Federation
  28. TOS - The Yesterday Saga novel: Time for Yesterday
  29. TOS novel: Crisis on Centaurus
  30. 30.0 30.1 TLE novel: The Buried Age
  31. ENT - The Romulan War novel: Beneath the Raptor's Wing
  32. Star Trek Adventures RPG module: Hard Rock Catastrophe
  33. TOS novel: Twilight's End
  34. TOS - Rihannsu novel: My Enemy, My Ally
  35. FASA RPG module: The Orions: Book of Common Knowledge
  36. Star Trek Adventures RPG module: Strange New Worlds: Mission Compendium Vol. 2 mission: The Whole of the Law
  37. TNG - The Genesis Wave novel: Book 1
  38. Decipher RPG module: Narrator's Guide
  39. Stars article at ST website:
  40. DTI novel: Watching the Clock
  41. TOS novel: Seasons of Light and Darkness
  42. ENT - Rise of the Federation novel: A Choice of Futures

External links