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Arcturus nearby systems
Arcturus nearby systems
(Map Legend)
System Information
X:Y Coordinates -78.068 : 174.436[e]
Spectral class K2III[1][2]
Recharge time 193[1][2]
Recharge station(s) Nadir and Zenith[1][2]

The Arcturus system is the location of at least one inhabited world, Arcturus V, and as of June 3152 was the capital of the Tamar Pact.[3]

System Description[edit]

The Arcturus system is located near the Leganes and Qualip systems.[4]

System History[edit]

The Arcturus system was settled during or shortly after the First Exodus from Terra, and Arcturus was a part of the Tamar Pact prior to the formation of the Lyran Commonwealth in the first half of the twenty-fourth century.[5]

Political Affiliation[edit]

Arcturus V[edit]

Planetary Flag
Arcturus V
System position 5th[1][2]
Jump point
4.85 days[1][2]
Moons 3 (Donegal, Skye, Tamar)[1][2]
Surface gravity 1.02[1][2]
Atmospheric pressure Standard (Breathable)[1][2]
Equatorial temperature 33°C (Mild-Temperate)[1][2]
Surface water 43%[1][2]
Highest native life Mammal[1][2]
History and Culture
Population 1,013,000,000 (3067)[1]
1,000,000,000 (3079)[2]
Government and Infrastructure
Noble Ruler Duke of Arcturus
Political Leader Planetary Governor of Arcturus
Capital Malcheema[1][2]
HPG Class A[37][2]
HPG Representative Precentor Millicent Kellsy (3025)[37]

Arcturus V - more commonly known simply as Arcturus - is the fifth planet in the Arcuturus system and has served as the capital world of the Lyran Commonwealth. Arcturus has three moons named Donegal, Skye and Tamar.[1][2]

Planetary History[edit]

Arcturus was the original capital of the Lyran Commonwealth at their founding in 2341, home to Arcturan Arms and serving as seat of government to the Nine Archons. Eventually, with the Draconis Combine slowly gaining ground in the Tamar Pact to directly threaten Arcturus with an invasion, Archon Marsden proposed a switch of the capital to his own homeworld of Tharkad in the Donegal Protectorate, which was accepted by the other Archons.

The resulting population shift as inhabitants followed the capital has left a series of cities on the world that are vastly oversized for the current population. Many of the citizens moved to the countryside as well, making the cities feel even emptier. Several of these cities remain in use, but with dramatically reduced populations. Many of the rest of them have been destroyed by the environment as nature reclaims the land.[1]

Arcturus' economy shifted focus as well. No longer based on serving the politicians and government, agriculture instead forms the core of the planet's economy. The other noteworthy aspect of the citizenry is their strong (almost fanatical) support of the Steiner family. Many Arcturans joined the LCAF as soon as they can, eager to see more of the nation that their world formerly oversaw.[1]

The Jihad[edit]

On the 18th of February 3073 Archon Peter Steiner-Davion gave his blessing to a plan formed by Chandrasekhar Kurita, cousin to former Coordinator of the Draconis Combine Theodore Kurita, to build a base on Arcturus for use by a multinational coalition of forces Chandrasekhar had pulled together to oppose the Word of Blake.[38][39] Sorenson's Sabres were seen operating on Arcturus as a part of Chandrasekhar Kurita's hired forces later in 3073.[40]

On the 11th of May 3073 the Word of Blake attacked Arcturus, targeting the coalition of forces Chandrasekhar Kurita had assembled. Both sides took heavy losses, and yet while the Word of Blake forces had a tactical advantage over the collection of mercenary units and independent forces assembled by Chandrasekhar, the Blakists withdrew unexpectedly.[39][41] Among the casualties inflicted on the Blakists was the loss of a Union-class DropShip, destroyed by an ancient Vulture-class DropShip named the Samhain in service with the Devil's Brigade mercenary unit, a loss which earned the Samhain's pilot a reward for bravery from a grateful Lord Kurita.[42]

On the 15th of May 3074 Archon Adam Steiner announced his engagement to Heather Fyhne, daughter of Duchess Arielle Fyhne, the ruling Duchess of Arcturus.[43][44]


Having taken heavy damage during the nuclear raids conducted by the Word of Blake during the Jihad, the bulk of the military production on Arcturus had been destroyed; however, the ancient capital of the Alliance rebuilt some of the old armaments factories and began producing arms again, boosting the Alliance's production capabilities in a small way as the battered LAAF rebuilt.[45] In September 3081 Arcturan Arms told the Interstellar News Network that their refit facilities would be producing considerable numbers of the primitive Archer, Commando and Dervish for some decades yet, which the RetroTech 'Mechs seen as being ideal for organizations such as militia forces.[46]

Dark Age[edit]

Arcturus was conquered by Clan Wolf in 3128 in a battle which saw a company of LCAF 'Mechs fall to a single Crossbow pilot. The Arcturus Arms factory was subsequently used to mass produce that design for the Clan Wolf touman.[28]

Following Clan Wolf's migration in the late 3130s, Clan Jade Falcon claimed the now-abandoned Arcturus but neglected the Arcturus Arms factory and its Crossbow output.[28]

Military Deployment[edit]




  • First Arcturan Guards[49]




  • Twenty-third Arcturan Guards[52]
- At this point in time the 23rd operating at 30% of full strength, with 85% of their equipment featuring upgraded technology.




Planetary Locations[edit]

  • Malcheema: the planetary capital city[1][2]
    • Central Sector:[55]
    • Eastern Sector:[56]
    • Southeast Sector:[57]

Industrial Centers[edit]



Map Gallery[edit]

Nearby Systems[edit]

Closest 40 systems (39 within 60 light-years)
Distance in light years, closest systems first:
Leganes 14.2 Qualip 15.8 Lucianca 21.9 Garrison 25.8
Surcin 26.5 Apostica 26.5 Kelenfold 31.5 Ginestra 34.4
Breukelen 34.6 Grunwald 34.6 Carstairs 35.2 Borghese 36.1
Blue Diamond 37.1 Ganshoren 38.3 Kockengen 41.3 Morningside 42.9
Odessa 44.1 Auldhouse 44.4 Fatima 46.8 Symington 47.7
Porrima 50.3 Kirkcaldy 50.7 Meacham 51.0 Rasalgethi 52.3
Summit 52.4 Vaj 52.4 Orestes 52.4 Al Hillah 52.9
Yed Prior 52.9 Lyndon 54.0 Dalkeith 54.3 Tomans 55.0
Edasich 56.8 Crimond 57.0 Fort Loudon 57.4 Sakhalin 58.6
Karbala 58.7 Hillerod 59.8 Eaglesham 59.9 Pandora 60.7


  1. 1.00 1.01 1.02 1.03 1.04 1.05 1.06 1.07 1.08 1.09 1.10 1.11 1.12 1.13 1.14 1.15 1.16 Handbook: House Steiner, pp. 84–85: "Planet Profile"
  2. 2.00 2.01 2.02 2.03 2.04 2.05 2.06 2.07 2.08 2.09 2.10 2.11 2.12 2.13 2.14 2.15 Objectives: Lyran Alliance, p. 23
  3. 3.0 3.1 Tamar Rising, p. 72: "The Hinterlands June 3151" (Map)
  4. 4.0 4.1 Era Report: 2750, p. 37: "Inner Sphere - 2750"
  5. 5.0 5.1 5.2 Handbook: House Steiner, p. 13: "Tamar Pact world within the Lyran Commonwealth before [2340] and after at their founding in [2341]"
  6. Handbook: House Steiner, p. 25: "Lyran Commonwealth after Age of War [2571]"
  7. Historical: Reunification War, p. 159: "Inner Sphere Map [2596]"
  8. Historical: Liberation of Terra Volume 1, p. 11: "Inner Sphere - 2765"
  9. First Succession War, pp. 24–25: "Inner Sphere - [2786] Map"
  10. Handbook: House Steiner, p. 36: "Lyran Commonwealth after First Succession War [2822]"
  11. First Succession War, pp. 112–113: "Inner Sphere - [2822] Map"
  12. Handbook: House Steiner, p. 40: "Lyran Commonwealth after Second Succession War [2864]"
  13. Handbook: House Steiner, p. 47: "Lyran Commonwealth after Third Succession War [3025]"
  14. Handbook: House Steiner, p. 56: "Lyran Commonwealth after Fourth Succession War [3030]"
  15. Handbook: House Steiner, p. 59: "Lyran Commonwealth after War of 39 [3040]"
  16. Historical: War of 3039, p. 133: "Inner Sphere - 3040"
  17. Era Report: 3052, p. 11: "Inner Sphere - 3050"
  18. Handbook: House Steiner, p. 61: "Lyran Commonwealth after Clan Invasion [3052]"
  19. Era Report: 3052, p. 24: "Inner Sphere - 3052"
  20. Era Report: 3062, p. 11: "Inner Sphere Map [3057]"
  21. Era Report: 3062, p. 30: "Inner Sphere Map [3063]"
  22. Handbook: House Steiner, p. 70: "Lyran Commonwealth after FedCom Civil War [3067]"
  23. Jihad: Final Reckoning, p. 42: "Inner Sphere Map - [October 3067]
  24. Jihad Secrets: The Blake Documents, p. 65: "Inner Sphere [3075]"
  25. Field Report: LAAF, p. 21: "Lyran Alliance Armed Forces Deployment Map - August 3079"
  26. Jihad: Final Reckoning, p. 63: "Inner Sphere Map - [March 3081]"
  27. Field Manual: 3085, p. vii: "Inner Sphere Map - [October 3085]"
  28. 28.0 28.1 28.2 Recognition Guide: ilClan, vol. 17, p. 12: "Crossbow" entry
  29. Era Report: 3145, p. 11: "Inner Sphere Map - [3135]"
  30. 30.0 30.1 30.2 30.3 Tamar Rising, p. 25: "Identity Crisis"
  31. Era Report: 3145, p. 39: "Inner Sphere Map - [3145]"
  32. Field Manual: 3145, p. VI: "Inner Sphere - 3145"
  33. Shattered Fortress, p. 103: "Inner Sphere 3151" (Map)
  34. The Price of Duty, ch. 1
  35. Tamar Rising, p. 27: "Growing Pains"
  36. Tamar Rising, poster map
  37. 37.0 37.1 House Steiner (The Lyran Commonwealth), p. 175: "Planet Guide"
  38. Jihad Hot Spots: 3076, p. 26: "Timeline of the Jihad"
  39. 39.0 39.1 Jihad: Final Reckoning, p. 51: "The Jihad In Review"
  40. Jihad Turning Points: Luthien, pp. 6–7: "Combatants"
  41. Jihad Hot Spots: 3076, p. 31: "Timeline of the Jihad"
  42. Technical Readout: 3075, p. 214: "Vulture"
  43. Jihad Hot Spots: 3076, p. 52: "Timeline of the Jihad"
  44. Jihad: Final Reckoning, p. 52: "The Jihad In Review"
  45. Jihad: Final Reckoning, p. 85: "Donegal Province"
  46. Jihad: Final Reckoning, p. 33: "The Retro Wave"
  47. Field Manual: SLDF, p. 255: "SLDF - Lyran Commonwealth Military Command Map"
  48. Field Report 2765: LCAF, p. 9: "Regimental Status"
  49. First Succession War, p. 139: "First Succession War Deployment Table - LCAF"
  50. Historical: War of 3039, p. 137: "Deployment Table"
  51. Jihad Secrets: The Blake Documents, p. 110: "Word of Blake Mercenary Deployment"
  52. Field Report: LAAF, p. 10: "Arcturan Guards Regimental Status"
  53. 53.0 53.1 Field Manual: 3085, p. 109: "Deployment Table - 3085"
  54. Field Manual: 3145, p. 168: "Epsilon Galaxy"
  55. Elements of Treason: Duty, ch. 2
  56. Elements of Treason: Duty, ch. 5
  57. Elements of Treason: Duty, ch. 12