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Alpamis (Pi Mensae)
Pi Mensae
Image from Steve Bowers

Alpamis System - Data Panel

SystemLocation:
- Distance from Merrion (Alpha Mensae): 26.72 ly (J2000)
- Distance from Sol: 59.65 ly (J2000)
- Constellation: Mensa
StarNames: Alpamis, Pi Mensae, GJ 9189, HD 39091, HIP 26394, HR 2022
Physical characteristics:
- Mass: 1.07 x Sol
- Radius: 1.190 x Sol
- Luminosity: 1.651 x Sol (bolometric)
- Temperature: 5,998 Kelvin
- Spectral type: G0 V
- Age: 3.92 billion years
System: The star and its planets were named during the Information Age after figures from the old Earth Turkic epic Alpamysh.

1) Karajan: Videntian PyroazuriTerrestrial CereYdratian AquaCytherean
Semi-major axis = 0.068 AU, Orbital period = 6.268 days, Eccentricity = 0, Mass = 3.63 x Earth, Radius = 2.11 x Earth

2) Kaykubat: Videntian TholiNeptunian CereJotunnian AquaCytherean
Semi-major axis = 0.499 AU, Orbital period = 124.6 days, Eccentricity = 0.220, Mass = 13.38 x Earth, Radius = 3.765 x Earth

3) Barchin: Ikarian TholiJovian HydrogeoBarian
Semi-major axis = 3.27 AU, Orbital period = 5.718 years, Eccentricity = 0.640, Mass = 12.6 x Jupiter, Radius = 11.06 x Earth

Reached1831, by colonists aboard the Kadoluk.

MoonsMoons of Barchin
1) Psittacus:
Semi-major axis = 2,022,007 km, Orbital period = 5.234 days, Mass = 1.264E+23 kg, Radius = 1,969.5 km
2) Alauda:
Semi-major axis = 2,655,463 km, Orbital period = 7.876 days, Mass = 5.270E+22 kg, Radius = 1,545.8 km
3) Corvus:
Semi-major axis = 4,225,115 km, Orbital period = 15.81 days, Mass = 3.257E+23 kg, Radius = 2,753.2 km

The Alpamis system was first colonized by parrot provolves aboard the Kadoluk, who settled on the satellites of Barchin, the large jovian planet in an eccentric orbit. They named their new homes after various genera of Old Earth birds - the three largest satellites are named Corvus, Psittacus, and Alauda (while the planet itself simply received the name Pimensaeb, a defiance of the Information Age name that was apparently intended to be humorous). The highly variable illumination the Ikarian planet and its moons receive mean an uncontrolled environment would experience periodic extreme weather contrasts over the course of a planetary year; the first paraterraformed domes, located on Alauda, either simply opted for opaque shells with artificial lighting or used environment control systems to supply additional starlight during the long and cold winters, but over the next few thousands of years more and more habitats happily adapted to the changing levels of sunlight.

Currently a minor NoCoZo system, directly connected to the wormhole Relay system of Beta Trianguli Australis, which also possesses links to the major NoCoZo systems of Merrion (Alpha Mensae) and Frei (Zeta Doradus).

 
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Development Notes
Text by Updated by The Astronomer 2022
From an original article by M. Alan Kazlev
Initially published on 31 December 2001.

Updated in 2022 to expand system data, incorporate two real planets (Pi Mensae c, discovered and confirmed in 2018, known in-universe as Karajan, and Pi Mensae d, discovered/confirmed in 2020/2022, known in-universe as Kaykubat), and update parameters of all planets. More data on the star and its planets can be found at https://arxiv.org/abs/2007.06410 and https://arxiv.org/abs/2203.01018 . The moons of Barchin are completely fictional.
 
 
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