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THE ISIS SYSTEM: Summary |
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The
Isis system is one of the few regarded human colony systems, though its
inhabitants are from throughout the federation, the human population is
the largest though not by much (human population ~520 million, Panatrak
~490million, Galen ~430million, Trenoc ~430 million). The two planets
also have small colonies of the Pholi, who are rare to be found
colonising new planets, their population is not precisely known, as most
of them exist rather separately from federation society, but a good
estimate is along the lines of 540,000. Sun: Name:
Ra Class:
F9 V Luminosity:
1.29x sol Radius:
1.03x sol Surface
temperature: 6110K Rotational
period: 15 days Summary:
An unusual star for a system containing two life bearing planets. Both temperature
and luminosity are a little higher than sol's, and its rapid rotation
suggest a relatively young star, but it is unusual for a system with
many planets. Planet: Name:
Ptah Mean
orbital radius: 46m km Rotational
period 55.52days (tidally locked) Planetary
diameter: 5300 km Year
length: 55.52 days Average
temp: illuminated side 490K, dark side 40K Atmosphere:
Effectively none, some helium and other heavier solar flux atoms are
transiently captured, and the cool side to the planet has an extremely
tenuous atmosphere, less than a billionth of a millibar, and the sun
side much less than this. The cold side has also accumulated some
volatiles, ice mostly from collisions. Density:
6.13g/cm^3 Surface
g: 5.45m/s/s Axial
inclination: 5° Magnetic
field: trace, but stable, presumed fossil field, the high metal content
of the planet also helps Moons:
None Summary:
Airless mercury like planet Planet: Name:
Apis Mean
orbital radius: 71m km Rotational
period 74 hrs Planetary
diameter: 4700 km Year
length: 105.69days Average
temp: illuminated side ~380K, dark side ~140K, Atmosphere:
Effectively none, trace captured solar flux Density:
4.95g/cm^3 Surface
g: 3.25m/s/s Axial
inclination: 2° Magnetic
field: trace, but stable Moons:
None Summary:
Airless mercury like planet Planet: Name:
Isis Mean
orbital radius: 175m km Rotational
period 16.25hrs Planetary
diameter: 13100 km Year
length: 413.33 days Average
temp: illuminated side, 300K Atmosphere:
Pressure: 0.7 bar
Composition: 70%
nitrogen
23% oxygen
2% carbon dioxide
2% noble gases, argon, krypton for most parts
1% water vapour and others, ozone varies widely.
Summary: Atmosphere poses certain problems for habitation, and
for this reason is far less populated that Osiris, long periods of
acclimatization allow all federation races to survive, though the
elderly and certain others fare less well, and are better suited to
another world. Density:
5.5.68g/cm^3 Surface
g: 10.41m/s/s Axial
inclination: 5° Magnetic
field: strong, fluctuating, but strength stable Moons:
One large moon Summary:
Life bearing planet, more information Planet: Name:
Osiris Mean
orbital radius: 189m km Rotational
period: 32.10hrs Planetary
diameter: 12600 km Year
length: 463.91 days Average
temp: illuminated side, 287K Atmosphere:
Pressure: 1.2 bar
Composition: 75%
nitrogen
18% oxygen
5% argon
2% mostly water vapour, carbon dioxide
Summary, breathable to all federation races, high partial
pressure of oxygen sometimes problematic at sea level Density:
5.42g/cm^3 Surface
g: 9.54m/s/s Axial
inclination: 21° Magnetic
field: strong, but a rapid in reversing polarity. Moons:
two major moons Summary:
Life bearing planet, more information Planet: Name:
Thoth Mean
orbital radius: 2250m km (Though
most planets do not have perfectly circular orbit, Thoth has an extreme
eccentricity of 0.4 (on 0-1 scale). The extremes of its orbit lie
between 1350m km and 3150m km from the sun, Ra) Rotational
period: 15.70hrs Planetary
diameter: 154000 km Year
length: 52.17 years Average
temp: illuminated side, 120K Atmosphere:
extensive, mostly hydrogen and helium, other more complex molecules at
different layers. Density:
1.42g/cm^3 Surface
g: 30.46m/s/s Axial
inclination: 9° Magnetic
field: extremely strong, typical large gas giants Moons:
8 major moons, though no ring systems. Many smaller captured objects
found in a plane 2m km+ thought to be captured as the planet proceeds
round its eccentric orbit, and the angle more indicates the effects of
the sun rather than the planet. Summary:
Thoth is a supra-jovian, though in this system behaves very much like
any other systems set of gas giants. It eccentric orbit and its strong
gravitational field perturb many of the systems planets, and seemed to
have prevented formation of regular asteroid belts. Extra
system notes: Thoth’s
effect on the system has scattered most of the usual remnants of system
formation and so no major belts have formed. Most of the larger
asteroids have stable orbits that are harmonic to Thoth’s,
others roam in and out of the plane. There are six harbour
asteroids that have been hollowed and de-spun, these provide a set of
space ports in this system, though lack of raw material means that no
active ship building takes place in these. Osiris
and Isis orbit relatively close to each other but there orbits are
stable for the fact that Osiris is also slightly out of plane with Isis,
and both follow quite elliptical orbits, so in reality the planets never
get within 30 million kilometres of each other. The
system's sun, Ra, has a pronounced effect on Isis’ atmosphere. Ozone
levels in the planets atmosphere are directly related to violence of the
solar weather directed at Isis, in severe stormy times the level of
ozone can triple in Isis’ atmosphere, with the concentrations being
problematic to health in the polar regions. Osiris suffers much less of
this problem, and certainly fluctuations in ozone never endanger the
health. This is partly because it lies out of plane, and this reduces
the amount of flux it receives. |
