A while back, I read this: [obviously a challenge, issued by: Roger Sanger.]
>IF YOU'RE A TRAVELER REF LIKE ME, THEN MY GUESS IS THAT YOU HAVE
>SOME OF, BUT NEED A LOT MORE OF THE FOLLOWING.....
and there followed a lengthy list of practically everything, except
new planetary systems. Well, here is a brief discription of a new star
system, probably beyond the
bounds of the old Imperium. This data might have easily come from an
automated servey
probe or maybe an Imperial Scout ship ....
PRIMARY STARS:
This system is a relativly far seperated binary with the two
components orbiting a common center of gravity in a nearly circular orbit
almost exactly 15 AUs apart. Both stars have attendant planetary systems.
STAR A: Spectral class F7v. This main sequence star is slightly
larger and brighter
that Sol. It's radius is 2.25 times Sool, while its total luminosity is 8.28
x 10^23 kw [2.125 sol]
The mass of this star is 1.5 times that of the sun. It's color index is
+0.45, giving it an effective surface temperature of 6,600 K.
STAR B: Spectral Class K3v. This is a cool organge star with a
radius 0.873 that of the sun and a mass of 0.7 sol.This star's total
luminosity is 1.79 x 10^22, or just under 5%
of the sun's luminosity. It'd color indesx is +1.10, giving it an effective
temperature of 4,150 K.
Both stars have five planets in orbit around them, the "Main"
planet is a double world
discribed in detail below which circles the "B" componet of the system. A and
B revolve around each other in a 38 year period.
The planets of both systems receive heat energy from both stars,
therefor it is necessary when estimating the amount of energy receieved by a
planet to take into account not only the primary star around which the planet
orbits, but also the radiation from the companion star. This is especially
important for planets in the "B" solar system.
{Note:} I use the total sub-solar temperature [Tss] of a planet as
a way of estimating if it gets enough solar radiation to support an
"earth-like" climate. The earth's sub-solar temperature is 395 K.
SOLAR SYSTEM DATA
STAR A PLANET NUMBER
ONE TWO THREE
FOUR FIVE
Distance [AU] 0.45 0.73 1.60
3.35 5.20
Tss from Primary 1,005 K 789 K 533 K
368 K 296 K
Tss from Comp [max] 68 K 69 K 71 K
76 K 82 K
[min] 66 K 65 K 64
K 60 K 58 K
Atmos Type Vacuum Vacuum Thin
Dense Massive
Main Gases
SO2, CO OXY H, H2, He
===== ==== Kr,
Ar, Xe NIT DH, CH4
NO, NO2 CO2, H2O NH3
Ar, He
Radius [km] 2,700 4,000 8,100
6,500 65,500
[Gas Giant]
moons? no no
no yes - 1 yes - 5
Mass [x earth] 0.06 0.496
1.358 1.000 195
STAR B ONE TWO THREE
FOUR FIVE
Distance [AU] 0.29 0.575
1.15 2.35 4.53
Tss From Primary 480 K 341 K 241 K
168 K 124 K
Tss From Comp {max} 176 K 178 K 181 K
190 K 206 K
{min} 172 K 171 K
168 K 162 K 153 K
Atmos Type vacuum thin
vacuum Dense Massive
Atmos Gases ==== Nitrogen
===== Nitrogen H, H2
NO,
NO2 Oxygen He, DH
NO3, CO H2O, CO2 CH4
SO2,
Ar Ar, Xe NH3
Radius [km] 3,600 5,900
2,600 special 26,200
Moons? no yes - 1
no see yes -6
Mass [xearth] 0.35 0.60
0.09 below 14.0
S P E C I A L >>>>>>>>>>>>>>>>>>>
The number four orbit slot in the "B" star system is filled by an
exotic double planet,
named Mega Earth and False Earth. They revolve around each other in a
circular orbit
242,580 kilometers in radius. False Earth completes a full revolution around
Mega Earth
once every 145 hour, 57 minutes, 23.614 seconds.
MEGA EARTH. Called thus because of it's large radius of 15,093 km [2.37
earth]. A lack of
heavy metals and metals in general gives this world an average density oof
only 3.98 gm/cm^3. The surface gravity is 1.058 that of earth. 60 percent of
Mega Earth is covered by
30-100 km deep water oceans in which live a wide array of both plants and
animals. The atmospher is rich in Nitrogen and Oxygen, whith traces of CO2,
H2O and Ar [vertually identical to earth.]
FALSE EARTH. This planet is virtually identical to earth in size, mass,
atmosphere, and richness of its ecology. The climate on both worlds ranges
from Arctic [-50 C] to cool temperate [+4 C to +18 C].
Neither world has a native sentient life form, but there are traces of
ancient {>10^7 yrs}
ruins of a high tech civilization scattered across the surface of False
Earth.
Visually, Mega Earth looks like a sphere 7 degrees in diameter, or 14 times
the diameter of the full moon from False Earth, and False Earth looks to be 3
degrees in diameter from Mega Earth. Since both planets have a "CLASS M"
[oops, that's from another game!] enviroment, both would be suitable for
colonization.
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Okay, Roger, is that anything akin to what you were looking for?
Rick Blackburn
[email removed]
or [email removed]