I meant to post this one, cos it seems the best one to me for textures, parameters and ...oddity.
It is the HD 223778 system, a nearby (35.19 light years away from Sun) stellar trio in the constellation of Cepheus.
First It is a close binary with twin cool components (both K3 dwarfs, which orbit around their barycenter within an Earthling week), then the couple has a widely separated M-dwarf companion in Pluto's orbital zone (46.9 AUs).
Since I had an article reporting radial velocity sets for this system, I created ".vels" and ".sys" files and then simulated planetary detection with Systemic Console and I found a stable planetary trio around the eclipsing binary. Thus this system could even be likely or undetected so far, who knows?
Here some pictures:
Eclipsing pair
Planet AaAbb - Shahar
It is a "Hot Super-Earth", with 10 times the mass of the Earth and massive enough to retain helium in its atmosphere. It's heated by the twin suns as if it were located in Mercury's orbital zone. Its skies appear hazy and blue due to methane content and Rayleigh scattering.
Planet AaAbc - Tanit
A dwarf jovian planet with 12 percent of Jupiter's mass. It is water-rich but does not lay in the habitable zone to be comfortable or at least to host moons suitable for life. Sulfur stains occur in cloudy features.
Planet AaAbd - Shalim
An Earth-sized planet orbiting within system's snowline. Its orbital zone is as cool as that of Mars but internal heat and double UV-ratio make planetary temperature not prohibitive for the existence of liquid water on the surface. Aeolian forces are really strong and tight oceans show a thin icy crust, although chilly rivers flow at the equator. Wide alien "lichen forests" cover planetary tropics and some simple multicellular animal lifeform is also present.
Shalim's EB sunset
Maybe I will add moons around the planets later.
To display the triple system you need to paste these data in the file "spectbins.stc" in "data" subfolder of "Celestia" folder. Plus to underline the relatively late type spectral type I added a "latekstar.jpg" texture.
Barycenter 11712 "HD 223778 A"
{
RA 1381.2833
Dec 76.4783
Distance 35.19
}
"HD 223778 Aa"
{
OrbitBarycenter "HD 223778 A"
SpectralType "K3V"
Texture "latekstar.jpg"
AppMag 6.4
EllipticalOrbit {
Period 0.0212
SemiMajorAxis 0.057
Eccentricity 0.0
Inclination 0.87
AscendingNode 56.072
ArgOfPericenter 213.139
MeanAnomaly 43.946
}
}
"HD 223778 Ab"
{
OrbitBarycenter "HD 223778 A"
SpectralType "K3V"
Texture "latekstar.jpg"
AppMag 6.4
EllipticalOrbit {
Period 0.0212
SemiMajorAxis 0.057
Eccentricity 0.0
Inclination 0.87
AscendingNode 56.072
ArgOfPericenter 33.139
MeanAnomaly 43.946
}
}
"HD 223778 B"
{
OrbitBarycenter "HD 223778 A"
SpectralType "M2V"
Texture "mstar.jpg"
AppMag 11.7
EllipticalOrbit {
Period 258.399
SemiMajorAxis 49.63
Eccentricity 0.048
Inclination 4.28
AscendingNode 56.072
ArgOfPericenter 33.139
MeanAnomaly 43.946
}
}
Stopping blathering, here is the possible add-on, available below:
http://www.megaupload.com/?d=KZZ6VGO0
Feedback would be appreciated and I wish to know if I can make this add-on freely downloadable at my website. Thank you for the attention.
