Pantheus System

Template:Star SystemThe Pantheus System, also known as EGC-13, AELNIS-1 or RS-8496-928-6-91668-45 is a .990 star system located in the fringes of the Orion Arm in the Milky Way. Pantheus is a binary system, consisting of a 1.26 M_☉ F9 spectral class star, known as Pantheus A (Cthnos), and a .67 M_☉ K5 spectral class star, known as Pantheus B (Klintriarch). From Sol, Pantheus appears as a magnitude 11.78 star in the constellation of Crater.

Both stars in the system have complicated planetary systems. Cthnos has eleven planets and twenty rounded moons, while Klintriarch has a system of twelve planets and 22 rounded moons. The majority of the system's mass resides in the Cthnoite system as it is orbited by five J-class planets, all of which have masses exceeding that of Jupiter. The Klintriarchian system by comparison is predominantly N-class and I-class planets.

The Pantheus System was first catalogued in early sky surveys of the 20th and 21st centuries. Interest in the system began when famous human explorer Sylvester Arsiza visited in 2245 and documented the system, adding it to his Expansion General Catalogue as EGC-13. When Arsiza later created Arsiza's List of Notable Interstellar Systems, Pantheus was classified as AELNIS-1.

Although Sylvester Arsiza would later discover more unique systems, the Pantheus System remains significant as one of his favorites, and one of the first he put considerable effort into investigating. The system is well known today among local residents of the Confederacy of Humanity. It is now administered as a historic location, offering tours of the system to visitors and drawing in a moderate attendance rate.

Location

The closest stellar systems and R-class planets to the Pantheus System.

The Pantheus System is located in the the same place as Earth, the Orion Arm of the Milky Way Galaxy. Pantheus is below the majority of galactic plane, resulting in a significant contrast between its view of the Milky way and the rest of the sky.

The closest stars system to Pantheus is the Abbaca Proxima system, at 4.14 ly away. The next nearest star systems are the Biother system (5.21 ly away) and the Biasint System (5.63 ly away), both of which have bodies with multicellular life. The closest R-Class planet to Pantheus is Akkurath, at 3.06 ly away. It is close enough to the system where Cthnos and Klintriarch appear as distinct stars if viewed from its surfcace.

The Solar System is 1,360.39 light years away from Pantheus.

System Architecture

Orbits of the suns of the Pantheus System. Barycenter shown in teal.

Pantheus is a binary system, with both Cthnos and Klintriarch orbiting a central Barycenter. Both orbits intersect, and Cthnos is the inner of the two orbits, having a pericenter of 139.26 AU and an apocenter of 419.39 AU. Klintriarch's orbit has a pericenter of 263.67 AU and an apocenter of 794.07 AU. The stars orbit with a 1:1 resonance, with both stars completing an orbit every 20,283 terran years. Cthnos travels at 952 mph while Klintriarch travels at 1,737 mph.

Both planetary systems have significantly deviant orbital planes. The Cthnoite planetary system is angled 50° relative to the plane of the system, while the Klintriarchian planetary system is angled 230° relative to the plane of the system.

The Pantheus system has no circumbinary planets.

System Bodies

The Pantheus system has a total of 23 planets, eleven of which are around Cthnos and twelve of which are around Klintriarch. The majority of the Panthian planets are gas giants, most of which have moons massive enough to undergo hydrostatic equilibrium, and some large enough to sustain liquid cycles and atmospheres. There are a total of 65 planetary mass objects in the Pantheus System.

Cthnoite System

The eleven Cthonite planets are generally more vast and massive than those of Klintriarch. The system alternates between massive gas giants and modest terrestrial planets.

Heaphance

Heaphance's superheated gas envelope glows fiery colors.

The first planet from Cthnos, Heaphance is a hot J-class world over four times the mass of Jupiter. Heaphance is primarily made of water vapor and hydrogen, with a substantial mantel and traces of helium. Despite being only the second most massive of the Cthnoite gas giants, its proximity to Cthnos renders Heaphance the largest planet in the Pantheus System. Heaphance is naturally a dark lavender color, but through thermal radiation appears red and yellow. The planet is large enough to be seen as a prominent disk at the orbit of Oaven, where it can appear as large as 13 arcminutes across and as bright as the full moon. Heaphance has 23 dwarf moons, many of which are bright enough to be seen around the planet's body from as distant as the orbit of Xua.

Due to its large size and brightness, Heaphance is one of the most distinct planets of the Panthian system, and is sometimes poetically referred to as Pantheus' Third Sun. Heaphance was the first planet found and cataloged by Sylvester Arsiza.

Oaven

Torrid clouds sweep across Oaven's water vapor atmosphere.

The second planet from Cthnos, Oaven is a torrid A-class Venus analogue almost two times the mass of Earth, and by far the hottest Panthian planet. Oaven has a substantial mantle around an iron core. The conditions on Oaven are incredibly hostile, with surface temperatures of around 2000 degrees °F. The surface of Oaven is mostly dark igneous rock, and scarred by the planet's active geology. Oaven's many volcanoes contribute to its runaway greenhouse atmosphere of water vapor and carbon dioxide, which weighs on the planet with a crushing 373 atm. From space, Oaven appears bright, tan in color and covered in cream colored clouds of carbon dioxide. Oaven has no moons, but both Heaphance and Geltrest can be seen large in the sky from the planet's orbit.

Oaven 's hot, super-Venusian conditions have led to its reputation as a "hell planet" and place of pain and banishment. Various missing person cases in the area have been attributed to tourist ships crashing into the planet and disintegrating in its stratosphere, though only one fatality has been officially confirmed.

Geltrest

Massive storms rage among the cloud bands of Geltrest.

The third planet from Cthnos, Geltrest is a warm J-class planet of twelve Jupiter masses. Geltrest is primarily composed of hydrogen, water vapor and helium, with a small core of silicate and iron. Geltrest is the fourth largest but second most massive Cthnoite gas giant. The planet's appearance is defined by bands of brown and orange gas, which are thought to be a result of the planet's internal heat. These bands are facilitated by the planet's incredibly fast rotational speed. Gelrest is notable as its axial tilt is significantly off the Cthnoite ecliptic, and its polar vortexes are visible

Geltrest rotates incredibly quickly.