Crossroads System Data

Star :

  • Spectral type: K3 V
  • Absolute Magnitude: 6.48
  • Mass: 0.78 MSun
  • Radius: 0.82 RSun
  • Surface Temperature: 4730 K
  • Age: 4.1 billion years

Planets :

Planets are described in the order of their relative position starting from Crossroads’ sun. Click on pictures to have a larger view (opened in a new windows/tab).

Crossroads I

CrI_thumb.jpg

Type : Gas giant, hot jovian category.

Orbital characteristics

  • Semi-major axis: 0.064 AU

1* Eccentricity: 0.001

  • Sidereal period: 0.01619 year (5.9 days)
  • Inclination: 0.1547°
  • Satellites: 0

Physical characteristics

  • Equatorial radius: 69417.4 km
  • Sidereal rotation period: 142 hours (5.9 days)
  • Axial tilt: 1.41°
  • Albedo: 0.573
  • Surface temperature: 700 K (above cloud layers), up to 900 K inside the atmosphere

Atmosphere

  • Surface pressure: ~ 200 kPa (highest cloud layer)
  • Composition:
    • ~ 88% Molecular hydrogen
    • ~ 11% Helium
    • 0.5% Methane
    • 0.1% Water vapor

Crossroads II (Panthal, originaly Panthalassa)

CrII_thumb.jpg

Type : Ocean-planet, hot neptunian category.

Orbital characteristics

  • Semi-major axis: 0.497 AU
  • Eccentricity: 0.008
  • Sidereal period: 0.35037 year (128 days)
  • Inclination: 0.2647°
  • Satellites: 3

Physical characteristics

  • Equatorial radius: 12756 km
  • Mass: 6 MEarth
  • Density : 4.122
  • Sidereal rotation period: 38.41 hours (1.6 days)
  • Axial tilt: 21.17°
  • Albedo: 0.28
  • Surface gravity : 1.4989 g
  • Surface temperature: 270 K (without atmosphere), average 304 K (31°C) on surface

Atmosphere

  • Surface pressure: 380.1 kPa (3.8 times Earth’s atmosphic pressure at sea level)
  • Composition:
    • 51.84% N2
    • 48.14% O2
    • 0.019% Carbon dioxide (190 ppm)
    • Trace water vapor

Note : See Panthal page for more details

Crossroads III

CrIII_thumb.jpg

Type : Telluric planet, prime compound : silicates

Orbital characteristics

  • Semi-major axis: 1.007 AU
  • Eccentricity: 0.027
  • Sidereal period: 1.0105 years (369 days)
  • Inclination: 17.48°
  • Satellites: 0

Physical characteristics

  • Equatorial radius: 4051.1 km
  • Sidereal rotation period: 20.68 hours
  • Axial tilt: 8.484°
  • Albedo: 0.201
  • Surface temperature: 190 K (without atmosphere), average 257 K (-16°C) on surface

Atmosphere

  • Surface pressure: 51.72 kPa (Earth’s atmosphic pressure at about 5500m above seal level)
  • Composition:
    • 97.12% N2
    • 2.85% Carbon dioxide
    • Trace water vapor and O2

Crossroads IV

CrIV_thumb.jpg

Type : Telluric planet, prime compound : ice

Orbital characteristics

  • Semi-major axis: 2.314 AU
  • Eccentricity: 0.2
  • Sidereal period: 3.52002 years (1286 days)
  • Inclination: 43.04°
  • Satellites: 11

Physical characteristics

  • Equatorial radius: 2947.5 km
  • Sidereal rotation period: 13.37 hours
  • Axial tilt: 0.714°
  • Albedo: 0.151
  • Surface temperature: 123 K (-150°C)

Atmosphere

  • Surface pressure: 0.47 Pa
  • Composition:
    • Trace ammonia, methane, nitrogen

Crossroads V

Type : Telluric planet, prime compound : ice

Orbital characteristics2

  • Semi-major axis: 11247.1 km
  • Eccentricity: 0.00001
  • Sidereal period: 13.37 hours
  • Inclination: 2.14°
  • Satellites: 0

Physical characteristics

  • Equatorial radius: 1294.3 km
  • Sidereal rotation period: 13.37 hours
  • Axial tilt: 0.717°
  • Albedo: 0.114
  • Surface temperature: 125 K (-148°C)

Atmosphere

  • Surface pressure: 0.21 Pa
  • Composition:
    • Trace methane, nitrogen

Note : Crossroads V and Crossroads IV form a double planet, both orbiting around a common barycentre that orbits Crossroads. However, Crossroads V is often considered as Crossroads IV's satellite being smaller and less massive. Their common barycentre is located at the very edge of Crossroads IV, so Crossroads V exact classification is still debated.

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