See also: Limnel

Name: Kaywell, Kaywell's Star.

Designation: Kaywell A

Discovered (Kerbin): Naked Eye Star. (0th Magnitude)

Rediscovered (Mesbin): AAAHHH MY EYES!

Kaywell, an F7V white main sequence star, is rather bright and large as stars go. Until the development of the first domed surface settlements, the sight of Kaywell was very rare, and it is so bright that many Mesbinite Kerbals prefer not to look at it. Hotter and brighter than the ancestral Sun Kerbol, Kaywell produces a lot of UV light, which can cause problems to unprotected vision and skin. Kaywell has two stellar companions: the distant cool red dwarf Gememma and the much closer red dwarf Limnel.

Physical Properties

Use of "solar" in this case really means a 1/10th scale, 1/100th mass, 1/100th luminosity ksp-scale Sol, not Kerbol and not the real-scale Sun.

• Radius = 89,700,000 meters. 1.289 Solar Radii.
• Mass = 2.33 x 10^28 kg. 1.17 Solar Masses. [See Note 1 below]
• Luminosity = 2.448 Solar Luminosities. [See note 2 below]
• Magnitude (from Mesbin/Kerbmun; Kaywell A only) = -26.99
• Magnitude (from Mesbin/Kerbmun; Kaywell A + Limnel) = -27.02
• Habitable Zone Nominal Radius = 1.587 kau.
• Surface Temperature = 6,400 Kelvins.
• Star Color = RGB(0.99,0.99,1)
• Rotation Period = 25,453 seconds. (7 hours, 4 minutes, 13 seconds.)
• Spectral Type = F7V
• Age = 2.0 Billion Years.
• Main Sequence Lifetime = 6.75 Billion Years.
• Metallicity [Fe/H] = 0.66696 dex. (Approximately 4.6 times as metal rich as the Sun)

Note 1: By default in-game, Kaywell is given the combined mass of the Kaywell/Limnel system: 1.7 Msol = 3.38 x 10^28 kg. There is a patch available in the settings.cfg to put Kaywell and Limnel around a barycenter, in which case Kaywell will have its "true" mass of 1.17 Msol. (It will also have 1.17 Msol if Principia is installed)

Note 2: The combined luminosity of Kaywell and Limnel is 2.52 Lsol, and the latter is what the Habitable Zone Nominal Radius is calculated from.

Barycentric Orbital Elements

These elements are used by Kaywell if it orbits the Kaywell/Limnel barycenter

• Orbital Parent: Kaywell Barycenter
• Semi Major Axis: 103,949,501 m.
• Orbital Period: 25,453 seconds. (7 hours, 4 minutes, 13 seconds.)
• Eccentricity: 0.00001
• Inclination: 0.01°
• Argument of Periapsis: 178°
• Longitude of Ascending Node: 322°
• Mean Anomaly at Epoch: -107°

Astrometry

(Interstellar Consortium, Kerbin-centric.)

The unit "ki" is the "kerbal interstellar." By default the unit is equal to 1.0 x 10^13 meters, but it can be reconfigured to be any size including 0.1 lightyears, sacrificing game stability for realism.

Kaywell's Star is one of the closest systems to the Kerbol system, and one of the brightest stars in the sky. If the ki = 0.1 ly it is comparable in brightness to the star Vega.

• Distance = 5.55 ki
• Declination = 32° 44' 45.13" (32.7458°)
• Right Ascension = 14 h 3 m 51.3016 s (210.9638°)
• XYZ Coordinates (from Galactic Core) = 6, -2.4, -3 ki.
• XYZ Coordinates (from Kerbol System) = -4, -2.4, -3 ki.
• Absolute Magnitude (Kaywell A + Limnel) (ki = 0.1 ly) = 3.83
• Absolute Magnitude (Kaywell A only) = 3.77
• Apparent Magnitude (ki = 1e13 m) = -9.90
• Apparent Magnitude (ki = 0.1 ly) = -0.02

Planetary System

Kaywell has a very massive system of planets, with three giant planets and three Super-Earth planets. All planets have moons, except for Shol. There's also several known minor planets.

Planets:

• Shol
• Tyepolbynar
• Mesbin/Derbin
• Valyr
• Egad
• Reander

Stellar Companions

Kaywell C, also known as Limnel, is a red dwarf star of type M1Ve. It orbits very close to Kaywell over the course of about 7 hours.

Kaywell B, also known as Gememma, and erroneously as Rodocer, is a red dwarf star of type M8V. It orbits at an average distance of 33 kau, taking 44 years to do so. It also has several known planets. Gememma seems to be older than Kaywell, and thus is probably captured into orbit, though the exact capture dynamics are fairly poorly understood as Gememma's orbit is far less eccentric than would be expected.