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A Class X star is a super rare star. Out of a sextillion stars, there could be only hundreds of them. While there are Luminous Blue Variables, Wolf-Rayet stars, and Navy-Blue stars that are generally more powerful than O-class stars, those types mentioned aren't main sequence stars, while Class X stars can be.

The Class X stars theoretically live for only 100,000 years, then would become red metagiants, and explode into extreme metanovas, then live a superpowered black hole absorbing nearby objects light years away.

Their habitable zones would be a few thousand AUs away, which is a fraction of a light-year!

Generally, these stars would be from light bluey purple (X9) to light violet (X5) to light pure purple (X0), in terms of color. The fact that purple light can't be currently seen hinders confirmation that these stars do exist.

Properties

Properties of typical X-type main-sequence stars
Spectral type Mass Luminosity Temperature (Fahrenheit)
X0V 300.0 30,000,000 1,000,000
X1V 200.0 15,000,000 580,000
X2V 160.0 10,000,000 425,000
X3V 133.0 7,500,000 355,000
X4V 115.0 5,678,901 285,000
X5V 100.0 4,250,000 215,000
X6V 87.0 3,333,000 175,000
X7V 75.0 2,500,000 150,000
X8V 66.0 2,000,000 130,000
X9V 59.0 1,600,000 115,000


See Also

Stellar Classes
Φ · Ψ · Ω · Q · DE · GR · σ ς · Θ · N · D · BS · Y · T · L · M · C · S · QS · K · G · F · A · B · LBV · β · O · W · N · X · n0 · Exotic (Π · Σ · Γ · Δ · μ) · δ · I · TŻO · BL · ·
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