▲Sirius
Sirius is the brightest star in the sky as seen from Earth, second only to the Sun.
It is also known as one of the stars that make up the “Winter Triangle,” which adorns the winter night sky.
Using Orion as a guide, it is relatively easy to find.
It is about 8.6 light-years from Earth.
That makes it one of the stars located very close to us in the vastness of space.
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▲ Two Stars That Form One: A Binary Star
Sirius is not a single star;
it is a binary star system.
It consists of
・Primary star: Sirius A
・Companion star: Sirius B
These two stars exist in mutual interaction.
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▲ Characteristics of Sirius A (the primary star)
Sirius A shines with an intensity 25 times that of the Sun.
Its diameter reaches 2.5 million kilometers,
and it is believed to have formed 250 million years ago.
It truly is a symbol of light.
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▲ The nature of Sirius B (the companion star)
Sirius B, on the other hand, is a very unusual star.
Although its mass is almost the same as the Sun’s,
it is only about the size of the Earth.
This is because it is a star’s final form after the end of its life—
a white dwarf.
Even more astonishing is its temperature.
Sirius B has a surface temperature of 25,000 degrees,
which is 2.5 times that of Sirius A.
Energy condensed to the extreme within a tiny body.
That is Sirius B.
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▲ A history of discovery
Sirius A was confirmed in 1837.
Then, 25 years later—in 1862—Sirius B was discovered.
It was not until 2005
that enough detailed observational data on Sirius B had been gathered.
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▲ The mysterious number “25”
There is a common thread in the information presented so far.
It is—
the number “25”.
Strangely enough, this number appears throughout.
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▲ Kinji Tatsu and “25”
Inspired by Sirius, Kinji Tatsu was founded in 2025.
As we began the process of turning Sirius into jewelry in earnest, we noticed the presence of “25.” Using this number as a “key,” we were able to connect it with stones, shapes, and various other elements.
At Kinji Tatsu, we regard the number “25”
as a “sacred number” with special significance.
For this reason,
“Sirius Number 25”
is the name we have given it, and we treat it with great care.
From now on, in events and connections related to Sirius,
the number “25” will inevitably appear.