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Zodiac: Leo
Jul 23 - Aug 22
Read more about Leo.
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Aldebaran (α Tauri)

A binary star system at a distance of about 67 light years, Aldebaran is one of the most significant stars in the night sky. It is the main star in the constellation Bull and there marks the eye of the Bull. While the main star of this binary star system is only slightly heavier than our own Sun, its diameter is almost 45 that of our Sun. This makes it about 150 times as bright as our Sun. The companion of this huge main star is a red dwarf.
Declination
16.5098°
Right ascension
4h 35m 55.2s (68.98000°)
The magnitude (brightness) is measured on a logarithmic scale. Small numbers mean bright stars: A star with a brightness of 1 mag is 100 times brighter that an star with 6 mag.
Magnitude
1 mag
The distance is measured in light years (LY). A light year is the distance, that light travels within one year. 1 LJ is equal to about 5,878,630,000,000 miles.
Distance
65 LY
Tycho-Identifier
1266:1416:1
HIP-Identifier
21421
Spectral type
K5III
Color index
1.54
Every star belongs to a constellation, and 12 of those constellations are part of the zodiac.
Constellation
Taurus (Bull)
This is an ancient constellation. The reddish star Aldebaran marks the eye of the bull.
The Hyades open star cluster, Aldebaran in the upper right corner being the brightest star in it.
Image credit: NASA, ESA, and STScI
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This star is reserved and cannot be named.
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