Star profile
139 Tauri
Hot blue starWhat is 139 Tauri
139 Tauri is a blue supergiant of class B1Ib in the Bull, around 1,600 light-years away from Earth. It belongs to that rare lineage of suns a hundred thousand times more luminous than ours, sentenced to short lives and explosive supernova endings. What we see as a pale spark on the northern horn of Taurus is in fact a colossal beacon whose light has already been travelling for sixteen full centuries.
Where it is and when to see it
139 Tauri lies in the northern celestial hemisphere. It is visible to the naked eye under a dark sky. Its best month of the year is December, when it culminates around midnight.
- From London it culminates about 64° above the horizon.
- From New York it culminates about 75° above the horizon.
- From Sydney it culminates about 30° above the horizon.
It can be seen from anywhere north of 64° S.
It ranks no. 38 in brightness among the 144 stars of Taurus in our catalogue. To find it, start from Aldebaran, the brightest: it lies about 21° away (a fist at arm's length covers about 10°).
The light you see today left it about 1,600 years ago.
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Astronomical data for 139 Tauri
- Constellation
- Taurus
- Apparent magnitude
- 4.81
- Distance
- 1553.3 light years
- Coordinates (J2000)
- RA 89.499° · Dec 25.954°
- Catalogue
- HIP 28237 · HD 40111
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Other stars in Taurus
Taurus has 144 stars in Stelvia's catalogue. Here are a few of them.
- AldebaranAlpha Tauri0.87
- ElnathBeta Tauri1.65
- AlcyoneEta Tauri2.85
- Pi Tauri4.69
- HIP 210294.78
- Delta 2 Tauri4.80
- 47 Tauri4.84
- 126 Tauri4.84