Star profile
15 Triangulum
Cool red starWhat is 15 Triangulum
15 Trianguli is a cool red M-type star set against the small figure of the Triangle, that geometric wedge north of Aries. Its atmosphere, far cooler than the Sun's, soaks its light in a deep red; from some 632 light-years it reaches magnitude 5.38 only thanks to the vast size of an advanced giant. The light arriving tonight began its journey around 1394, still a century before the great oceanic voyages.
Where it is and when to see it
15 Triangulum lies in the northern celestial hemisphere. It is visible to the naked eye under a dark sky. Its best month of the year is November, when it culminates around midnight.
- From London it culminates about 73° above the horizon.
- From New York it culminates about 84° above the horizon.
- From Sydney it culminates about 21° above the horizon.
It can be seen from anywhere north of 55° S.
It ranks no. 10 in brightness among the 18 stars of Triangulum in our catalogue. To find it, start from Beta Triangulum, the brightest: it lies about 5° away (a fist at arm's length covers about 10°).
The light you see today left it about 630 years ago.
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Astronomical data for 15 Triangulum
- Constellation
- Triangulum
- Apparent magnitude
- 5.38
- Distance
- 632.2 light years
- Coordinates (J2000)
- RA 38.945° · Dec 34.688°
- Catalogue
- HIP 12086 · HD 16058
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Other stars in Triangulum
Triangulum has 18 stars in Stelvia's catalogue. Here are a few of them.
- Beta Triangulum3.00
- MothallahAlpha Triangulum3.42
- Gamma Triangulum4.03
- 7 Triangulum5.25
- 10 Triangulum5.29
- 12 Triangulum5.29
- Epsilon Triangulum5.50
- 11 Triangulum5.55