Star profile
17 Pegasi
What is 17 Pegasi
17 Pegasi is a blue-white A2Vnn main-sequence star roughly 401 light-years away in the great square of the Winged Horse. Its effective temperature hovers near 9,100 K, and it shines more than eighty times brighter than the Sun. The double «n» in its spectral type marks rotation so rapid that its spectral lines visibly broaden: it spins like a young top that has yet to know the friction of time.
Where it is and when to see it
17 Pegasi lies in the northern celestial hemisphere. It is visible to the naked eye under a dark sky. Its best month of the year is August, when it culminates around midnight.
- From London it culminates about 51° above the horizon.
- From New York it culminates about 61° above the horizon.
- From Sydney it culminates about 44° above the horizon.
It can be seen from anywhere north of 78° S.
It ranks no. 54 in brightness among the 98 stars of Pegasus in our catalogue. To find it, start from Enif, the brightest: it lies about 4° away (a fist at arm's length covers about 10°).
The light you see today left it about 400 years ago.
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Astronomical data for 17 Pegasi
- Constellation
- Pegasus
- Apparent magnitude
- 5.54
- Distance
- 400.7 light years
- Coordinates (J2000)
- RA 329.235° · Dec 12.076°
- Catalogue
- HIP 108339 · HD 208565
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Other stars in Pegasus
Pegasus has 98 stars in Stelvia's catalogue. Here are a few of them.
- EnifEpsilon Pegasi2.38
- ScheatBeta Pegasi2.44
- MarkabAlpha Pegasi2.49
- 75 Pegasi5.49
- 37 Pegasi5.51
- 15 Pegasi5.52
- 86 Pegasi5.55
- 67 Pegasi5.56