Star profile
18 Aquilae
Variable starWhat is 18 Aquilae
18 Aquilae is a variable blue B-type star that pulses quietly in the Eagle, not far from Altair. Its surface burns at temperatures well above the Sun's, lending it the blue-white tint typical of massive, youthful stars. Some 698 light-years away, its light departed in the mid-fourteenth century, crossing space as Europe was only beginning to recover from the Black Death.
Where it is and when to see it
18 Aquilae lies in the northern celestial hemisphere. It is visible to the naked eye under a dark sky. Its best month of the year is July, when it culminates around midnight.
- From London it culminates about 50° above the horizon.
- From New York it culminates about 60° above the horizon.
- From Sydney it culminates about 45° above the horizon.
It can be seen from anywhere north of 79° S.
It ranks no. 23 in brightness among the 72 stars of Aquila in our catalogue. To find it, start from Altair, the brightest: it lies about 11° away (a fist at arm's length covers about 10°).
The light you see today left it about 700 years ago.
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Astronomical data for 18 Aquilae
- Constellation
- Aquila
- Apparent magnitude
- 5.07
- Distance
- 698.5 light years
- Coordinates (J2000)
- RA 286.744° · Dec 11.071°
- Catalogue
- HIP 93867 · HD 178125
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Other stars in Aquila
Aquila has 72 stars in Stelvia's catalogue. Here are a few of them.
- AltairAlpha Aquilae0.76
- TarazedGamma Aquilae2.72
- OkabZeta Aquilae2.99
- 26 Aquilae4.98
- 4 Aquilae5.02
- 36 Aquilae5.03
- 23 Aquilae5.10
- 37 Aquilae5.12