Star profile
HIP 81733
Hot blue starWhat is HIP 81733
In Ara —the small southern constellation between Scorpius and the Triangle— burns a B-type star, blue-white and very hot, far across the galaxy. Its light departed more than two thousand years ago, in the days of ancient Rome, when Augustus was founding an empire and Virgil finished the Aeneid. It crossed the silence of twenty centuries to arrive, untouched, at this very night.
Where it is and when to see it
HIP 81733 lies in the southern celestial hemisphere. It is visible to the naked eye under a dark sky. Its best month of the year is June, when it culminates around midnight.
- From London it never rises above the horizon.
- From New York it never rises above the horizon.
- From Sydney it culminates about 74° above the horizon.
It can be seen from anywhere south of 40° N.
It ranks no. 21 in brightness among the 43 stars of Ara in our catalogue. To find it, start from Beta Ara, the brightest: it lies about 9° away (a fist at arm's length covers about 10°).
The light you see today left it about 2,200 years ago.
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Leave your signature on HIP 81733
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A public signature from a real person. The chosen name is a symbolic denomination within Stelvia, with no official standing or IAU recognition: the sky is not for sale and belongs to no one.
Astronomical data for HIP 81733
- Constellation
- Ara
- Apparent magnitude
- 5.62
- Distance
- 2189.3 light years
- Coordinates (J2000)
- RA 250.418° · Dec -49.652°
- Catalogue
- HIP 81733 · HD 150168
A symbolic commemorative gift: neither the signature nor the chosen name implies ownership of the star or recognition by the IAU.
Other stars in Ara
Ara has 43 stars in Stelvia's catalogue. Here are a few of them.
- Beta Ara2.84
- Alpha Ara2.84
- Zeta Ara3.12
- HIP 830575.53
- HIP 821715.55
- HIP 817025.57
- HIP 831875.64
- HIP 873145.68