Star profile
Upsilon Sagittarii
Variable starWhat is Upsilon Sagittarii
Upsilon Sagittarii is a yellow type-F star in an especially dense region of the Milky Way, close to the galactic heart. Its light shifts gently, the characteristic pulse of stars that have lived through millions of years of nuclear fusion. The distance is vast —nearly 1,780 light-years— and its apparent brightness modest compared with the swarming suns of the galactic bulge piled up behind it.
Where it is and when to see it
Upsilon Sagittarii lies in the southern 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 23° above the horizon.
- From New York it culminates about 33° above the horizon.
- From Sydney it culminates about 72° above the horizon.
It can be seen from anywhere south of 74° N.
It ranks no. 21 in brightness among the 117 stars of Sagittarius in our catalogue. To find it, start from Kaus Australis, the brightest: it lies about 23° away (a fist at arm's length covers about 10°).
The light you see today left it about 1,800 years ago.
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Astronomical data for Upsilon Sagittarii
- Constellation
- Sagittarius
- Apparent magnitude
- 4.52
- Distance
- 1782.5 light years
- Coordinates (J2000)
- RA 290.432° · Dec -15.955°
- Catalogue
- HIP 95176 · HD 181615
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Other stars in Sagittarius
Sagittarius has 117 stars in Stelvia's catalogue. Here are a few of them.
- Kaus AustralisEpsilon Sagittarii1.79
- NunkiSigma Sagittarii2.05
- AscellaZeta Sagittarii2.60
- Arkab PosteriorBeta 2 Sagittarii4.27
- Theta 1 Sagittarii4.37
- 62 Sagittarii4.43
- 3 Sagittarii4.53
- 59 Sagittarii4.54