Star profile
30 Capricorni
Hot blue starWhat is 30 Capricorni
30 Capricorni is a blue B-type star, far hotter and more luminous than the Sun, set in the modest figure of the zodiacal Sea-Goat. Its hue betrays surface temperatures of tens of thousands of degrees. Its light departs more than five centuries ago toward us, crossing a region of sky sparsely populated with bright stars.
Where it is and when to see it
30 Capricorni lies in the southern 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 21° above the horizon.
- From New York it culminates about 31° above the horizon.
- From Sydney it culminates about 74° above the horizon.
It can be seen from anywhere south of 72° N.
It ranks no. 30 in brightness among the 48 stars of Capricornus in our catalogue. To find it, start from Deneb Algedi, the brightest: it lies about 7° away (a fist at arm's length covers about 10°).
The light you see today left it about 530 years ago.
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Astronomical data for 30 Capricorni
- Constellation
- Capricornus
- Apparent magnitude
- 5.40
- Distance
- 533.9 light years
- Coordinates (J2000)
- RA 319.489° · Dec -17.985°
- Catalogue
- HIP 105143 · HD 202671
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Other stars in Capricornus
Capricornus has 48 stars in Stelvia's catalogue. Here are a few of them.
- Deneb AlgediDelta Capricorni2.85
- DabihBeta Capricorni3.05
- AlgediAlpha 2 Capricorni3.58
- Chi Capricorni5.30
- 29 Capricorni5.31
- 33 Capricorni5.38
- Lambda Capricorni5.57
- HIP 1055765.63