Star profile
31 Cygni
Variable starWhat is 31 Cygni
31 Cygni pulses slowly along the neck of the Swan, an orange giant whose brightness drifts in its own quiet rhythm. Its light travels nearly nine centuries to reach us —it set out when medieval Europe had not yet heard of gunpowder—. An aged star, cooler than the Sun, burning with the amber calm of swollen atmospheres.
Where it is and when to see it
31 Cygni 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 never sets and culminates about 85° up.
- From New York it culminates about 84° above the horizon.
- From Sydney it culminates about 9° above the horizon.
It can be seen from anywhere north of 43° S.
It ranks no. 11 in brightness among the 137 stars of Cygnus in our catalogue. To find it, start from Deneb, the brightest: it lies about 5° away (a fist at arm's length covers about 10°).
The light you see today left it about 880 years ago.
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Astronomical data for 31 Cygni
- Constellation
- Cygnus
- Apparent magnitude
- 3.80
- Distance
- 884.0 light years
- Coordinates (J2000)
- RA 303.408° · Dec 46.741°
- Catalogue
- HIP 99675 · HD 192577
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Other stars in Cygnus
Cygnus has 137 stars in Stelvia's catalogue. Here are a few of them.
- DenebAlpha Cygni1.25
- SadrGamma Cygni2.23
- AljanahEpsilon Cygni2.48
- Tau Cygni3.74
- Iota 2 Cygni3.76
- Kappa Cygni3.80
- Eta Cygni3.89
- Nu Cygni3.94