Star profile
9 Cepheus
Variable starWhat is 9 Cepheus
9 Cephei is a blue B-type variable kindled in the northern reach of the sky, within the constellation that outlines the silhouette of King Cepheus. Its glow is not steady: it pulses with the restless rhythm typical of massive stars, those young suns that burn faster and die sooner. Its light crosses space for hundreds —perhaps thousands— of years before surfacing as a bluish point among the northern circumpolar stars.
Where it is and when to see it
9 Cepheus lies in the northern celestial hemisphere. It is visible to the naked eye under a dark sky. Its best month of the year is October, when it culminates around midnight.
- From London it never sets and culminates about 79° up.
- From New York it never sets and culminates about 69° up.
- From Sydney it never rises above the horizon.
It can be seen from anywhere north of 28° S.
It ranks no. 20 in brightness among the 95 stars of Cepheus in our catalogue. To find it, start from Alderamin, the brightest: it lies about 2° away (a fist at arm's length covers about 10°).
The light you see today left it about 330,000 years ago.
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Astronomical data for 9 Cepheus
- Constellation
- Cepheus
- Apparent magnitude
- 4.76
- Distance
- 326200.0 light years
- Coordinates (J2000)
- RA 324.480° · Dec 62.082°
- Catalogue
- HIP 106801 · HD 206165
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Other stars in Cepheus
Cepheus has 95 stars in Stelvia's catalogue. Here are a few of them.
- AlderaminAlpha Cepheus2.45
- ErraiGamma Cepheus3.21
- AlfirkBeta Cepheus3.23
- 11 Cepheus4.55
- HIP 1131164.70
- Omicron Cepheus4.75
- HIP 1125194.77
- 24 Cepheus4.79