Delta Cephei
Sign in to saveAlso known as del Cep, δ Cephei, δ Cep, HD 213306, 27 Cep, 27 Cephei, HIP 110991, HIC 110991
binary star system
Key facts
- Constellation
- Cepheus
- Right ascension
- 22 29 10.26502
- Declination
- +58 ° 24 ′ 54.7139 ″
- Apparent magnitude v
- 3.48–4.37
- Spectral type
- F5Ib-G1Ib + B8IV
- Variable type
- Cepheid
via Wikipedia infobox
~5 min read
Encyclopedic overview
Delta Cephei is a quadruple star system in the northern constellation of Cepheus, the King. Its name is a Bayer designation that is Latinized from δ Cephei, and abbreviated Delta Cep or δ Cep. Based on parallax measurements, it is located approximately 890 light-years away from Earth. At this distance, the visual magnitude of the star is diminished by 0.23 as a result of extinction caused by gas and dust along the line of sight. It is the prototype of the Cepheid variable stars that undergo periodic changes in luminosity.
Discovery
Excerpted from Wikipedia’s “Delta Cephei” article, available under the CC BY-SA 4.0 licence.