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
Wikidata facts
- Instance of
- Cepheid variable
- Constellation
- Cepheus
- Distance from Earth
- 266
- Radius
- 44.5
- Variable-star type
- classical Cepheid variable
- Image
- Dceph.jpg
Show 17 more facts
- catalog code
- AG+58 1460
- effective temperature
- 5695
- spectral class
- F5IBSB,V
- stellar rotational velocity
- 10.829
- apparent magnitude
- 3.8506
- radial velocity
- -26.8351
- parallax
- 3.5551
- epoch
- J2000.0
- metallicity
- 0.113
- surface gravity
- 71
- luminosity
- 2000
- right ascension component of proper motion
- 14.56
- declination component of proper motion
- 3.238
- on focus list of Wikimedia project
- Wikipedia:Vital articles/Level/4
- Commons category
- Delta Cephei
- right ascension
- 337.29276110013086
- declination
- 58.41519378156944
Sources (3)
via Wikidata · CC0
~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.