# Delta Cephei

> binary star system

**Wikidata**: [Q13024](https://www.wikidata.org/wiki/Q13024)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Delta_Cephei)  
**Source**: https://4ort.xyz/entity/delta-cephei


## References

1. SIMBAD
2. Binary Cepheids: separations and mass ratios in 5 M_{sun}_binaries
3. Washington Double Star Catalog
4. Freebase Data Dumps. 2013
5. Observational studies of cepheid amplitudes. I. Period-amplitude relationships for galactic cepheids and interrelation of amplitudes
6. A three-dimensional map of the Milky Way using classical Cepheid variable stars
7. The HYG Database
8. Catalogue of Stellar Photometry in Johnson's 11-color system
9. Period-colour and amplitude-colour relations in classical Cepheid variables - IV. The multiphase relations
10. VizieR Online Data Catalog: 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003)
11. Gaia Early Data Release 3
12. APOGEE Data and Spectral Analysis from SDSS Data Release 16: Seven Years of Observations Including First Results from APOGEE-South
13. C, N, O and na abundances of cepheid variables: implications on the mixing process in the envelope
14. Gaia Data Release 2
15. Validation of the new Hipparcos reduction
16. The distribution of the elements in the galactic disk. III. A reconsideration of Cepheids from l = 30{deg} to 250{deg}