# DF Cygni
**Wikidata**: [Q87562488](https://www.wikidata.org/wiki/Q87562488)  
**Source**: https://4ort.xyz/entity/df-cygni


## References

1. SIMBAD
2. The metallicity and luminosity of RV Tauri variables from medium-resolution spectra
3. Long-period High-amplitude Red Variables in the KELT Survey
4. The Tycho-2 catalogue of the 2.5 million brightest stars
5. VizieR Online Data Catalog: 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003)
6. The All Sky Automated Survey. The Catalog of Variable Stars in the Kepler field of view
7. Catalogue of Stellar Photometry in Johnson's 11-color system
8. Gaia Early Data Release 3
9. Gaia Data Release 2