# V840 Herculis

> eclipsing binary star in the constellation Hercules

**Wikidata**: [Q86411582](https://www.wikidata.org/wiki/Q86411582)  
**Source**: https://4ort.xyz/entity/v840-herculis


## References

1. SIMBAD
2. VizieR
3. VizieR Online Data Catalog: 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003)
4. The Tycho-2 catalogue of the 2.5 million brightest stars
5. Gaia Early Data Release 3
6. Gaia Data Release 2