# AP Leonis

> variable star

**Wikidata**: [Q5653775](https://www.wikidata.org/wiki/Q5653775)  
**Source**: https://4ort.xyz/entity/q5653775


## References

1. SIMBAD
2. VizieR
3. MK classifications of some northern hemisphere binary systems
4. Up-to-date linear elements of eclipsing binaries
5. The Tycho-2 catalogue of the 2.5 million brightest stars
6. ASAS photometry of ROSAT sources. I. Periodic variable stars coincident with bright sources from the ROSAT All Sky Survey
7. Gaia Data Release 2
8. VizieR Online Data Catalog: 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003)
9. Kinematics of W Ursae Majoris type binaries and evidence of the two types of formation