# VdB 4

> variable star

**Wikidata**: [Q4009112](https://www.wikidata.org/wiki/Q4009112)  
**Source**: https://4ort.xyz/entity/q4009112


## References

1. SIMBAD
2. Evolution of emission-line activity in intermediate-mass young stars
3. Catalogue of Stellar Photometry in Johnson's 11-color system
4. Gaia Data Release 2
5. VizieR Online Data Catalog: 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003)
6. Pulkovo Compilation of Radial Velocities for 35 495 Hipparcos stars in a common system