# VdB 40
**Wikidata**: [Q4009113](https://www.wikidata.org/wiki/Q4009113)  
**Source**: https://4ort.xyz/entity/q4009113


## References

1. SIMBAD
2. VizieR Online Data Catalog: Henry Draper Catalogue and Extension, published in Ann. Harvard Obs. 91-100 (1918-1925)
3. Gaia Data Release 2
4. VizieR Online Data Catalog: 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003)