# Q74207034
**Wikidata**: [Q74207034](https://www.wikidata.org/wiki/Q74207034)  
**Source**: https://4ort.xyz/entity/q74207034


## References

1. SIMBAD
2. Spectral types in the open cluster M 39
3. VizieR Online Data Catalog: 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003)
4. Gaia Data Release 2
5. A spectroscopic study of the open cluster M 39
6. A catalogue of stellar rotational velocities
7. Catalogue of rotational velocities of the stars