# Q74226884
**Wikidata**: [Q74226884](https://www.wikidata.org/wiki/Q74226884)  
**Source**: https://4ort.xyz/entity/q74226884


## References

1. SIMBAD
2. Magnitude, color and spectral type relations in the galactic cluster M 39
3. Distribution of the nearer bright stars in the color-luminosity array
4. Rotational velocities of stars metallic-line stars in M 39 and the Ursae Major cluster
5. Spectral types in the open cluster M 39
6. VizieR Online Data Catalog: 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003)
7. Gaia Data Release 2
8. A spectroscopic study of the open cluster M 39
9. Catalogue of rotational velocities of the stars
10. A catalogue of stellar rotational velocities