# Q80420731

> spectroscopic binary in the constellation Cancer

**Wikidata**: [Q80420731](https://www.wikidata.org/wiki/Q80420731)  
**Source**: https://4ort.xyz/entity/q80420731


## References

1. SIMBAD
2. Gravitational redshifts in main-sequence and giant stars
3. VizieR Online Data Catalog: 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003)
4. Kinematic parameters and membership probabilities of open clusters in the Bordeaux PM2000 catalogue
5. CCD photometry of old open cluster M 67
6. Gaia Data Release 2
7. Stellar radial velocities in the old open cluster M67 (NGC 2682). I. Memberships, binaries, and kinematics