# Eta Andromedae

> binary star system in the constellation Andromeda

**Wikidata**: [Q1359139](https://www.wikidata.org/wiki/Q1359139)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Eta_Andromedae)  
**Source**: https://4ort.xyz/entity/eta-andromedae


## References

1. SIMBAD
2. Rotational and radial velocities for a sample of 761 Hipparcos giants and the role of binarity
3. Application of the spectral subtraction technique to the Ca II H & K and H{epsilon} lines in a sample of chromospherically active binaries
4. Washington Double Star Catalog
5. Gaia Data Release 3
6. Freebase Data Dumps. 2013
7. Catalogue of Stellar Photometry in Johnson's 11-color system
8. VizieR Online Data Catalog: 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003)
9. Gaia Data Release 2
10. Gaia Early Data Release 3
11. Kinematics of chromospherically active binaries and evidence of an orbital period decrease in binary evolution
12. High-resolution spectroscopic survey of 671 GK giants. I - Stellar atmosphere parameters and abundances
13. Assessment of [Fe/H] determinations for FGK stars in spectroscopic surveys
14. Catalogue of rotational velocities of the stars
15. SP_Ace: a new code to derive stellar parameters and elemental abundances