# EM* SR 9

> variable star

**Wikidata**: [Q6158291](https://www.wikidata.org/wiki/Q6158291)  
**Source**: https://4ort.xyz/entity/em-sr-9


## References

1. SIMBAD
2. An optical spectroscopic study of T Tauri stars. I. Photospheric properties
3. ASAS photometry of ROSAT sources. I. Periodic variable stars coincident with bright sources from the ROSAT All Sky Survey
4. The Tycho-2 catalogue of the 2.5 million brightest stars
5. Second USNO CCD Astrograph Catalog
6. The DENIS database, 3rd Release
7. Gaia Data Release 2
8. VizieR Online Data Catalog: 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003)
9. The RAdial velocity experiment (RAVE): third data release
10. Starspots
11. Search for associations containing young stars (SACY). I. Sample and searching method
12. The FEROS-Lick/SDSS observational data base of spectral indices of FGK stars for stellar population studies