# R Orionis

> variable star in the constellation Orion

**Wikidata**: [Q31889284](https://www.wikidata.org/wiki/Q31889284)  
**Source**: https://4ort.xyz/entity/r-orionis


## References

1. SIMBAD
2. Identifying red variables in the Northern Sky Variability Survey
3. General Catalogue of Variable Stars
4. [SIMBAD](http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=R+Ori&submit=SIMBAD+search)
5. Spectral types of S and SC stars on the revised MK system
6. The All Sky Automated Survey. Variable Stars in the 0h - 6h Quarter of the Southern Hemisphere
7. Determination of pulsation periods and other parameters of 2875 stars classified as Mira in the All Sky Automated Survey (ASAS)
8. The Tycho-2 catalogue of the 2.5 million brightest stars
9. Catalogue of Stellar Photometry in Johnson's 11-color system
10. Gaia Data Release 2
11. VizieR Online Data Catalog: 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003)
12. Pulkovo Compilation of Radial Velocities for 35 495 Hipparcos stars in a common system