# TW Ophiuchi

> variable star

**Wikidata**: [Q6137678](https://www.wikidata.org/wiki/Q6137678)  
**Source**: https://4ort.xyz/entity/q6137678


## References

1. SIMBAD
2. NSCC--A new scheme of classification of c-rich stars devised from optical and infrared observations
3. VizieR Online Data Catalog: General Catalogue of Variable Stars (Samus+, 2007-2017)
4. Fourth USNO CCD Astrograph Catalog
5. VizieR Online Data Catalog: 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003)
6. The DENIS database, 3rd Release
7. Gaia Early Data Release 3
8. Pulkovo Compilation of Radial Velocities for 35 495 Hipparcos stars in a common system
9. The chemical composition of carbon stars. I. Carbon, nitrogen and oxygen in 30 cool carbon stars in the galactic disk
10. Gaia Data Release 2