# Red Rectangle Nebula

> planetary nebula

**Wikidata**: [Q878802](https://www.wikidata.org/wiki/Q878802)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Red_Rectangle_Nebula)  
**Source**: https://4ort.xyz/entity/red-rectangle-nebula


## References

1. Michigan catalogue of two-dimensional spectral types for the HD Stars, Vol. 5
2. SIMBAD
3. Freebase Data Dumps. 2013
4. Catalog of Galactic OB Stars
5. Gaia Data Release 2
6. VizieR Online Data Catalog: 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003)
7. Validation of the new Hipparcos reduction
8. The extremely iron-deficient "Post-AGB" stars and binaries
9. High-resolution spectroscopy of the central star of the Red-Rectangle nebula