# Q90939556

> planetary nebula

**Wikidata**: [Q90939556](https://www.wikidata.org/wiki/Q90939556)  
**Source**: https://4ort.xyz/entity/q90939556


## References

1. SIMBAD
2. Towards an improvement in the spectral description of central stars of planetary nebulae
3. The Two Micron All Sky Survey (2MASS)
4. Gaia Data Release 2
5. The Magellanic Cloud Calibration of the Galactic Planetary Nebula Distance Scale