# Dumbbell Nebula

> Planetary nebula

**Wikidata**: [Q13628](https://www.wikidata.org/wiki/Q13628)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Dumbbell_Nebula)  
**Source**: https://4ort.xyz/entity/dumbbell-nebula


## References

1. SIMBAD
2. VizieR
3. [Messier 27](http://www.messier.seds.org/m/m027.html)
4. A spectroscopic survey and analysis of bright, hydrogen-rich white dwarfs
5. Freebase Data Dumps. 2013
6. The binary fraction of planetary nebula central stars – I. A high-precision, I-band excess search
7. Gaia Data Release 2
8. The Two Micron All Sky Survey (2MASS)
9. [Knots in Nearby Planetary Nebulae](http://adsabs.harvard.edu/abs/2002AJ....123.3329O)
10. General Catalogue of Stellar Radial Velocities
11. Hot star extension to the Hubble Space Telescope stellar spectral library