# Hourglass Nebula

> planetary nebula in the constellation Musca

**Wikidata**: [Q1047271](https://www.wikidata.org/wiki/Q1047271)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Engraved_Hourglass_Nebula)  
**Source**: https://4ort.xyz/entity/hourglass-nebula


## References

1. [SIMBAD](http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=PN+MyCn+18)
2. SIMBAD
3. Freebase Data Dumps. 2013
4. Fourth USNO CCD Astrograph Catalog
5. The DENIS database, 3rd Release
6. Gaia Data Release 2
7. VizieR Online Data Catalog: 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003)
8. The Magellanic Cloud Calibration of the Galactic Planetary Nebula Distance Scale