# Q93947347

> planetary nebula

**Wikidata**: [Q93947347](https://www.wikidata.org/wiki/Q93947347)  
**Source**: https://4ort.xyz/entity/q93947347


## References

1. SIMBAD
2. A photometric selection of white dwarf candidates in Sloan Digital Sky Survey Data Release 10
3. The binary fraction of planetary nebula central stars – I. A high-precision, I-band excess search
4. The SDSS Photometric Catalog, Release 9
5. Gaia Data Release 2
6. SDSS DR7 white dwarf catalog