# Q74637712
**Wikidata**: [Q74637712](https://www.wikidata.org/wiki/Q74637712)  
**Source**: https://4ort.xyz/entity/q74637712


## References

1. SIMBAD
2. An MK-like system of spectral classification for hot subdwarfs
3. Gaia Data Release 2
4. Fourth USNO CCD Astrograph Catalog
5. DA white dwarfs in Sloan Digital Sky Survey Data Release 7 and a search for infrared excess emission
6. A spectroscopic survey and analysis of bright, hydrogen-rich white dwarfs