# HD 81817

> star in the constellation Draco

**Wikidata**: [Q5174496](https://www.wikidata.org/wiki/Q5174496)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/HD_81817)  
**Source**: https://4ort.xyz/entity/hd-81817


## References

1. SIMBAD
2. The Perkins catalog of revised MK types for the cooler stars
3. Extrasolar Planets Encyclopaedia
4. The Tycho-2 catalogue of the 2.5 million brightest stars
5. VizieR Online Data Catalog: 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003)
6. Gaia Early Data Release 3
7. Hybrid star HD 81817 accompanied by brown dwarf or substellar companion
8. The Revised TESS Input Catalog and Candidate Target List
9. Local kinematics of K and M giants from CORAVEL/Hipparcos/Tycho-2 data
10. The atmospheric parameters and spectral interpolator for the MILES stars
11. Catalogue of rotational velocities of the stars
12. Validation of the new Hipparcos reduction
13. Gaia Data Release 2