# DR 21

> bipolar outflow in the constellation Cygnus

**Wikidata**: [Q5098469](https://www.wikidata.org/wiki/Q5098469)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/DR_21)  
**Source**: https://4ort.xyz/entity/dr-21


## References

1. SIMBAD
2. Extrasolar Planets Encyclopaedia
3. The McDonald observatory planet search: new long-period giant planets and two interacting jupiters in the HD 155358 system
4. The Cygnus X region. XVIII. A detailed investigation of radio-continuum structure on large and small scales