# Q77842933
**Wikidata**: [Q77842933](https://www.wikidata.org/wiki/Q77842933)  
**Source**: https://4ort.xyz/entity/q77842933


## References

1. SIMBAD
2. NGC 6611: a cluster caught in the act
3. A catalogue of Be stars
4. VizieR Online Data Catalog: 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003)
5. Correlation between the spatial distribution of circumstellar disks and massive stars in the young open cluster NGC 6611
6. Pre-main-sequence isochrones – II. Revising star and planet formation time-scales
7. Gaia Data Release 2
8. Fourth USNO CCD Astrograph Catalog
9. The VLT-FLAMES survey of massive stars: Observations in the Galactic clusters NGC 3293, NGC 4755 and NGC 6611