# M51-ULS-1

> star

**Wikidata**: [Q99638876](https://www.wikidata.org/wiki/Q99638876)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/M51-ULS-1)  
**Source**: https://4ort.xyz/entity/m51-uls-1


## References

1. SIMBAD
2. Hubble Space Telescope identification of the optical counterparts of ultraluminous X-ray sources in M 51
3. Near-infrared counterparts of ultraluminous X-ray sources