Cosmic Atlas object record
NGC 6618 Checkmark Nebula
NGC6618, NGC 6618, M017, Messier 017, Checkmark Nebula, Lobster Nebula, Swan Nebula, omega Nebula
- Object type
- nebula
- Constellation
- Sgr
- Right ascension
- 275.19629167°
- Declination
- -16.17152778°
- Reference frame
- J2000 equatorial catalog coordinates
- Distance
- 5435.93962862326 ly
- Distance kind
- Not supplied by the source catalog
- Uncertainty
- Not supplied by the source catalog
- Apparent magnitude
- 7.0
- Catalog source
- openngc_ngc_ic_catalog
- Catalog epoch
- J2000 catalog coordinates
- Position epoch
- J2000
- Selection caveat
- OpenNGC Pax is not treated as parallax for galaxies. Galactic classes never use Hubble-flow redshift or radial-velocity distance, and radial velocity alone is never converted to distance.
- Cosmology
- Not supplied by the source catalog