| NGC 6646 | |
| Epoch: | J2000 |
| Constellation Name: | Lyra |
| Ra: | 1 |
| Z: | 0.019227 |
| H Radial V: | 5764 ± 34 km/s |
| Dist Ly: | NaNMpc |
| Type: | Sa |
| Size: | ~53.33kpc (estimated) |
| Appmag V: | 12.6 |
| Appmag B: | 13.5 |
| Sbrightness: | 13.40 mag/am2 |
NGC 6646 is a spiral galaxy located in the constellation Lyra.[1] Its velocity relative to the cosmic microwave background is 5,641 ± 35 km/s, which corresponds to a Hubble distance of 83.2 ± 5.9 Mpc (∼271 million ly).[2] NGC 6646 was discovered by the German-British astronomer William Herschel on 26 June 1802.[3] The luminosity class of NGC 6646 is I.
One supernova has been observed in NGC 6646: SN2024gqf (typeIa, mag. 19.7).[4]