Spectra of Planetary Nebulae
| Nebula | M2-40 | RA (J2000) | 18 21 23.8 |
| Constellation | Serpens | Dec | -06 01 55.2 |
| Size (arcsec) | 14 x 12 | Other names | PK 024+03.1 |
| Mag (V) | 15.8 | VV 175 | |
| Surface Brightness (mag/arcsec2) | 20.9 |
HAG 24" RC, SBIG STF-8300M, LHires II, 300gr/mm, 2 x 900 sec, 2022-08-19@22:53
Shows helium, sulphur and argon DSS2 image, 10 arcmin square
48 / 187 (pg 170)