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| 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, ZWO ASI2600MM Pro, Lhires III, 300 gr/mm, 2 x 900 sec, 2022-08-19@22:53 |
| Shows helium, sulphur and argon |
DSS2 image, 10 arcmin square
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57 / 209 (pg 163) |