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| Nebula | Abell4 | RA (J2000) | 02 45 23.9 |
| Constellation | Perseus | Dec | +42 33 03.0 |
| Size (arcsec) | 20 | Other names | PK 144-15.1 |
| Mag (V) | 15.6 | ||
| Surface Brightness (mag/arcsec2) | n/a |
| HAG 24" RC, ZWO ASI2600MM Pro, Lhires III, 300 gr/mm, 3 x 600 sec, 2023-12-19@21:28 |
| Very strong oxygen |
DSS2 image, 10 arcmin square
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3 / 209 (pg 183) |