Cave Nebula (Sh2-155) – Hubble Palette Narrowband
Sh2-155, the Caldwell 9, is a region of ionised hydrogen in Cepheus, about 5 arcminutes across. Photographed with Skywatcher Esprit 120 840mm and ZWO ASI1600, in narrowband.
- Category
- Deep sky
- Object
- Sh2-155 (Caldwell 9, Cave Nebula)
- Position
- RA 344.2746 deg, Dec 62.6359 deg (ICRS J2000)
- Equipment
- Skywatcher Esprit 120 840mm · ZWO ASI1600 · 7nm HA + SII, Optolong 6.5nm OIII · iOptron CEM70 – Voyager · Pixinsight – Photoshop