# Cave Nebula (C 9)

Cave Nebula (C 9) is an emission nebula in the constellation Cepheus, magnitude 7.7, 50′ × 30′ across.

A faint emission nebula in Cepheus with a dark 'cave mouth' along one side; it needs dark skies and a UHC filter.

## When and where to see it

It is best placed in the evening sky around October, when it crosses the meridian at about 10 pm local time (around midnight in September). It can be seen from everywhere north of 27°S and never sets north of 27°N.

At its highest it stands 77° up from 50°N, 62° up from 35°N, 27° up from the equator, below the horizon from 35°S.

## Facts

- Type: Emission nebula
- Constellation: Cepheus
- Designations: C 9, Sh2-155
- Magnitude: 7.7
- Apparent size: 50′ × 30′
- Position: RA 22h 57.9m, Dec +62° 31′ (J2000)

Open AstroPilot to see when Cave Nebula (C 9) is highest tonight from your location, how easy it is with your telescope or binoculars, and an eyepiece view. https://astropilot.space/object/C9