Planetary Nebula · Aquarius

C55 Saturn Nebula

Magnitude
8
Season
Summer
Difficulty
Hard
Star-hop chart
C550.0° field0° rotation
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Imaging reference
Saturn Nebula (C55) Planetary Nebula

Observer's guide

About Saturn Nebula

Saturn Nebula (C55) is catalogued as a planetary nebula in Aquarius. Its J2000 position is RA 21:04:11, Dec -11:21:48, corresponding to 316.0451 degrees RA and -11.3635 degrees Dec. The local catalogue places it about 1,400 light-years away. Its referenced angular extent is approximately 0.71 by 0.52 arcminutes.

Observing tips

StarWatchr rates this as a hard target at magnitude 8. It is associated with summer observing, with midnight placement typically strongest around August. From 52 degrees north its theoretical meridian altitude is about 26.6 degrees; local horizons and the live altitude chart determine the practical window.

A small telescope under reasonably dark skies is a good starting point; use the live altitude chart to choose its highest point.

What to expect

The SIMBAD classification for the matched source is PN. A published radial velocity value is -46.6 km/s. The SIMBAD record currently connects it to 1024 bibliographic references.

At roughly 0.7 arcminutes across, it benefits from a narrower field and adequate image scale. Use the listed 0.71 by 0.52 arcminute extent to check framing, and treat catalogue magnitude as integrated brightness rather than a direct measure of visual contrast.

Sourced catalogue data

Scientific record

Measurements for C55 are kept separate from practical observing guidance.

Coordinates (J2000/ICRS)
RA 316.045065° · Dec -11.363494°
SIMBAD classification
PN
Angular extent
0.71′ × 0.52′
Position angle
70°
Surface brightness
15.55 mag/arcsec²
Radial velocity
-46.6 km/s
Redshift
-0.00015543
Linked bibliography
1,024 references
Best midnight placement
August
Observable latitude range
-90° to 78.6°

Source: SIMBAD astronomical database (CDS, Strasbourg) (ODbL; checked 2026-08-09). Catalogue values may change when new measurements are published.

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