Globular Cluster · Musca

C105 NGC 4833

Magnitude
7.4
Season
Spring
Difficulty
Moderate
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Imaging reference
NGC 4833 (C105) Globular Cluster

Observer's guide

About NGC 4833

NGC 4833 (C105) is catalogued as a globular cluster in Musca. Its J2000 position is RA 12:59:35, Dec -70:52:28, corresponding to 194.8913 degrees RA and -70.8765 degrees Dec. The local catalogue places it about 19,600 light-years away. Its referenced angular extent is approximately 13.5 by 13.5 arcminutes.

Observing tips

StarWatchr rates this as a moderate target at magnitude 7.4. It is associated with spring observing, with midnight placement typically strongest around March. From 52 degrees north its theoretical meridian altitude is about 0 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 GlC. A published radial velocity value is 202 km/s. The SIMBAD record currently connects it to 474 bibliographic references.

At roughly 13.5 arcminutes across, it benefits from a narrower field and adequate image scale. Use the listed 13.5 by 13.5 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 C105 are kept separate from practical observing guidance.

Coordinates (J2000/ICRS)
RA 194.891333° · Dec -70.8765°
SIMBAD classification
GlC
Angular extent
13.5′ × 13.5′
Position angle
90°
Radial velocity
202 km/s
Redshift
0.00067403
Linked bibliography
474 references
Best midnight placement
March
Observable latitude range
-90° to 19.1°

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

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