Globular Cluster · Delphinus

C42 NGC 7006

Magnitude
10.6
Season
Summer
Difficulty
Very Hard
Star-hop chart
C420.0° field0° rotation
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Imaging reference
NGC 7006 (C42) Globular Cluster

Observer's guide

About NGC 7006

NGC 7006 (C42) is catalogued as a globular cluster in Delphinus. Its J2000 position is RA 21:01:30, Dec +16:11:15, corresponding to 315.3728 degrees RA and 16.1879 degrees Dec. The local catalogue places it about 135,000 light-years away. Its referenced angular extent is approximately 1.11 by 1.02 arcminutes.

Observing tips

StarWatchr rates this as a very hard target at magnitude 10.6. It is associated with summer observing, with midnight placement typically strongest around August. From 52 degrees north its theoretical meridian altitude is about 54.2 degrees; local horizons and the live altitude chart determine the practical window.

Because it is faint, use a larger aperture where possible, avoid bright Moon conditions, and use averted vision.

What to expect

The SIMBAD classification for the matched source is GlC. A published radial velocity value is -383.2 km/s. The SIMBAD record currently connects it to 566 bibliographic references.

At roughly 1.1 arcminutes across, it benefits from a narrower field and adequate image scale. Use the listed 1.11 by 1.02 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 C42 are kept separate from practical observing guidance.

Coordinates (J2000/ICRS)
RA 315.372771° · Dec 16.187914°
SIMBAD classification
GlC
Angular extent
1.11′ × 1.02′
Position angle
85°
Radial velocity
-383.2 km/s
Redshift
-0.0012774
Linked bibliography
566 references
Best midnight placement
August
Observable latitude range
-73.8° to 90°

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

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