Spiral Galaxy · Leo

M66 NGC 3627

Magnitude
8.9
Season
Spring
Difficulty
Easy
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Imaging reference
NGC 3627 (M66) Spiral Galaxy

Observer's guide

About NGC 3627

NGC 3627 (M66) is catalogued as a spiral galaxy in Leo. Its J2000 position is RA 11:20:14.96, Dec +12:59:29.5, corresponding to 170.0626 degrees RA and 12.9915 degrees Dec. The local catalogue places it about 35,000,000 light-years away. Its referenced angular extent is approximately 11.43 by 5.99 arcminutes.

Observing tips

StarWatchr rates this as an easy target at magnitude 8.9. It is associated with spring observing, with midnight placement typically strongest around March. From 52 degrees north its theoretical meridian altitude is about 51 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 AGN. SIMBAD records the morphology as SA_B. A published radial velocity value is 724 km/s. The SIMBAD record currently connects it to 1527 bibliographic references.

At roughly 11.4 arcminutes across, it benefits from a narrower field and adequate image scale. Use the listed 11.43 by 5.99 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 M66 are kept separate from practical observing guidance.

Coordinates (J2000/ICRS)
RA 170.0626° · Dec 12.9915°
SIMBAD classification
AGN
Morphology
SA_B
Angular extent
11.43′ × 5.99′
Position angle
170°
Surface brightness
22.12 mag/arcsec²
Radial velocity
724 km/s
Redshift
0.00241793
Linked bibliography
1,527 references
Best midnight placement
March
Observable latitude range
-77° 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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